James Bottomley [Wed, 20 Sep 2006 16:00:18 +0000 (12:00 -0400)]
[SCSI] SPI transport class: misc DV fixes
Key more of the domain validation settings off the inquiry data from
the disk (in particular, don't try IU or DT unless the disk claims to
support them.
Also add a new dv_in_progress flag to prevent recursive DV.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Alan Cox [Mon, 18 Sep 2006 18:18:34 +0000 (19:18 +0100)]
[SCSI] eata_pio cleanup and PCI fix
This started as a PCI reference fixup but to do that I need to build it,
to build it I need to fix it and its full of 32bitisms and uglies.
It has been resurrected, I'm not sure if this is a thank you for the
work on the license stuff or punishment for some unknown misdeed however
8). I've also fixed a memory scribble in the init code.
One oddity - the changes from HZ * to constants are deliberate. Whoever
originally wrote the code (or cleaned it up) used HZ for a cycle timing
loop even though is not HZ related. I've put it back to the counts used
in the old days when the driver was most used.
Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Mark Haverkamp [Tue, 19 Sep 2006 16:00:39 +0000 (09:00 -0700)]
[SCSI] aacraid: README update
Received from Mark Salyzyn:
This patch to the driver's documentation adds a few new product entries,
sorts the entries on OEM lines first for easy searching, followed by
product id order to make it easier to compare against the open source
pci list. The driver has 'family match' so is somewhat future proof, no
code changes are required to recognize the new products.
Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Mark Haverkamp [Tue, 19 Sep 2006 16:00:18 +0000 (09:00 -0700)]
[SCSI] aacraid: remove scsi_remove_device
Received from Mark Salyzyn:
Until the system is stabilized, I am suggesting the enclosed
modification to prevent the driver from tickling the panic. Once sysfs
and friends are stabilized, the patch may be backed out. We have yet to
evaluate if we really want to relinquish existing Scsi Devices in any
case, holding on to them as configuration of arrays comes and goes makes
some sense as well. As a result, we have opted to pull the lines rather
than comment them in legacy.
Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Mark Haverkamp [Tue, 19 Sep 2006 16:00:02 +0000 (09:00 -0700)]
[SCSI] aacraid: merge rx and rkt code
Received from Mark Salyzyn:
The only real difference between the rkt and rx platform modules is the
offset of the message registers. This patch recognizes this similarity
and simplifies the driver to reduce it's code footprint and to improve
maintainability by reducing the code duplication.
Visibly, the 'rkt.c' portion of this patch looks more complicated than
it really is. View it as retaining the rkt-only specifics of the
interface.
Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Mark Haverkamp [Tue, 19 Sep 2006 15:59:43 +0000 (08:59 -0700)]
[SCSI] aacraid: expose physical devices
Received from Mark Salyzyn:
I am placing this functionality into an insmod parameter. Normally the physical
components are exported to sg, and are blocked from showing up in sd.
Note that the pass-through I/O path via the driver through the Firmware to the
physical disks is not an optimized path, the card is designed for Hardware
RAID, elevator sorting and caching. This should not be used as a means for
utilizing the aacraid based controllers as a generic scsi/SATA/SAS controller,
performance should suck by a few percentage points, any RAID meta-data on the
drives will confuse the controller about who owns the drives and there is a
high risk of destroying content in both directions. Unreliable and for
experimentation or strange controlled circumstances only.
Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Andreas Herrmann [Mon, 18 Sep 2006 20:30:36 +0000 (22:30 +0200)]
[SCSI] zfcp: fix: avoid removal of fsf reqs before qdio queues are down
Fix the fix ... One of my previous fixes introduced removal of all fsf
requests in zfcp's eh_host_reset_handler. But this must not happen
before qdio queues are shut down. So, I revert the changes of
zfcp_scsi_eh_host_reset_handler.
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Andreas Herrmann [Mon, 18 Sep 2006 20:29:20 +0000 (22:29 +0200)]
[SCSI] zfcp: fix: use correct req_id in eh_abort_handler
zfcp's eh_abort_handler used the wrong request ID to
identify the request to be aborted. The bug was introduced
with commit fea9d6c7bcd8ff1d60ff74f27ba483b3820b18a3
for improved management of request IDs. The bug is
fixed with this patch.
