scsi: megaraid_sas: Do not use 32-bit atomic request descriptor for Ventura controllers
authorShivasharan S <shivasharan.srikanteshwara@broadcom.com>
Wed, 14 Feb 2018 08:10:52 +0000 (00:10 -0800)
committerMartin K. Petersen <martin.petersen@oracle.com>
Thu, 15 Feb 2018 23:23:37 +0000 (18:23 -0500)
commit9ff97fa8db94caeab59a3c5401e975df468b4d8e
tree5551378f277d20943df5fd18a0f6495bcc643c5d
parent1bc5ad3a6acdcf56f83272f2de1cd2389ea9e9e2
scsi: megaraid_sas: Do not use 32-bit atomic request descriptor for Ventura controllers

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>
drivers/scsi/megaraid/megaraid_sas_fusion.c