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scsi: aacraid: use scsi_host_busy_iter() in get_num_of_incomplete_fibs()

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Use the SCSI midlayer helper to traverse the number of outstanding
commands. This also eliminates the last usage for the cmd_list
functionality so we can drop it.

Link: https://lore.kernel.org/r/20200228075318.91255-13-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P <balsundar.p@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2020-02-28 08:53:17 +01:00 committed by Martin K. Petersen
parent f4a0c9dbc6
commit 35d2ce0b65
1 changed files with 41 additions and 40 deletions
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81
drivers/scsi/aacraid/linit.c
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@ -622,54 +622,56 @@ static int aac_ioctl(struct scsi_device *sdev, unsigned int cmd,
return aac_do_ioctl(dev, cmd, arg);
}
struct fib_count_data {
int mlcnt;
int llcnt;
int ehcnt;
int fwcnt;
int krlcnt;
};
static bool fib_count_iter(struct scsi_cmnd *scmnd, void *data, bool reserved)
{
struct fib_count_data *fib_count = data;
switch (scmnd->SCp.phase) {
case AAC_OWNER_FIRMWARE:
fib_count->fwcnt++;
break;
case AAC_OWNER_ERROR_HANDLER:
fib_count->ehcnt++;
break;
case AAC_OWNER_LOWLEVEL:
fib_count->llcnt++;
break;
case AAC_OWNER_MIDLEVEL:
fib_count->mlcnt++;
break;
default:
fib_count->krlcnt++;
break;
}
return true;
}
/* Called during SCSI EH, so we don't need to block requests */
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;
struct fib_count_data fcnt = { };
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);
}
scsi_host_busy_iter(shost, fib_count_iter, &fcnt);
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);
dev_info(ctrl_dev, "outstanding cmd: midlevel-%d\n", fcnt.mlcnt);
dev_info(ctrl_dev, "outstanding cmd: lowlevel-%d\n", fcnt.llcnt);
dev_info(ctrl_dev, "outstanding cmd: error handler-%d\n", fcnt.ehcnt);
dev_info(ctrl_dev, "outstanding cmd: firmware-%d\n", fcnt.fwcnt);
dev_info(ctrl_dev, "outstanding cmd: kernel-%d\n", fcnt.krlcnt);
return mlcnt + llcnt + ehcnt + fwcnt;
return fcnt.mlcnt + fcnt.llcnt + fcnt.ehcnt + fcnt.fwcnt;
}
static int aac_eh_abort(struct scsi_cmnd* cmd)
@ -1675,7 +1677,6 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
shost->irq = pdev->irq;
shost->unique_id = unique_id;
shost->max_cmd_len = 16;
shost->use_cmd_list = 1;
if (aac_cfg_major == AAC_CHARDEV_NEEDS_REINIT)
aac_init_char();