Dasgupta, Romit [Thu, 6 Nov 2008 10:16:18 +0000 (15:46 +0530)]
[netdrvr] smc911x: fix for driver resume (and compilation warning)
I am trying out suspend, resume on an OMAP3 based board. What I see
during resume is that the SMC911x driver resume routing gets stuck
after trying to transmit the packet out of the controller. Some debug
messages below:
--> smc911x_drv_resume
eth0: --> smc911x_reset
eth0: smc911x_reset timeout waiting for PM restore
eth0: --> smc911x_enable
eth0: --> smc911x_phy_configure()
eth0: --> smc911x_phy_reset()
eth0: phy caps=0x782d
eth0: phy advertised caps=0x0de1
eth0: --> smc911x_phy_check_media
smc911x_phy_read: phyaddr=0x1, phyreg=0x01, phydata=0x7809
smc911x_phy_read: phyaddr=0x1, phyreg=0x01, phydata=0x7809
eth0: link down
Restarting tasks ... eth0: --> smc911x_hard_start_xmit
eth0: --> smc911x_hardware_send_pkt
eth0: --> smc911x_hard_start_xmit
eth0: --> smc911x_hardware_send_pkt
eth0: --> smc911x_hard_start_xmit
eth0: --> smc911x_hardware_send_pkt
nfs: server 172.24.190.217 not responding, still trying
nfs: server 172.24.190.217 not responding, still trying
The following change makes it work fine: (The change within
smc911x_drv_probe function was to get rid of a compilation warning).
Signed-off-by: Romit Dasgupta <romit@ti.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Steve Wise [Thu, 6 Nov 2008 23:06:42 +0000 (17:06 -0600)]
RDMA/cxgb3: deadlock in iw_cxgb3 can cause hang when configuring interface.
When the iw_cxgb3 module's cxgb3_client "add" func gets called by the
cxgb3 module, the iwarp driver ends up calling the ethtool ops get_drvinfo
function in cxgb3 to get the fw version and other info. Currently the
iwarp driver grabs the rtnl lock around this down call to serialize.
As of 2.6.27 or so, things changed such that the rtnl lock is held around
the call to the netdev driver open function. Also the cxgb3_client "add"
function doesn't get called if the device is down.
So, if you load cxgb3, then load iw_cxgb3, then ifconfig up the device,
the iw_cxgb3 add func gets called with the rtnl_lock held. If you
load cxgb3, ifconfig up the device, then load iw_cxgb3, the add func
gets called without the rtnl_lock held. The former causes the deadlock,
the latter does not.
In addition, there are iw_cxgb3 sysfs handlers that also can call
down into cxgb3 to gather the fw and hw versions. These can be called
concurrently on different processors and at any time. Thus we need to
push this serialization down in the cxgb3 driver get_drvinfo func.
The fix is to remove rtnl lock usage, and use a per-device lock in cxgb3.
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Brice Goglin [Mon, 10 Nov 2008 12:58:41 +0000 (13:58 +0100)]
myri10ge: fix stop/go ordering even more
The doorbell writes may be seen out of order by the firmware if they
are in WC memory since the tx spin(un)lock does not flush WC writes.
Hence if the "stop" is written on a different CPU than the "go", it
is possible that the stop will arrive after the go unless we add an
explicit memory barrier (and mmiowb() is not enough).
It fixes transmit hangs in multi tx queue mode.
Signed-off-by: Brice Goglin <brice@myri.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Before commit b6c40d68ff6498b7f63ddf97cf0aa818d748dee7 ("net: only
invoke dev->change_rx_flags when device is UP"), the dsa driver could
sort-of get away with only fiddling with the master interface's
allmulti/promisc counts in ->change_rx_flags() and not touching them
in ->open() or ->stop(). After this commit (note that it was merged
almost simultaneously with the dsa patches, which is why this wasn't
caught initially), the breakage that was already there became more
apparent.
Since it makes no sense to keep the master interface's allmulti or
promisc count pinned for a slave interface that is down, copy the vlan
driver's sync logic (which does exactly what we want) over to dsa to
fix this.