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
[SCSI] aic7xxx: pause sequencer before touching SBLKCTL
Some cards need to pause the sequencer before the SBLKCTL register is
touched. This fixes a PCI related oops seen on powerpc macs with this
card caused by trying to ascertain the bus signalling before beginning
domain validation.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
James Bottomley [Wed, 6 Sep 2006 14:04:40 +0000 (09:04 -0500)]
[SCSI] aic7xxx: avoid checking SBLKCTL register for certain cards
For cards that don't support LVD, checking the SBLKCTL register to
determine the bus singalling doesn't work. So, check that the card
supports LVD first (AHC_ULTRA2) before checking the register.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Douglas Gilbert [Sun, 17 Sep 2006 00:30:47 +0000 (20:30 -0400)]
[SCSI] scsi_debug version 1.80
See http://www.torque.net/sg/sdebug26.html for more
information on the scsi_debug driver.
ChangeLog:
- add 'vpd_use_hostno' parameter to allow simulated hosts
to see the same set of targets (and luns). For testing
multipath software.
- add 'fake_rw' parameter to ignore the data in READ and
WRITE commands
- add support for log subpages (new in SPC-4)
- yield appropriate block descriptor for MODE SENSE
commands (only for pdt=0 (i.e. disks))
- REQUEST SENSE response no longer shows the stopped
power condition (SAT changed to agree with SPC-3)
Signed-off-by: Douglas Gilbert <dougg@torque.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
[SCSI] megaraid: Make megaraid_ioctl() check copy_to_user() return value
Check copy_to_user() return value in drivers/scsi/megaraid.c::megadev_ioctl()
This gets rid of this little warning:
drivers/scsi/megaraid.c:3661: warning: ignoring return value of 'copy_to_user', declared with attribute warn_unused_result
James Bottomley [Thu, 14 Sep 2006 22:04:58 +0000 (17:04 -0500)]
[SCSI] aha152x: remove static host array
Fix this driver not to use a static two element host array instead use
a list. This should fix panic on multiple eject reinsert of the
pcmcia version of this device.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
[CIFS] statfs for cifs unix extensions no longer experimental
[CIFS] New POSIX locking code not setting rc properly to zero on successful
[CIFS] Support deep tree mounts (e.g. mounts to //server/share/path)
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
[CPUFREQ] sw_any_bug_dmi_table can be used on resume, so it isn't initdata
[CPUFREQ] Fix some more CPU hotplug locking.
[CPUFREQ] Workaround for BIOS bug in software coordination of frequency
[CPUFREQ] Longhaul - Add voltage scaling to driver
[CPUFREQ] Fix sparse warning in ondemand
[CPUFREQ] make drivers/cpufreq/cpufreq_ondemand.c:powersave_bias_target() static
[CPUFREQ] Longhaul - Add ignore_latency option
[CPUFREQ] Longhaul - Disable arbiter
[CPUFREQ][2/2] ondemand: updated add powersave_bias tunable
[CPUFREQ][1/2] ondemand: updated tune for hardware coordination
[CPUFREQ] Fix typo.
Al Viro [Sat, 23 Sep 2006 00:26:02 +0000 (01:26 +0100)]
[PATCH] sun4: fix sbus_setup_iommu()
iommu_init() and iounit_init() are never called for sun4, but that's not
enough - these calls should be ifdefed out since the functions in question
simply do not exist for CONFIG_SUN4 kernel.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Al Viro [Sat, 23 Sep 2006 00:18:41 +0000 (01:18 +0100)]
[PATCH] fix ancient breakage in ebus_init()
Back when pci_dev had base_address[], loop of form
base = &...->base_address[0];
for (.....) {
...
