linux-kernel - [SCSI] mpt2sas: wait_for_completion

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Date:	Tue, 30 Dec 2014 11:19:47 -0500
From:	Nicholas Mc Guire <der.herr@...r.at>
To:	Nagalakshmi Nandigama <nagalakshmi.nandigama@...gotech.com>
Cc:	Praveen Krishnamoorthy <praveen.krishnamoorthy@...gotech.com>,
	Sreekanth Reddy <sreekanth.reddy@...gotech.com>,
	Abhijit Mahajan <abhijit.mahajan@...gotech.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Joe Lawrence <joe.lawrence@...atus.com>,
	MPT-FusionLinux.pdl@...gotech.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Nicholas Mc Guire <der.herr@...r.at>
Subject: [SCSI] mpt2sas: wait_for_completion_timeout timeout not reported

wait_for_completion_timeout reaching timeout was being ignored,
this also should fail if timeout condition occurs.
Thanks to Joe Lawrence <joe.lawrence@...atus.com> for confirmation.

this was only compile tested with
x86_64_defconfig + CONFIG_SCSI_LOWLEVEL=y + CONFIG_SCSI_MPT2SAS=m

patch is against linux-next 3.19.0-rc1 -next-20141226

Signed-off-by: Nicholas Mc Guire <der.herr@...r.at>
---
 drivers/scsi/mpt2sas/mpt2sas_config.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt2sas/mpt2sas_config.c b/drivers/scsi/mpt2sas/mpt2sas_config.c
index c72a2ff..02dc2d8 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_config.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_config.c
@@ -391,7 +391,7 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
 	mpt2sas_base_put_smid_default(ioc, smid);
 	timeleft = wait_for_completion_timeout(&ioc->config_cmds.done,
 	    timeout*HZ);
-	if (!(ioc->config_cmds.status & MPT2_CMD_COMPLETE)) {
+	if (timeleft == 0 || !(ioc->config_cmds.status & MPT2_CMD_COMPLETE)) {
 		printk(MPT2SAS_ERR_FMT "%s: timeout\n",
 		    ioc->name, __func__);
 		_debug_dump_mf(mpi_request,
-- 
1.7.10.4

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