Bug report from Dirk Teurlings <dirk@upexia.nl> and Peter van Valderen
<linux@ddcrew.com>.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Tested-by: Peter van Valderen <linux@ddcrew.com> Signed-off-by: David S. Miller <davem@davemloft.net>
dsa: fix skb->pkt_type when mac address of slave interface differs
When a dsa slave interface has a mac address that differs from that
of the master interface, eth_type_trans() won't explicitly set
skb->pkt_type back to PACKET_HOST -- we need to do this ourselves
before calling eth_type_trans().
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: fix setting of skb->tail in skb_recycle_check()
Since skb_reset_tail_pointer() reads skb->data, we need to set
skb->data before calling skb_reset_tail_pointer(). This was causing
spurious skb_over_panic()s from skb_put() being called on a recycled
skb that had its skb->tail set to beyond where it should have been.
Bug report from Peter van Valderen <linux@ddcrew.com>.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 11 Nov 2008 05:43:08 +0000 (21:43 -0800)]
net: fix /proc/net/snmp as memory corruptor
icmpmsg_put() can happily corrupt kernel memory, using a static
table and forgetting to reset an array index in a loop.
Remove the static array since its not safe without proper locking.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Benjamin Thery [Tue, 11 Nov 2008 00:34:11 +0000 (16:34 -0800)]
ipv6: fix ip6_mr_init error path
The order of cleanup operations in the error/exit section of ip6_mr_init()
is completely inversed. It should be the other way around.
Also a del_timer() is missing in the error path.
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Williams [Fri, 7 Nov 2008 01:47:17 +0000 (01:47 +0000)]
[4/4] dca: fixup initialization dependency
Mark dca_init as a subsys_initcall since it needs to be ready to go
before dependent drivers start registering themselves.
Cc: <stable@kernel.org> Reported-and-tested-by: Mark Rustad <mark_rustad@Xiotech.com> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Error handling needs to be modified in dma_pin_iovec_pages().
It should return NULL instead of ERR_PTR
(pinned_list is checked for NULL in tcp_recvmsg() to determine
if iovec pages have been successfully pinned down).
In case of error for the first iovec,
local_list->nr_iovecs needs to be initialized.
Cc: <stable@kernel.org> Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
[1/4] I/OAT: fix channel resources free for not allocated channels
If the ioatdma driver is loaded but not used it does not allocate descriptors.
Before it frees channel resources it should first be sure
that they have been previously allocated.
Cc: <stable@kernel.org> Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Tested-by: Tom Picard <tom.s.picard@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yup, this appears to be the problem, thanks. I think &hso_net->net->dev
is more intuitive for the error message, so I've used that. I've also
added missing line endings on the error messages and set our local
rfkill structure element to NULL on failure so we don't try to call
rfkill_unregister on driver removal if we failed to register at all.
The patch below Works For Me (TM); the device is detected fine, can be
removed without problems and connects ok. I'll have a prod at why the
rfkill stuff isn't working next, but I believe this cleanup of the error
handling is appropriate no matter what the issue with registration is.
Signed-Off-By: Jonathan McDowell <noodles@earth.li> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Cc: Denis Joseph Barrow <D.Barow@option.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
net: Fix recursive descent in __scm_destroy().
iwl3945: fix deadlock on suspend
iwl3945: do not send scan command if channel count zero
iwl3945: clear scanning bits upon failure
ath5k: correct handling of rx status fields
zd1211rw: Add 2 device IDs
Fix logic error in rfkill_check_duplicity
iwlagn: avoid sleep in softirq context
iwlwifi: clear scanning bits upon failure
Revert "ath5k: honor FIF_BCN_PRBRESP_PROMISC in STA mode"
tcp: Fix recvmsg MSG_PEEK influence of blocking behavior.