*base++ = addr;
}
was fine, but when that array got spread in ->resource[...].start
replacing the initialization with
base = &...->resource[0].start;
was not a sufficient modification. IOW this code got broken for cases
when there had been more than one resource to fill. All way back in
2.3.41-pre3...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Al Viro [Fri, 22 Sep 2006 23:10:18 +0000 (00:10 +0100)]
[PATCH] fix missing ifdefs in syscall classes hookup for generic targets
several targets have no ....at() family and m32r calls its only chown variant
chown32(), with __NR_chown being undefined. creat(2) is also absent in some
targets.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
As there are other places that call cpufreq_update_policy without
the hotplug lock, it seems better to keep the hotplug locking
at the lower level for the time being until this is revamped.
Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: (65 commits)
IB: Fix typo in kerneldoc for ib_set_client_data()
IPoIB: Add some likely/unlikely annotations in hot path
IPoIB: Remove unused include of vmalloc.h
IPoIB: Rejoin all multicast groups after a port event
IPoIB: Create MCGs with all attributes required by RFC
IB/sa: fix ib_sa_selector names
IB/iser: INFINIBAND_ISER depends on INET
IB/mthca: Simplify calls to mthca_cq_clean()
RDMA/cma: Document rdma_accept() error handling
IB/mthca: Recover from catastrophic errors
RDMA/cma: Document rdma_destroy_id() function
IB/cm: Do not track remote QPN in timewait state
IB/sa: Require SA registration
IPoIB: Refactor completion handling
IB/iser: Do not use FMR for a single dma entry sg
IB/iser: fix some debug prints
IB/iser: make FMR "page size" be 4K and not PAGE_SIZE
IB/iser: Limit the max size of a scsi command
IB/iser: fix a check of SG alignment for RDMA
RDMA/cma: Protect against adding device during destruction
...
Eli Cohen [Fri, 22 Sep 2006 22:22:56 +0000 (15:22 -0700)]
IPoIB: Rejoin all multicast groups after a port event
When ipoib_ib_dev_flush() is called because of a port event, the
driver needs to rejoin all multicast groups, since the flush will call
ipoib_mcast_dev_flush() (via ipoib_ib_dev_down()). Otherwise no
(non-broadcast) multicast groups will be rejoined until the networking
core calls ->set_multicast_list again, and so multicast reception will
be broken for potentially a long time.
Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Roland Dreier [Fri, 22 Sep 2006 22:22:56 +0000 (15:22 -0700)]
IPoIB: Create MCGs with all attributes required by RFC
RFC 4391 ("Transmission of IP over InfiniBand (IPoIB)") says:
If the IB multicast group does not already exist, one must be
created first with the IPoIB link MTU. The MGID MUST use the same
P_Key, Q_Key, SL, MTU, and HopLimit as those used in the
broadcast-GID. The rest of attributes SHOULD follow the values used
in the broadcast-GID as well.
However, the current IPoIB driver is only setting the attributes
required by the InfiniBand spec to create a multicast group, so in
particular the MTU and HopLimit are not being set. Add these
attributes when creating MCGs, and also set the Rate attribute, since
IPoIB pays attention to that attribute as well.
Relevant SA queries are actually "greater than" / "less than", not
"greater than or equal" / "less than or equal" as the names imply.
(See IB spec 1.2 Vol 1, 15.2.5.16 PATHRECORD/Table 205 PathRecord)
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Roland Dreier [Fri, 22 Sep 2006 22:22:55 +0000 (15:22 -0700)]
IB/mthca: Simplify calls to mthca_cq_clean()
If a QP has separate send and receive CQs, then the send CQ will never
have receive completions from that QP in it. So when cleaning the
send CQ, there's no need to pass in an SRQ pointer, even if the QP is
attached to an SRQ.
Jack Morgenstein [Tue, 15 Aug 2006 18:11:18 +0000 (21:11 +0300)]
IB/mthca: Recover from catastrophic errors
Trigger device remove and then add when a catastrophic error is
detected in hardware. This, in turn, will cause a device reset, which
we hope will recover from the catastrophic condition.
Since this might interefere with debugging the root cause, add a
module option to suppress this behaviour.
Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Require users to register with SA module, to prevent the sa_query
module text from going away while an SA query callback is still
running. Update all in-tree users for the new interface.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Roland Dreier [Fri, 22 Sep 2006 22:22:52 +0000 (15:22 -0700)]
IPoIB: Refactor completion handling
Split up ipoib_ib_handle_wc() into ipoib_ib_handle_rx_wc() and
ipoib_ib_handle_tx_wc() to make the code easier to read. This will
also help implement NAPI in the future.
IB/iser: make FMR "page size" be 4K and not PAGE_SIZE
As iser is able to use at most one rdma operation for the
execution of a scsi command, and registration of the sg
associated with scsi command has its restrictions, the code
checks if an sg is "aligned for rdma".
Alignment for rdma is measured in "fmr page" units whose
possible resolutions are different between HCAs and can be
smaller, equal or bigger to the system page size.
When the system page size is bigger than 4KB (eg the default
with ia64 kernels) there a bigger chance that an sg would be
aligned for rdma if the fmr page size is 4KB.
Change the code to create FMR whose pages are of size 4KB
and to take that into account when processing the sg.
Signed-off-by: Erez Zilber <erezz@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Currently, the data length of a command coming down from scsi-ml
is limited only by the size of its sg list (sg_tablesize). The
max data length may be different for different page size values.
By setting max_sectors, we limit the data length to
max_sectors*512 bytes.
Signed-off-by: Erez Zilber <erezz@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
dma mapping may include a "compaction" of the sg associated with scsi command.
Hence, the size of the maximal prefix of the SG which is aligned for rdma must be
compared against the length of the dma mapped sg (mem->dma_nents) and not against
the size of it before it was mapped (mem->size).
Signed-off-by: Erez Zilber <erezz@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Sean Hefty [Fri, 1 Sep 2006 22:33:55 +0000 (15:33 -0700)]
RDMA/cma: Protect against adding device during destruction
Closes a window where address resolution can attach an rdma_cm_id to a
device during destruction of the rdma_cm_id. This can result in the
rdma_cm_id remaining in the device list after its memory has been
freed.
Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Tom Tucker [Fri, 22 Sep 2006 22:22:48 +0000 (15:22 -0700)]
RDMA/amso1100: Add driver for Ammasso 1100 RNIC
Add a driver for the Ammasso 1100 gigabit ethernet RNIC.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Tom Tucker [Thu, 3 Aug 2006 21:02:42 +0000 (16:02 -0500)]
RDMA: iWARP Core Changes.
Modifications to the existing rdma header files, core files, drivers,
and ulp files to support iWARP, including:
- Hook iWARP CM into the build system and use it in rdma_cm.
- Convert enum ib_node_type to enum rdma_node_type, which includes
the possibility of RDMA_NODE_RNIC, and update everything for this.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Tom Tucker [Thu, 3 Aug 2006 21:02:40 +0000 (16:02 -0500)]
RDMA: iWARP Connection Manager.
Add an iWARP Connection Manager (CM), which abstracts connection
management for iWARP devices (RNICs). It is a logical instance of the
xx_cm where xx is the transport type (ib or iw). The symbols exported
are used by the transport independent rdma_cm module, and are
available also for transport dependent ULPs.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
James Lentini [Mon, 28 Aug 2006 22:12:04 +0000 (15:12 -0700)]
IB/mad: Remove unused includes
The ib_mad module does not use a kthread function, but mad_priv.h
includes <linux/kthread.h>. mad_rmpp.c does not do any DMA-related
stuff, but includes <linux/dma-mapping.h>. Remove the unused includes.
Signed-off-by: James Lentini <jlentini@netapp.com> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Sean Hefty [Mon, 28 Aug 2006 22:10:32 +0000 (15:10 -0700)]
IB/mad: Add support for dual-sided RMPP transfers.
The implementation assumes that any RMPP request that requires a
response uses DS RMPP. Based on the RMPP start-up scenarios defined
by the spec, this should be a valid assumption. That is, there is no
start-up scenario defined where an RMPP request is followed by a
non-RMPP response. By having this assumption we avoid any API
changes.
In order for a node that supports DS RMPP to communicate with one that
does not, RMPP responses assume a new window size of 1 if a DS ACK has
not been received. (By DS ACK, I'm referring to the turn-around ACK
after the final ACK of the request.) This is a slight spec deviation,
but is necessary to allow communication with nodes that do not
generate the DS ACK. It also handles the case when a response is sent
after the request state has been discarded.
Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Sean Hefty [Mon, 28 Aug 2006 18:57:42 +0000 (11:57 -0700)]
IB/cm: Use correct reject code for invalid GID
Set the reject code properly when rejecting a request that contains an
invalid GID. A suitable GID is returned by the IB CM in the
additional reject information (ARI). This is a spec compliancy issue.
Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Bryan O'Sullivan [Fri, 25 Aug 2006 18:24:34 +0000 (11:24 -0700)]
IB/ipath: remove stale references to userspace SMA
When we first submitted a userspace subnet management agent, it was
rejected, so we left it out of the final driver submission. This patch
removes a number of vestigial references to it.
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Bryan O'Sullivan [Fri, 25 Aug 2006 18:24:32 +0000 (11:24 -0700)]
IB/ipath: simplify layering code
A lot of ipath layer code was only called in one place. Now that the
ipath_core and ib_ipath drivers are merged, it's more sensible to simply
inline the simple stuff that the layer code was doing.
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Bryan O'Sullivan [Fri, 25 Aug 2006 18:24:29 +0000 (11:24 -0700)]
IB/ipath: fix handling of kpiobufs
Change comment: no longer imply that user can set ipath_kpiobufs to zero.
Actually set ipath_kpiobufs from parameter. Previously only altered
per-device ipath_lastport_piobuf, which was over-written in chip init.
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Bryan O'Sullivan [Fri, 25 Aug 2006 18:24:26 +0000 (11:24 -0700)]
IB/ipath: More changes to support InfiniPath on PowerPC 970 systems
Ordering of writethrough store buffers needs to be forced, and we need
to use ifdef to get writethrough behavior to InfiniPath buffers, because
there is no generic way to specify that at this time (similar to code
in char/drm/drm_vm.c and block/z2ram.c).
Signed-off-by: John Gregor <john.gregor@qlogic.com> Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Ralph Campbell [Fri, 22 Sep 2006 22:22:26 +0000 (15:22 -0700)]
IB/ipath: Performance improvements via mmap of queues
Improve performance of userspace post receive, post SRQ receive, and
poll CQ operations for ipath by allowing userspace to directly mmap()
receive queues and completion queues. This eliminates the copying
between userspace and the kernel in the data path.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Ralph Campbell [Fri, 11 Aug 2006 21:58:09 +0000 (14:58 -0700)]
IB/uverbs: Pass userspace data to modify_srq and modify_qp methods
Pass a struct ib_udata to the low-level driver's ->modify_srq() and
->modify_qp() methods, so that it can get to the device-specific data
passed in by the userspace driver.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Ralph Campbell [Fri, 22 Sep 2006 22:22:24 +0000 (15:22 -0700)]
IB/uverbs: Allow resize CQ operation to return driver-specific data
Add a ib_uverbs_resize_cq_resp.driver_data field so that low-level
drivers can return data from a resize CQ operation to userspace. Have
ib_uverbs_resize_cq() only copy the cqe field, to avoid having to bump
the userspace ABI.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Ishai Rabinovitz [Tue, 15 Aug 2006 14:34:52 +0000 (17:34 +0300)]
IB/srp: Add port/device attributes
Add local_ib_device and local_ib_port attributes to srp scsi_host.
These are needed when we want to connect to the same target through
multiple distinct ports.
Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Roland Dreier [Fri, 22 Sep 2006 22:17:20 +0000 (15:17 -0700)]
IB/uverbs: Fix lockdep warning when QP is created with 2 CQs
Lockdep warns when userspace creates a QP that uses different CQs for
send completions and receive completions, because both CQs are locked
and their mutexes belong to the same lock class. However, we know
that the mutexes are distinct and the nesting is safe (there is no
possibility of AB-BA deadlock because the mutexes are locked with
down_read()), so annotate the situation with SINGLE_DEPTH_NESTING to
get rid of the lockdep warning.
projects / mirror_ubuntu-eoan-kernel.git / log