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| author |   Ming Lei <ming.lei@redhat.com> | 2019-01-11 09:40:47 -0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2019-01-11 21:55:43 -0500 |
| commit | f0783d43dde4bb349fcd667df0afabbdbab8b477 (patch) | |
| tree | d15f94bed47f97864ebb230758b7d776a3ce343e /drivers/scsi/qla2xxx/qla_def.h | |
| parent | scsi: hisi_sas: Set protection parameters prior to adding SCSI host (diff) | |
| download | linux-dev-f0783d43dde4bb349fcd667df0afabbdbab8b477.tar.xz linux-dev-f0783d43dde4bb349fcd667df0afabbdbab8b477.zip | |
scsi: qla2xxx: Use correct number of vectors for online CPUs
When SCSI-MQ is enabled, in some case system would present
nr_possible_cpus() which is greater than requested vectors by the
driver. This results into driver being able to get larger number of MSI-X
vectors than actual online CPUs. Driver then uses
pci_alloc_irq_vectors_affinity() to assign 1:1 mapping and affinity for
each MSI-x vector to CPUs. When the command is submitted using MSI-x
vector, assigned to offline CPU, it results in an ABTS and system
hang. This hang is result of a driver not being able to process interrupt
on a vector assigned to an Off-line CPUs
This patch fixes this issue by setting irq_offset value for the
blk_mq_pci_map_queues() to use only those CPUs which has CPU mask affinity
assigned and are online. By using the irq_offset value, driver will allow
online cpumask to decide which vectors are used in blk_mq_pci_map_queues().
Fixes: 5601236b6f794 ("scsi: qla2xxx: Add Block Multi Queue functionality.")
Cc: <stable@vger.kernel.org> #4.19
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Himanshu Madhani <hmadhani@marvell.com>
Tested-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_def.h')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_def.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 26b93c563f92..d1fc4958222a 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -4394,6 +4394,8 @@ typedef struct scsi_qla_host { uint16_t n2n_id; struct list_head gpnid_list; struct fab_scan scan; + + unsigned int irq_offset; } scsi_qla_host_t; struct qla27xx_image_status { |