Alex Elder [Tue, 18 Nov 2014 19:26:54 +0000 (13:26 -0600)]
greybus: pass gfp_flags for message allocation
The only reason gb_operation_message_init() gets its "outbound"
argument is so we can determine what allocation flags to use.
Just pass the flags in directly instead.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:53 +0000 (13:26 -0600)]
greybus: stop storing dest_cport_id in message
We can derive the destination CPort id of any (outbound) message
from the connection it's operation is associated with. So we don't
need to store that information in every message.
As a result, we no longer need to record it at message initialization
time.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:52 +0000 (13:26 -0600)]
greybus: stop storing hd in message
The host device pointer doesn't have to be stored in every message.
It can be derived by following up the chain of pointers back to
the operation's connection.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:51 +0000 (13:26 -0600)]
greybus: kill the last gbuf remnants
All the code has now been adjusted such that we can do away with the
old gbuf structure.
Three unused references remained in "greybus.h", so those are deleted.
Other than that most of the changes were done by simple global
substitution. The gb_message structure incorporates the fields that
were previously found its embedded gbuf structure. A few names have
been changed in the process:
gbuf->transfer_buffer message->buffer
gbuf->transfer_buffer_size message->buffer_size
gbuf->hcd_data; message->cookie
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:50 +0000 (13:26 -0600)]
greybus: rework receve handling
Rework gb_connection_operation_recv() to be more oriented toward an
operation message, and to no longer use a struct gbuf local variable.
Rename it to be a little more wieldy.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:46 +0000 (13:26 -0600)]
greybus: send buffers without gbufs
Change the method that sends messages so that it sends "raw" buffers
rather than gbufs. To do this, we supply the host device and
destination CPort when sending. As with other recent patches,
change the name of the method to reflect that we're no longer
dealing with gbufs.
The interface has changed as well. Now this routine will return a
"cookie" value. The cookie is used to represent the outgoing
request, and is supplied by the caller if necessary to cancel a
previously-sent buffer. We'll store the result in gbuf->hcd_data
for now (which produces the same result as before...).
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:45 +0000 (13:26 -0600)]
greybus: stash hd as context for all URBs
This changes the context value stashed with each USB URB so that it
is always the host device pointer.
In cport_out_callback() this allows us to get away with *not*
requiring the gbuf for handling completions any more. We are
(currently) ignoring the gbuf status value returned anyway, so
we'll skip setting it altogether.
Greg's comments in cport_out_callback() point out that ignoring
this was misguided, and handling send errors will be put in
place in an upcoming patch.
The context is set to the host device pointer for SVC receive and
CPort receive URBs for consistency--because we can.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:44 +0000 (13:26 -0600)]
greybus: cancel buffers via magic cookie
Change the interface for canceling in-flight buffers to take a magic
cookie value as argument rather than a gbuf. Right now we pass the
gbuf->hcd_data pointer that's assumed to have been set by the submit
routine. But the next patch will change the submit routine to
return the cookie to be used, and the caller will be responsible for
keeping track of it.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:42 +0000 (13:26 -0600)]
greybus: allocate space without gbufs
This begins the transition to buffer allocation that does not rely
on the gbuf construct.
The host driver allocation routine will return a pointer to the
buffer to be used, and the caller will be responsible for keeping
track of that pointer, as well as the requested buffer size.
Rename the allocation method to reflect it's no longer tied to a
gbuf.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:41 +0000 (13:26 -0600)]
greybus: fill in destination data at send time
For ES1 we need to insert the destination CPort id before the data
to be sent over UniPro. Currently this is done at the time the
buffer is created, but there's no need to do so until we're actually
going to send the content of the buffer.
Move the setting of that destination information into submit_gbuf().
Note that this allows us to defer initializing a few other gbuf
fields until after we know the buffer allocation has succeeded.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:40 +0000 (13:26 -0600)]
greybus: improve data buffer alignment
For ES1 we need to insert the destination CPort id in whatever we
supply for sending over UniPro. Currently we allocate one extra
byte supply the caller with an address that's offset by one from
the beginning of the allocated space.
As a result we always return a poorly-aligned buffer pointer.
Instead, allocate enough space so that we can return a better
aligned buffer to the caller.
Notes:
- It may be that it's more important to supply an aligned
address to the hardware.
- We probably need to be more careful about writing into
these buffers at unaligned offsets anyway. (E.g., writing
a 2-byte value at an odd offset can't be assumed to work.)
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:39 +0000 (13:26 -0600)]
greybus: prepend cport byte for all gbufs
Treat communication buffers for both inbound and outbound data the
same way, prepending a "destination cport id" byte before the data
in the buffer. Currently this is done only for outbound data
buffers.
