diff options
| author | Sumit Saxena <sumit.saxena@avagotech.com> | 2016-01-28 21:04:31 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-02-23 21:27:02 -0500 |
| commit | 52b62ac7c66e1a11eb8b3e3b0212847749af3b2d (patch) | |
| tree | a27f8415c9a90f9f00a37c2e36ec14985b9bf886 /drivers/scsi/megaraid/megaraid_sas_fusion.c | |
| parent | 308ec459bc1975d9856cfeb3d1cd6461794a3976 (diff) | |
megaraid_sas: IO throttling support
This patch will add capability in driver to tell firmware that it can
throttle IOs in case controller's queue depth is downgraded post OFU
(online firmware upgrade). This feature will ensure firmware can be
downgraded from higher queue depth to lower queue depth without needing
system reboot. Added throttling code in IO path of driver, in case OS
tries to send more IOs than post OFU firmware's queue depth.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_sas_fusion.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_fusion.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 6b8547cf9de4..2c4912f68225 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -803,6 +803,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) if (!dual_qdepth_disable) drv_ops->mfi_capabilities.support_ext_queue_depth = 1; + drv_ops->mfi_capabilities.support_qd_throttling = 1; /* Convert capability to LE32 */ cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities); |