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[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>
hifive-unleashed-5.1
nagalakshmi.nandigama@lsi.com 2012-04-17 11:25:04 +05:30 committed by James Bottomley
parent 99becf1328
commit a2c658505b
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/mpt2sas/mpt2sas_base.c
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@ -1792,7 +1792,7 @@ static inline void _base_writeq(__u64 b, volatile void __iomem *addr,
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()];
}
/**