On 04/20/2012 07:00 PM, Nandigama, Nagalakshmi wrote:
> diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c
> b/drivers/scsi/mpt2sas/mpt2sas_base.c
> index 272fab7..0f47f56 100644
> --- a/drivers/scsi/mpt2sas/mpt2sas_base.c
> +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
> @@ -1792,7 +1792,10 @@ 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()];
> + int cpu = get_cpu();
> + put_cpu();
> + return ioc->cpu_msix_table[cpu];
> +
> }
If we don't care the correctness interrupt CPU. Do
preempt_enable/preempt_disable is just waste of time.
A patch like following is enough, :)
_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()];
}
BTW, I didn't subscribe linux-scsi mailing list, so cc to me is
appreciated.
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