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mei: fix reading large reposnes

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While writting to device is limitted to max_msg_length advertized
in client properites the read can be much longer delivered consequiting chunks.

We use krealloc to enlarge the buffer when needed.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2013-04-19 22:01:35 +03:00
committed by Greg Kroah-Hartman
parent 6e0f180fd8
commit fcb136e1ac
5 changed files with 27 additions and 15 deletions
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7
drivers/misc/mei/client.c
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@@ -624,7 +624,7 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
*
* returns 0 on success, <0 on failure.
*/
int mei_cl_read_start(struct mei_cl *cl)
int mei_cl_read_start(struct mei_cl *cl, size_t length)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
@@ -657,8 +657,9 @@ int mei_cl_read_start(struct mei_cl *cl)
if (!cb)
return -ENOMEM;
rets = mei_io_cb_alloc_resp_buf(cb,
dev->me_clients[i].props.max_msg_length);
/* always allocate at least client max message */
length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
rets = mei_io_cb_alloc_resp_buf(cb, length);
if (rets)
goto err;