netfilter: netns ct: walk netns list under RTNL
ipv6: fix run pending DAD when interface becomes ready
net/9p: fix printk format warnings
net: fix packet socket delivery in rx irq handler
xfrm: Have af-specific init_tempsel() initialize family field of temporary selector
Linus Torvalds [Thu, 6 Nov 2008 23:57:24 +0000 (15:57 -0800)]
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
Revert "x86: default to reboot via ACPI"
x86: align DirectMap in /proc/meminfo
AMD IOMMU: fix lazy IO/TLB flushing in unmap path
x86: add smp_mb() before sending INVALIDATE_TLB_VECTOR
x86: remove VISWS and PARAVIRT around NR_IRQS puzzle
x86: mention ACPI in top-level Kconfig menu
x86: size NR_IRQS on 32-bit systems the same way as 64-bit
x86: don't allow nr_irqs > NR_IRQS
x86/docs: remove noirqbalance param docs
x86: don't use tsc_khz to calculate lpj if notsc is passed
x86, voyager: fix smp_intr_init() compile breakage
AMD IOMMU: fix detection of NP capable IOMMUs
Linus Torvalds [Thu, 6 Nov 2008 23:53:47 +0000 (15:53 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
Block: use round_jiffies_up()
Add round_jiffies_up and related routines
block: fix __blkdev_get() for removable devices
generic-ipi: fix the smp_mb() placement
blk: move blk_delete_timer call in end_that_request_last
block: add timer on blkdev_dequeue_request() not elv_next_request()
bio: define __BIOVEC_PHYS_MERGEABLE
block: remove unused ll_new_mergeable()
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[WATCHDOG] SAM9 watchdog - supported on all SAM9 and CAP9 processors
[WATCHDOG] SAM9 watchdog - update for moved headers
Linus Torvalds [Thu, 6 Nov 2008 23:50:11 +0000 (15:50 -0800)]
Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md:
md: linear: Fix a division by zero bug for very small arrays.
md: fix bug in raid10 recovery.
md: revert the recent addition of a call to the BLKRRPART ioctl.
Linus Torvalds [Thu, 6 Nov 2008 23:45:57 +0000 (15:45 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
net/9p: fix printk format warnings
unsigned fid->fid cannot be negative
9p: rdma: remove duplicated #include
p9: Fix leak of waitqueue in request allocation path
9p: Remove unneeded free of fcall for Flush
9p: Make all client spin locks IRQ safe
9p: rdma: Set trans prior to requesting async connection ops
David S. Miller [Thu, 6 Nov 2008 23:45:32 +0000 (15:45 -0800)]
net: Fix recursive descent in __scm_destroy().
__scm_destroy() walks the list of file descriptors in the scm_fp_list
pointed to by the scm_cookie argument.
Those, in turn, can close sockets and invoke __scm_destroy() again.
There is nothing which limits how deeply this can occur.
The idea for how to fix this is from Linus. Basically, we do all of
the fput()s at the top level by collecting all of the scm_fp_list
objects hit by an fput(). Inside of the initial __scm_destroy() we
keep running the list until it is empty.
Signed-off-by: David S. Miller <davem@davemloft.net>
David Howells [Wed, 5 Nov 2008 17:38:47 +0000 (17:38 +0000)]
Fix accidental implicit cast in HR-timer conversion
Fix the hrtimer_add_expires_ns() function. It should take a 'u64 ns' argument,
but rather takes an 'unsigned long ns' argument - which might only be 32-bits.
On FRV, this results in the kernel locking up because hrtimer_forward() passes
the result of a 64-bit multiplication to this function, for which the compiler
discards the top 32-bits - something that didn't happen when ktime_add_ns() was
called directly.
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:55 +0000 (12:53 -0800)]
fat: Fix ATTR_RO for directory
FAT has the ATTR_RO (read-only) attribute. But on Windows, the ATTR_RO
of the directory will be just ignored actually, and is used by only
applications as flag. E.g. it's setted for the customized folder by
Explorer.
This adds "rodir" option. If user specified it, ATTR_RO is used as
read-only flag even if it's the directory. Otherwise, inode->i_mode
is not used to hold ATTR_RO (i.e. fat_mode_can_save_ro() returns 0).
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:54 +0000 (12:53 -0800)]
fat: Fix ATTR_RO in the case of (~umask & S_WUGO) == 0
If inode->i_mode doesn't have S_WUGO, current code assumes it means
ATTR_RO. However, if (~[ufd]mask & S_WUGO) == 0, inode->i_mode can't
hold S_WUGO. Therefore the updated directory entry will always have
ATTR_RO.
This adds fat_mode_can_hold_ro() to check it. And if inode->i_mode
can't hold, uses -i_attrs to hold ATTR_RO instead.
With this, we don't set ATTR_RO unless users change it via ioctl() if
(~[ufd]mask & S_WUGO) == 0.
And on FAT_IOCTL_GET_ATTRIBUTES path, this adds ->i_mutex to it for
not returning the partially updated attributes by FAT_IOCTL_SET_ATTRIBUTES
to userland.
