megaraid_sas: Introduce module parameter for SCSI command timeout

This patch will introduce module-parameter for SCSI command timeout
value and fix setting of resetwaittime beyond a value.

Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

2 files changed, 13 insertions, 4 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index d2ea97769c76..54922e5f4faa 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -83,7 +83,7 @@ module_param(throttlequeuedepth, int, S_IRUGO);
 MODULE_PARM_DESC(throttlequeuedepth,
         "Adapter queue depth when throttled due to I/O timeout. Default: 16");
 
-int resetwaittime = MEGASAS_RESET_WAIT_TIME;
+unsigned int resetwaittime = MEGASAS_RESET_WAIT_TIME;
 module_param(resetwaittime, int, S_IRUGO);
 MODULE_PARM_DESC(resetwaittime, "Wait time in seconds after I/O timeout "
                  "before resetting adapter. Default: 180");
@@ -100,6 +100,10 @@ unsigned int dual_qdepth_disable;
 module_param(dual_qdepth_disable, int, S_IRUGO);
 MODULE_PARM_DESC(dual_qdepth_disable, "Disable dual queue depth feature. Default: 0");
 
+unsigned int scmd_timeout = MEGASAS_DEFAULT_CMD_TIMEOUT;
+module_param(scmd_timeout, int, S_IRUGO);
+MODULE_PARM_DESC(scmd_timeout, "scsi command timeout (10-90s), default 90s. See megasas_reset_timer.");
+
 MODULE_LICENSE("GPL");
 MODULE_VERSION(MEGASAS_VERSION);
 MODULE_AUTHOR("megaraidlinux.pdl@avagotech.com");
@@ -1850,7 +1854,7 @@ static int megasas_slave_configure(struct scsi_device *sdev)
          * The RAID firmware may require extended timeouts.
          */
         blk_queue_rq_timeout(sdev->request_queue,
-                MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
+                scmd_timeout * HZ);
 
         return 0;
 }
@@ -2645,7 +2649,7 @@ blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
         unsigned long flags;
 
         if (time_after(jiffies, scmd->jiffies_at_alloc +
-                                (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
+                                (scmd_timeout * 2) * HZ)) {
                 return BLK_EH_NOT_HANDLED;
         }
 
@@ -5254,6 +5258,11 @@ static int megasas_init_fw(struct megasas_instance *instance)
                 instance->throttlequeuedepth =
                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
 
+        if (resetwaittime > MEGASAS_RESET_WAIT_TIME)
+                resetwaittime = MEGASAS_RESET_WAIT_TIME;
+
+        if ((scmd_timeout < 10) || (scmd_timeout > MEGASAS_DEFAULT_CMD_TIMEOUT))
+                scmd_timeout = MEGASAS_DEFAULT_CMD_TIMEOUT;
 
         /* Launch SR-IOV heartbeat timer */
         if (instance->requestorId) {
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 64926f7ef119..e740e2608a37 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -91,7 +91,7 @@ void megasas_start_timer(struct megasas_instance *instance,
                         struct timer_list *timer,
                          void *fn, unsigned long interval);
 extern struct megasas_mgmt_info megasas_mgmt_info;
-extern int resetwaittime;
+extern unsigned int resetwaittime;
 extern unsigned int dual_qdepth_disable;
 static void megasas_free_rdpq_fusion(struct megasas_instance *instance);
 static void megasas_free_reply_fusion(struct megasas_instance *instance);