scsi: megaraid_sas: Do not use 32-bit atomic request descriptor for Ventura controllers

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commit 9ff97fa8db upstream.

Problem Statement: Sending I/O through 32 bit descriptors to Ventura series of
controller results in IO timeout on certain conditions.

This error only occurs on systems with high I/O activity on Ventura series
controllers.

Changes in this patch will prevent driver from using 32 bit descriptor and use
64 bit Descriptors.

Cc: <stable@vger.kernel.org>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Shivasharan S 2018-02-14 00:10:52 -08:00 • committed by Greg Kroah-Hartman

parent 8096079403

commit 23e73e2ab4

1 changed files with 14 additions and 28 deletions

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drivers/scsi/megaraid/megaraid_sas_fusion.c

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