This isn't needed for inbound data, but handling it this way
allows the free routine to work without knowing whether the
buffer was used for sending or receiving.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 19:26:38 +0000 (13:26 -0600)]
greybus: fix an allocation flag bug
We allocate message buffers with GFP_KERNEL allocation flags if
possible. However when an incoming request message is received we
can be in interrupt context, so we must use GFP_ATOMIC in that case.
The computation of gfp_flags in gb_operation_message_init() is
wrong. It is needlessly using GFP_ATOMIC when allocating outbound
response buffers. Fix the flawed logic.
Change the name of "data_out" to be "outbound" to be consistent with
usage elsewhere. (Data/messages are "inbound" or "outbound";
requests are "incoming" or "outgoing".)
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:34 +0000 (18:08 -0600)]
greybus: use null gbuf->transfer_buffer
Make sure gbuf->transfer_buffer gets reset to NULL when the buffer
is freed. We can leverage that to do a little extra error checking.
We'll also use a null transfer buffer in the next patch to indicate
an unused gbuf.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:33 +0000 (18:08 -0600)]
greybus: move gbuf initialization to caller
Change greybus_alloc_gbuf() so all it does is allocate the gbuf data
structure. Move all of the initialization of the gbuf structure in
the caller. Do the inverse in the caller prior to freeing the gbuf
structure via greybus_free_gbuf(). Use a null gbuf->transfer_buffer
pointer rather than a null gbuf pointer to indicate an unused gbuf.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:32 +0000 (18:08 -0600)]
greybus: start using struct gb_message
This converts some of the operation code to start leveraging the
new gb_message type. Instead of creating the request and response
gbufs, we initialize (and tear down with a new function) the
request and response message structures.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:31 +0000 (18:08 -0600)]
greybus: define struct gb_message
A Greybus buffer (gbuf) is a generic buffer used for data transfer
over a Greybus interconnect. We only ever use gbufs in operations,
which always involve exactly two of them. The lifetime of a gbuf is
therefore directly connected to the lifetime of an operation, so
there no real need to manage gbufs separate from operations.
This patch begins the process of removing the gbuf abstraction, on
favor of a new data type, gb_message. The purpose of a gb_message
is--like a gbuf--to represent data to be transferred over Greybus.
However a gb_message is oriented toward the more restrictive way
we do Greybus transfers--as operation messages (either a request or
a response).
This patch simply defines the structure in its initial form, and
defines the request and response fields in a Greybus operation
structure as embedded instances of that type. The gbuf pointer
is defined within the gb_message structure, and as a result lots
of code needs to be tweaked to reference the request and response
gbufs as subfields of the request and response structures.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:30 +0000 (18:08 -0600)]
greybus: move the definition of struct gbuf
We no longer need struct gbuf defined in "greybus.h". An upcoming
patch will embed a gbuf struct (not a pointer) into the operation
structure, and to do that we'll need the struct defined prior to the
operation. Just move the gbuf definition into "operation.h".
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:29 +0000 (18:08 -0600)]
greybus: kill gbuf->kref
Since there is only ever one reference to a gbuf, we don't need a
kref to figure out when it can be freed. Get rid of the kref and
its supporting code.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Tue, 18 Nov 2014 00:08:28 +0000 (18:08 -0600)]
greybus: kill greybus_{get,put}_gbuf()
These functions are never used, so we can get rid of them.
Since there's no reference-getting function any more, we no
longer need "gbuf_mutex" to avoid racing gets and puts, so
get rid of that too.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
This driver implements the Greybus vibrator protocol, as defined in the
Greybus protocol specification. It interacts to userspace with a single
sysfs file, "timeout", and a separate "class" called "vibrator". That
interface can/should be changed in the future depending on what Android
wants for its HAL, but for now should be good enough to test with.
There are some changes needed to kernel_ver.h to support some
sysfs/driver core changes that happened after the 3.10 kernel was
released to try to make the code simpler. Even with those changes,
there are #ifdefs in the code to do different things depending on the
kernel version to implement the same userspace api.
greybus: greybus_manifest.h: update with full list of protocols
The protocol values had gotten out of sync with the Greybus Protocol
specification document, so bring them back into sync by changing a few
values, and adding the missing values.
Alex Elder [Mon, 17 Nov 2014 14:08:45 +0000 (08:08 -0600)]
greybus: get rid of cport_id_map_lock
The only time we get a cport id is when setting up a new connection.
We already have a (coarser-grained) spin lock that's used to protect
the connection lists, and we can use that same lock for protecting
the hd's connection id map.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Mon, 17 Nov 2014 14:08:44 +0000 (08:08 -0600)]
greybus: use a simple list of hd connections
First of all, there's a bug in _gb_hd_connection_insert, which
Viresh found. But pointing out that problem just called attention
to the fact that I have planning to to remove the affected block of
code.
