linux-kernel - [PATCH] scsi/mpt2sas: remove unnecesscary preempt requirement for MSIX

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1335594453-30679-1-git-send-email-alex.shi@intel.com>
Date:	Sat, 28 Apr 2012 14:27:33 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	JBottomley@...allels.com, Nagalakshmi.Nandigama@....com
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	alex.shi@...el.com
Subject: [PATCH] scsi/mpt2sas: remove unnecesscary preempt requirement for MSIX

smp_processor_id() need used in preempt safe ENV. Otherwise, the
cpu may be preempted and run on other cpus. But here, we don't care much
the specific CPU which handler the MSI, so just replace it by
raw_smp_processor_id() to avoid preempt debug warning.

Signed-off-by: Alex Shi <alex.shi@...el.com>
---
 drivers/scsi/mpt2sas/mpt2sas_base.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 8a59a77..3f518ba 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -1785,7 +1785,7 @@ 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()];
 }
 
 /**
-- 
1.7.5.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/