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:54 +0000 (12:53 -0800)]
fat: Cleanup FAT attribute stuff
This adds three helpers:
fat_make_attrs() - makes FAT attributes from inode.
fat_make_mode() - makes mode_t from FAT attributes.
fat_save_attrs() - saves FAT attributes to inode.
Then this replaces: MSDOS_MKMODE() by fat_make_mode(), fat_attr() by
fat_make_attrs(), ->i_attrs = attr & ATTR_UNUSED by fat_save_attrs().
And for root inode, those is used with ATTR_DIR instead of bogus
ATTR_NONE.
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:52 +0000 (12:53 -0800)]
fat: Kill d_invalidate() in vfat_lookup()
d_invalidate() for positive dentry doesn't work in some cases
(vfsmount, nfsd, and maybe others). shrink_dcache_parent() by
d_invalidate() is pointless for vfat usage at all.
So, this kills it, and intead of it uses d_move().
To save old behavior, this returns alias simply for directory (don't
change pwd, etc..). the directory lookup shouldn't be important for
performance.
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:51 +0000 (12:53 -0800)]
fat: Fix/Cleanup dcache handling for vfat
- Add comments for handling dcache of vfat.
- Separate case-sensitive case and case-insensitive to
vfat_revalidate() and vfat_ci_revalidate().
vfat_revalidate() doesn't need to drop case-insensitive negative
dentry on creation path.
- Current code is missing to set ->d_revalidate to the negative dentry
created by unlink/etc..
This sets ->d_revalidate always, and returns 1 for positive
dentry. Now, we don't need to change ->d_op dynamically anymore,
so this just uses sb->s_root->d_op to set ->d_op.
- d_find_alias() may return DCACHE_DISCONNECTED dentry. It's not
the interesting dentry there. This checks it.
- Add missing LOOKUP_PARENT check. We don't need to drop the valid
negative dentry for (LOOKUP_CREATE | LOOKUP_PARENT) lookup.
- For consistent filename on creation path, this drops negative dentry
if we can't see intent.
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:47 +0000 (12:53 -0800)]
fat: use generic_file_llseek() for directory
Since fat_dir_ioctl() was already fixed (i.e. called under ->i_mutex),
and __fat_readdir() doesn't take BKL anymore. So, BKL for ->llseek()
is pointless, and we have to use generic_file_llseek().
OGAWA Hirofumi [Thu, 6 Nov 2008 20:53:47 +0000 (12:53 -0800)]
fat: Fix and cleanup timestamp conversion
This cleans date_dos2unix()/fat_date_unix2dos() up. New code should be
much more readable.
And this fixes those old functions. Those doesn't handle 2100
correctly. 2100 isn't leap year, but old one handles it as leap year.
Also, with this, centi sec is handled and is fixed.
Andrew Victor [Thu, 6 Nov 2008 20:53:42 +0000 (12:53 -0800)]
SAM9 watchdog: update for moved headers
The architecture header files were recently moved from
include/asm-arm/mach-at91/ to arch/arm/mach-at91/include/mach/. The SAM9
watchdog driver still includes a header from the old location.
Signed-off-by: Andrew Victor <linux@maxim.org.za> Cc: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Frans Pop [Thu, 6 Nov 2008 20:53:41 +0000 (12:53 -0800)]
rtc-cmos: fix boot log message
-rtc0: alarms up to one month, y3k, 114 bytes nvram, , hpet irqs irqs
+rtc0: alarms up to one month, y3k, 114 bytes nvram, hpet irqs
Signed-off-by: Frans Pop <elendil@planet.nl> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Brownell [Thu, 6 Nov 2008 20:53:40 +0000 (12:53 -0800)]
atmel_serial: keep clock off when it's not needed
The atmel_serial driver is mismanaging its clock by leaving it on at all
times ... the whole point of clock management is to leave it off unless
it's actively needed, which conserves power!!
Although the kernel doesn't actually hang without my fix, it does
discard quite a lot of early console output.
The result still looks correct:
usart users= 1 on 35000000 Hz, for atmel_usart.0
usart users= 0 off 35000000 Hz, for atmel_usart.2
when using ttyS0 as serial console.
