commit a2c658505bf5c75516ee0a79287223e86a2474af
author nagalakshmi.nandigama@lsi.com <nagalakshmi.nandigama@lsi.com> Tue Apr 17 11:25:04 2012 +0530
committer James Bottomley <JBottomley@Parallels.com> Wed Jun 06 12:38:56 2012 +0900
tree 9fe23d2db75e2a24cae14ad8c6985f6d0b5e8be4
parent 99becf1328d8d71dd6f4480e3591d7dcdb389e57

[SCSI] mpt2sas: Fix unsafe using smp_processor_id() in preemptible

When CONFIG_DEBUG_PREEMPT is enabled, bug is observed in the smp_processor_id().
This is because smp_processor_id() is not called in preempt safe condition.

To fix this issue, use raw_smp_processor_id instead of smp_processor_id.

Signed-off-by: Nagalakshmi Nandigama <nagalakshmi.nandigama@lsi.com>
CC: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/mpt2sas/mpt2sas_base.c

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 6102ef2..9d46fcb 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -1792,7 +1792,7 @@
 static inline u8
 _base_get_msix_index(struct MPT2SAS_ADAPTER *ioc)
 {
-	return ioc->cpu_msix_table[smp_processor_id()];
+	return ioc->cpu_msix_table[raw_smp_processor_id()];
 }
 
 /**