[PATCH 8/9] aacraid: use scsi_host_busy_iter() in get_num_of_incomplete_fibs()

Hannes Reinecke
2019-11-18T09:22:36Z

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.

Cc: Balsundar P <balsundar.p@microsemi.com>
Cc: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/aacraid/linit.c | 81 ++++++++++++++++++++++----------------------
1 file changed, 41 insertions(+), 40 deletions(-)

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index ee6bc2f9b80a..db96482c4fdc 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -622,54 +622,56 @@ static int aac_ioctl(struct scsi_device *sdev, unsigned int cmd,
return aac_do_ioctl(dev, cmd, arg);
}

-static int get_num_of_incomplete_fibs(struct aac_dev *aac)
+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;

- unsigned long flags;
- struct scsi_device *sdev = NULL;
+ 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)
+{
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();
--
2.16.4