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msm: smd_pkt: close the smd channel if open process times out

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If the smd_pkt open process times out after smd_open returned success,
call smd_close so that the end client can successfully attempt to open
the smd_pkt device at a later time.  If this is not done, smd_open will
return an error code when the end client attempts a retry, causing smd
and smd_pkt to get out of sync with regards to the state of the smd
channel.

Change-Id: I7169fb787f91a4ea7870872f9b1f1faeee2a1336
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
This commit is contained in:
Jeff Hugo
2012-04-30 11:10:54 -06:00
parent 762e52acf9
commit 4d9fdf3641
1 changed files with 5 additions and 1 deletions
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6
arch/arm/mach-msm/smd_pkt.c
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@@ -833,8 +833,12 @@ int smd_pkt_open(struct inode *inode, struct file *file)
r = wait_event_interruptible_timeout(
smd_pkt_devp->ch_opened_wait_queue,
smd_pkt_devp->is_open, (2 * HZ));
if (r == 0)
if (r == 0) {
r = -ETIMEDOUT;
/* close the ch to sync smd's state with smd_pkt */
smd_close(smd_pkt_devp->ch);
smd_pkt_devp->ch = NULL;
}
if (r < 0) {
pr_err("%s: wait on smd_pkt_dev id:%d OPEN event failed"