The set of connections associated with a host device is currently
maintained in a red-black tree. The number of connections we're
likely to have is on the order of a hundred, and at least for now
isn't even going to approach that. When this code first went in,
Greg asserted that using a list is speedier than a red-black tree
for smallish numbers of elements (maybe up to a few hundred?).
So this patch just removes the host device's red-black tree of
connections, using a simple list instead.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Mon, 17 Nov 2014 14:08:42 +0000 (08:08 -0600)]
greybus: use gbuf's destination cport id
If the buffer allocated in the ES1 alloc_gbuf_data() routine is for
outbound data, we are getting the destination CPort id from the
connection. Switch to using the copy of the destination cport id
we now have in the gbuf instead.
Check for a valid CPort id there only if we're inserting it into
the buffer.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Mon, 17 Nov 2014 14:08:41 +0000 (08:08 -0600)]
greybus: record a gbuf's destination CPort id
Rather than indicating whether a gbuf is intended for outbound data,
record its destination CPort id. That's what's really needed by
the ES1 host driver. Use CPORT_ID_BAD when the buffer is intended
for inbound data.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Mon, 17 Nov 2014 14:08:39 +0000 (08:08 -0600)]
greybus: clean up gb_connection_operation_recv()
This patch does some cleanup of gb_connection_operation_recv().
- Improve the header comments
- Verify message is big enough for header before interpreting
beginning of the message as a header
- Verify at buffer creation time rather than receive time that
no operation buffer is bigger than the maximum allowed. We
can then compare the incoming data size against the buffer.
- When a response message arrives, record its status in the
operation result, not in the buffer status.
- Record a buffer overflow as an operation error.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Flush out the Greybus UART driver to actually implement greybus
requests. The number of Greybus Protocol operations has been reduced
down to a managable number, and, if you look closely, you will notice it
follows the CDC ACM USB specification, which can drive UART devices
quite well, no need for complex UART state changes, leave all of that
logic up to the firmware, if it wants/needs it.
The Greybus Protocol spec has been updated to match the driver.
TODO: There are 2 requests from the device to the host that need to be
implemented. As this isn't fully hooked up in the Greybus core, that is
not implemented here yet either.
Implement a skeleton for the uevent framework, to be filled in later
when we figure out what type of module "matching" we want to do for
things (connections, interfaces, modules, etc.)
Based on a patch from Viresh Kumar <viresh.kumar@linaro.org>
Viresh Kumar [Fri, 14 Nov 2014 11:55:04 +0000 (17:25 +0530)]
greybus: connection: fix duplicating naming in _gb_hd_connection_insert()
Though this doesn't cause any logical issues as far as the behavior of the
routine is concerned as the local variable would be considered inside the
'while' loop.
But its better not to use the same name for variables at different levels.
Alex Elder [Wed, 12 Nov 2014 21:17:55 +0000 (15:17 -0600)]
greybus: pass operation type on request receive
When an incoming request is received, the operation type is encoded
in the header and is not available in the payload. Add the
operation type as a parameter to the request_recv method so the
request handler knows what to do.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Elder [Wed, 12 Nov 2014 21:17:53 +0000 (15:17 -0600)]
greybus: simplify pending operations tracking
Greg raised the alarm when I first put in the red-black tree for
tracking pending operations. The reality as that we're not likely
to have that many operations in flight at any one time, so the
complexity of the red-black tree is most likely unwarranted. I
already
This pulls out the red-black tree and uses a simple list instead. A
connection maintains two lists of operations. An operation starts
on its connection's operations list. It is moved to the pending
list when its request message is sent. And it is moved back to
the operations list when the response message arrives. It is
removed from whatever list it's in when the operation is destroyed.
We reuse the single operation->links field for both lists.
Only outgoing requests are ever "pending." Incoming requests are
transient--we receive them, process them, send the response, and
then we're done.
Change a few function names so it's clear we're working with the
pending list.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Elder [Wed, 12 Nov 2014 21:17:52 +0000 (15:17 -0600)]
greybus: move timeout out of gb_operation_insert()
Currently, gb_operation_insert() arranges to time out a request if
it takes too long. Move this out of that function and into
gb_operation_request_send(), so we know it's getting set up after
the request has actually be sent.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Elder [Wed, 12 Nov 2014 21:17:51 +0000 (15:17 -0600)]
greybus: fix request timeout bug
This commit changed the timeout behavior for operations: 6a8732e operation: make the timeout a per-operation thing...
It unfortunately left in place some code that was only
appropriate for per-connection timeouts. In particular,
the timer for an operation is currently getting started
only if no existing operations are in flight.
Fix that oversight, and schedule an operation's timer
unconditionally.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Elder [Wed, 12 Nov 2014 21:17:50 +0000 (15:17 -0600)]
greybus: don't assume PAGE_SIZE for URB size
The buffers allocated for CPort URBS are ES1_GBUF_MSG_SIZE bytes.
