scsi: smartpqi: fix critical ARM issue reading PQI index registers

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Use the readl() kernel function to read all index registers. For ARM
systems, this function includes a read memory barrier that eliminates ci/pi
corruption.

Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Tested-by: Shunyong Yang <shunyong.yang@hxt-semitech.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Kevin Barnett 2018-06-18 13:23:00 -05:00 • committed by Martin K. Petersen

parent 9f8d05fa98

commit dac12fbc7b

2 changed files with 30 additions and 25 deletions

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10

drivers/scsi/smartpqi/smartpqi.h

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45

drivers/scsi/smartpqi/smartpqi_init.c

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