[haavard.skinnemoen@atmel.com: Make sure clock is enabled early for console] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
commit 3e680aae4e53ab54cdbb0c29257dae0cbb158e1c ("fb: convert
lock/unlock_kernel() into local fb mutex") introduced several deadlocks
in the fb_compat_ioctl() path, as mutex_lock() doesn't allow recursion,
unlike lock_kernel(). This broke frame buffer applications on 64-bit
systems with a 32-bit userland.
This patch fixes the remaining deadlocks:
- Revert commit 120a37470c2831fea49fdebaceb5a7039f700ce6,
- Extract the core logic of fb_ioctl() into a new function do_fb_ioctl(),
- Change all callsites of fb_ioctl() where info->lock is already held to
call do_fb_ioctl() instead,
- Add sparse annotations to all routines that take info->lock.
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Gerald Schaefer [Thu, 6 Nov 2008 20:53:36 +0000 (12:53 -0800)]
memory hotplug: fix page_zone() calculation in test_pages_isolated()
My last bugfix here (adding zone->lock) introduced a new problem: Using
page_zone(pfn_to_page(pfn)) to get the zone after the for() loop is wrong.
pfn will then be >= end_pfn, which may be in a different zone or not
present at all. This may lead to an addressing exception in page_zone()
or spin_lock_irqsave().
Now I use __first_valid_page() again after the loop to find a valid page
for page_zone().
Arthur Jones [Thu, 6 Nov 2008 20:53:35 +0000 (12:53 -0800)]
ext3: wait on all pending commits in ext3_sync_fs
In ext3_sync_fs, we only wait for a commit to finish if we started it, but
there may be one already in progress which will not be synced.
In the case of a data=ordered umount with pending long symlinks which are
delayed due to a long list of other I/O on the backing block device, this
causes the buffer associated with the long symlinks to not be moved to the
inode dirty list in the second phase of fsync_super. Then, before they
can be dirtied again, kjournald exits, seeing the UMOUNT flag and the
dirty pages are never written to the backing block device, causing long
symlink corruption and exposing new or previously freed block data to
userspace.
This can be reproduced with a script created
by Eric Sandeen <sandeen@redhat.com>:
#!/bin/bash
umount /mnt/test2
mount /dev/sdb4 /mnt/test2
rm -f /mnt/test2/*
dd if=/dev/zero of=/mnt/test2/bigfile bs=1M count=512
touch
/mnt/test2/thisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongfilename
ln -s
/mnt/test2/thisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongfilename
/mnt/test2/link
umount /mnt/test2
mount /dev/sdb4 /mnt/test2
ls /mnt/test2/
umount /mnt/test2
To ensure all commits are synced, we flush all journal commits now when
sync_fs'ing ext3.
Signed-off-by: Arthur Jones <ajones@riverbed.com> Cc: Eric Sandeen <sandeen@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: <linux-ext4@vger.kernel.org> Cc: <stable@kernel.org> [2.6.everything] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: dann frazier <dannf@hp.com> Acked-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Li Zefan [Thu, 6 Nov 2008 20:53:32 +0000 (12:53 -0800)]
cgroups: fix invalid cgrp->dentry before cgroup has been completely removed
This fixes an oops when reading /proc/sched_debug.
A cgroup won't be removed completely until finishing cgroup_diput(), so we
shouldn't invalidate cgrp->dentry in cgroup_rmdir(). Otherwise, when a
group is being removed while cgroup_path() gets called, we may trigger
NULL dereference BUG.
The bug can be reproduced:
# cat test.sh
#!/bin/sh
mount -t cgroup -o cpu xxx /mnt
for (( ; ; ))
{
mkdir /mnt/sub
rmdir /mnt/sub
}
# ./test.sh &
# cat /proc/sched_debug
It really does not matter when we flush the lru. The system is free to
add pages onto the lru even during migration which will make the page
migration either skip the page (mbind, migrate_pages) or return a busy
state (move_pages).
