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scsi: aacraid: Log count info of scsi cmds before reset 

Log the location of the scsi cmds before triggering a reset. This
information is useful for debugging.

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Raghava Aditya Renukunta 2017-05-10 09:39:41 -07:00 committed by Martin K. Petersen
parent 2a4a62c03f
commit 895dc759cf
1 changed files with 53 additions and 37 deletions
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90
drivers/scsi/aacraid/linit.c
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@ -624,6 +624,56 @@ static int aac_ioctl(struct scsi_device *sdev, int cmd, void __user * arg)
return aac_do_ioctl(dev, cmd, arg);
}
static int get_num_of_incomplete_fibs(struct aac_dev *aac)
{
unsigned long flags;
struct scsi_device *sdev = NULL;
struct Scsi_Host *shost = aac->scsi_host_ptr;
struct scsi_cmnd *scmnd = NULL;
struct device *ctrl_dev;
int mlcnt = 0;
int llcnt = 0;
int ehcnt = 0;
int fwcnt = 0;
int krlcnt = 0;
__shost_for_each_device(sdev, shost) {
spin_lock_irqsave(&sdev->list_lock, flags);
list_for_each_entry(scmnd, &sdev->cmd_list, list) {
switch (scmnd->SCp.phase) {
case AAC_OWNER_FIRMWARE:
fwcnt++;
break;
case AAC_OWNER_ERROR_HANDLER:
ehcnt++;
break;
case AAC_OWNER_LOWLEVEL:
llcnt++;
break;
case AAC_OWNER_MIDLEVEL:
mlcnt++;
break;
default:
krlcnt++;
break;
}
}
spin_unlock_irqrestore(&sdev->list_lock, flags);
}
ctrl_dev = &aac->pdev->dev;
dev_info(ctrl_dev, "outstanding cmd: midlevel-%d\n", mlcnt);
dev_info(ctrl_dev, "outstanding cmd: lowlevel-%d\n", llcnt);
dev_info(ctrl_dev, "outstanding cmd: error handler-%d\n", ehcnt);
dev_info(ctrl_dev, "outstanding cmd: firmware-%d\n", fwcnt);
dev_info(ctrl_dev, "outstanding cmd: kernel-%d\n", krlcnt);
return mlcnt + llcnt + ehcnt + fwcnt;
}
static int aac_eh_abort(struct scsi_cmnd* cmd)
{
struct scsi_device * dev = cmd->device;
@ -853,8 +903,6 @@ static int aac_eh_reset(struct scsi_cmnd* cmd)
pr_err("%s: Host adapter reset request timed out\n",
AAC_DRIVERNAME);
} else {
struct scsi_cmnd *command;
unsigned long flags;
/* Mark the assoc. FIB to not complete, eh handler does this */
for (count = 0;
@ -873,41 +921,9 @@ static int aac_eh_reset(struct scsi_cmnd* cmd)
pr_err("%s: Host adapter reset request. SCSI hang ?\n",
AAC_DRIVERNAME);
count = aac_check_health(aac);
if (count)
return count;
/*
* Wait for all commands to complete to this specific
* target (block maximum 60 seconds).
*/
for (count = 60; count; --count) {
int active = aac->in_reset;
if (active == 0)
__shost_for_each_device(dev, host) {
spin_lock_irqsave(&dev->list_lock, flags);
list_for_each_entry(command, &dev->cmd_list,
list) {
if ((command != cmd) &&
(command->SCp.phase ==
AAC_OWNER_FIRMWARE)) {
active++;
break;
}
}
spin_unlock_irqrestore(&dev->list_lock, flags);
if (active)
break;
}
/*
* We can exit If all the commands are complete
*/
if (active == 0)
return SUCCESS;
ssleep(1);
}
pr_err("%s: SCSI bus appears hung\n", AAC_DRIVERNAME);
count = get_num_of_incomplete_fibs(aac);
if (count == 0)
return SUCCESS;
/*
* This adapter needs a blind reset, only do so for