But usb_fill_bulk_urb() passes PAGE_SIZE as its size. They happen
to be the same, but the code is wrong, so fix it.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Elder [Thu, 6 Nov 2014 13:01:06 +0000 (07:01 -0600)]
greybus: kill gbuf->complete
The gbuf complete method is a callback that allows the creator of a
gbuf to know when all processing on a gbuf is done.
We now only ever allocate gbufs for use in Greybus operations, and
in that case we only ever supply gb_operation_gbuf_complete() as the
completion callback. Furthermore, the only place gbuf->complete()
is called is in gb_operation_recv_work().
Knowing this, we can just call gb_operation_gbuf_complete() directly
from gb_operation_recv_work(), and get rid of the gbuf->complete()
method entirely.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Thu, 6 Nov 2014 13:01:04 +0000 (07:01 -0600)]
greybus: get rid of greybus_gbuf_finished()
All greybus_gbuf_finished() does is call the gbuf's complete method.
Currently, greybus_gbuf_finished() is only ever called in one place,
and that place can call the complete method directly instead. That
allows us to eliminate greybus_gbuf_finished().
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Thu, 6 Nov 2014 13:01:03 +0000 (07:01 -0600)]
greybus: remove gbuf->context
A gbuf now records a pointer to its operation. The only thing ever
stored in a gbuf context pointer is the gbuf's operation. Therefore
there's no longer any need to maintain the context pointer, so get
rid of it.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Thu, 6 Nov 2014 13:01:02 +0000 (07:01 -0600)]
greybus: record gbuf->operation
Currently a gbuf records a pointer to the connection it's associated
with. We now know only use gbufs in operation messages, so we can
point a gbuf at its operation instead. This still gives access to
the connection where needed, but it also will provide all the
context we'll ever need for a gbuf, and this allows us (in the next
patch) to remove the gbuf->context field as well.
So switch to recording in a gbuf the operation rather than the
connection it is associated with.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Thu, 6 Nov 2014 13:01:01 +0000 (07:01 -0600)]
greybus: get rid of gbuf->actual_length
Right now, the actual_length field of a gbuf is only ever assigned,
never used. We now fill gbufs only with operation messages, and
they encode within them the amount of space "actually used" in a
buffer in a request-specific way. As a result, there's no need
for the gbuf->actual_length field, so we can remove it.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Thu, 6 Nov 2014 13:01:00 +0000 (07:01 -0600)]
greybus: kill old cport handler code
Handling of incoming requests has been moved into the Greybus
connection and protocol layers. As a result, the original cport
oriented handler code is no longer used. So get rid of it.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Wed, 5 Nov 2014 22:12:55 +0000 (16:12 -0600)]
greybus: add an incoming request receive method
Define a new protocol method intended to handle the receipt of an
incoming operation request. Most protocols have no expected
incoming requests and can leave this null. If a request arrives for
a protocol with no request receive handler an error is reported and
the request fails.
Get rid of the previous fixed array of receive handlers, it's
no longer needed.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Wed, 5 Nov 2014 22:12:53 +0000 (16:12 -0600)]
greybus: register preallocated protocols
Set up protocol structures as static objects in each protocol source
file. Pass the address of that in--rather than the protocol id and
version information--to the protocol registration routine. Call a
central routine to register all our pre-defined protocols.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Wed, 5 Nov 2014 22:12:51 +0000 (16:12 -0600)]
greybus: count rather than list protocol users
We don't really need a list of protocol users, we can just keep
track of how many there are. Get rid of the list and use a count
instead.
Also, have gb_protocol_get() return the protocol rather than assigning
a passed-in connection pointer's protocol. Make a comparable change
to the gb_protocol_put() interface.
Get rid of gb_protocol_find() (the version that locks), because it
is no longer needed.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Wed, 5 Nov 2014 22:12:50 +0000 (16:12 -0600)]
greybus: identify protocol by id *and* version
Right now we only look up a protocol based on its protocol id.
Add support for maintaining a major and minor version as well, and
use them when looking up a protocol.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Wed, 5 Nov 2014 22:03:11 +0000 (16:03 -0600)]
greybus: control printing message
There's a message that gets printed in gb_manifest_parse() if excess
descriptors are found in the manifest. This should only be printed
if the parse was successful. If it was not successful it's not
really very helpful.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Alex Elder [Wed, 5 Nov 2014 22:03:08 +0000 (16:03 -0600)]
greybus: fix a bug in gb_operation_gbuf_complete()
The gbuf completion routine was using the request payload pointers
(which point at the area *past* the message header) rather than the
header. This didn't matter much for now, it was only used in the
error path.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
projects / mirror_ubuntu-zesty-kernel.git / log