Fixes this lockdep warning (and potential deadlock):
Some VM place has
mmap_sem -> kevent_wq via lru_add_drain_all()
net/core/dev.c::dev_ioctl() has
rtnl_lock -> mmap_sem (*) the ioctl has copy_from_user() and it can do page fault.
linkwatch_event has
kevent_wq -> rtnl_lock
Signed-off-by: Christoph Lameter <cl@linux-foundation.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Hugh Dickins <hugh@veritas.com> Cc: Rik van Riel <riel@redhat.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fbdev: add new framebuffer driver for Fujitsu MB862xx GDCs
Add a framebuffer driver for the Fujitsu Carmine/Coral-P(A)/Lime graphics
controllers. Lime GDC support is known to work on PPC440EPx based lwmon5
and MPC8544E based socrates embedded boards, both equipped with Lime GDC.
Carmine/Coral-P PCI GDC support is known to work on PPC440EPx based
Sequoia board and also on x86 platform.
Signed-off-by: Anatolij Gustschin <agust@denx.de> Cc: Dmitry Baryshkov <dbaryshkov@gmail.com> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Matteo Fortini <m.fortini@selcomgroup.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Rientjes [Thu, 6 Nov 2008 20:53:29 +0000 (12:53 -0800)]
oom: do not dump task state for non thread group leaders
When /proc/sys/vm/oom_dump_tasks is enabled, it's only necessary to dump
task state information for thread group leaders. The kernel log gets
quickly overwhelmed on machines with a massive number of threads by
dumping non-thread group leaders.
Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andy Whitcroft [Thu, 6 Nov 2008 20:53:27 +0000 (12:53 -0800)]
hugetlb: pull gigantic page initialisation out of the default path
As we can determine exactly when a gigantic page is in use we can optimise
the common regular page cases by pulling out gigantic page initialisation
into its own function. As gigantic pages are never released to buddy we
do not need a destructor. This effectivly reverts the previous change to
the main buddy allocator. It also adds a paranoid check to ensure we
never release gigantic pages from hugetlbfs to the main buddy.
Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Jon Tollefson <kniht@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andy Whitcroft [Thu, 6 Nov 2008 20:53:26 +0000 (12:53 -0800)]
hugetlbfs: handle pages higher order than MAX_ORDER
When working with hugepages, hugetlbfs assumes that those hugepages are
smaller than MAX_ORDER. Specifically it assumes that the mem_map is
contigious and uses that to optimise access to the elements of the mem_map
that represent the hugepage. Gigantic pages (such as 16GB pages on
powerpc) by definition are of greater order than MAX_ORDER (larger than
MAX_ORDER_NR_PAGES in size). This means that we can no longer make use of
the buddy alloctor guarentees for the contiguity of the mem_map, which
ensures that the mem_map is at least contigious for maximmally aligned
areas of MAX_ORDER_NR_PAGES pages.
This patch adds new mem_map accessors and iterator helpers which handle
any discontiguity at MAX_ORDER_NR_PAGES boundaries. It then uses these to
implement gigantic page versions of copy_huge_page and clear_huge_page,
and to allow follow_hugetlb_page handle gigantic pages.
Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Jon Tollefson <kniht@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch fixes a regression where the controller firmware version is not
displayed in procfs. The previous patch would be called anytime something
changed. This will get called only once for each controller.
Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch fixes a broken symlink in sysfs that was introduced by the
above commit. We broke it in 2.6.27-rc on or about 20080804. Some
installers are broken if this symlink does not exist and they may not
detect the logical drives configured on the controller. It does not
require being backported into 2.6.26.x or earlier kernels.
Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ian Kent [Thu, 6 Nov 2008 20:53:23 +0000 (12:53 -0800)]
autofs4: collect version check return
The function check_dev_ioctl_version() returns an error code upon fail but
it isn't captured and returned in validate_dev_ioctl() as it should be.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ian Kent [Thu, 6 Nov 2008 20:53:22 +0000 (12:53 -0800)]
autofs4: correct offset mount expire check
When checking a directory tree in autofs_tree_busy() we can incorrectly
decide that the tree isn't busy. This happens for the case of an active
offset mount as autofs4_follow_mount() follows past the active offset
mount, which has an open file handle used for expires, causing the file
handle not to count toward the busyness check.
Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Henrik Rydberg [Thu, 6 Nov 2008 20:53:20 +0000 (12:53 -0800)]
hwmon: applesmc: add support for Macbook 5
Add accelerometer, backlight and temperature sensor support for the new
unibody Macbook 5.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Tested-by: David M. Lary <dmlary@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mark Brown [Thu, 6 Nov 2008 20:53:18 +0000 (12:53 -0800)]
rtc: fix handling of missing tm_year data when reading alarms
When fixing up invalid years rtc_read_alarm() was calling rtc_valid_tm()
as a boolean but rtc_valid_tm() returns zero on success or a negative
number if the time is not valid so the test was inverted.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Problem 1 (see patch below):
vc_tab_stop is declared as an array of 8 unsigned ints in struct
vc_data in include/linux/console_struct.h .
In drivers/char/vt.c only 5 of these 8 unsigned ints get initialized
leading to unintended tabulator placement on displays with more than
160 columns text.
Problem 2 (open):
Upcoming displays will have more than 256 columns of text leading to
invalid memory access in drivers/char/vt.c during tabulator
calculations:
if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
break;
Signed-off-by: Wolfgang Kroworsch <wolfgang@kroworsch.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Miller [Thu, 6 Nov 2008 08:37:40 +0000 (00:37 -0800)]
net: Fix recursive descent in __scm_destroy().
__scm_destroy() walks the list of file descriptors in the scm_fp_list
pointed to by the scm_cookie argument.
Those, in turn, can close sockets and invoke __scm_destroy() again.
There is nothing which limits how deeply this can occur.
The idea for how to fix this is from Linus. Basically, we do all of
the fput()s at the top level by collecting all of the scm_fp_list
objects hit by an fput(). Inside of the initial __scm_destroy() we
keep running the list until it is empty.
Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Zhu, Yi [Tue, 4 Nov 2008 20:21:36 +0000 (12:21 -0800)]
iwl3945: fix deadlock on suspend
This patch fixes iwl3945 deadlock during suspend by moving notify_mac out
of iwl3945 mutex. This is a portion of the same fix for iwlwifi by Tomas.
Signed-off-by: Zhu Yi <yi.zhu@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reinette Chatre [Tue, 4 Nov 2008 20:21:35 +0000 (12:21 -0800)]
iwl3945: do not send scan command if channel count zero
Do not send scan command if no channels to scan.
This avoids a Microcode error as reported in:
http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1650
http://bugzilla.kernel.org/show_bug.cgi?id=11806
http://marc.info/?l=linux-wireless&m=122437145211886&w=2
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Mohamed Abbas [Tue, 4 Nov 2008 20:21:34 +0000 (12:21 -0800)]
iwl3945: clear scanning bits upon failure
This patch ensures we clear any scan status bit when
an error occurs while sending the scan command. It is
the implementation of patch:
"iwlwifi: clear scanning bits upon failure"
for iwl3945.
Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Bob Copeland [Tue, 4 Nov 2008 03:14:00 +0000 (22:14 -0500)]
ath5k: correct handling of rx status fields
ath5k_rx_status fields rs_antenna and rs_more are u8s, but we
were setting them with bitwise ANDs of 32-bit values.
As a consequence, jumbo frames would not be discarded as intended.
Then, because the hw rate value of such frames is zero, and, since
"ath5k: rates cleanup", we do not fall back to the basic rate, such
packets would trigger the following WARN_ON:
> I'll have a prod at why the [hso] rfkill stuff isn't working next
Ok, I believe this is due to the addition of rfkill_check_duplicity in
rfkill and the fact that test_bit actually returns a negative value
rather than the postive one expected (which is of course equally true).
So when the second WLAN device (the hso device, with the EEE PC WLAN
being the first) comes along rfkill_check_duplicity returns a negative
value and so rfkill_register returns an error. Patch below fixes this
for me.
Signed-Off-By: Jonathan McDowell <noodles@earth.li> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Avoid the sleep by changing iwl_scan_cancel_timeout with
iwl_scan_cancel and simply returning on failure if the scan persists.
This will cause hardware decryption to fail and we'll handle a few more
frames with software decryption.
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Mohamed Abbas [Fri, 24 Oct 2008 06:48:54 +0000 (23:48 -0700)]
iwlwifi: clear scanning bits upon failure
In iwl_bg_request_scan function, if we could not send a
scan command it will go to done.
In done it does the right thing to call mac80211 with
scan complete, but the problem is STATUS_SCAN_HW is still
set causing any future scan to fail. Fix by clearing the scanning status
bits if scan fails.
Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
projects / mirror_ubuntu-eoan-kernel.git / log