@@ -2416,8 +2416,8 @@ static void asc_prt_scsi_host(struct Scsi_Host *s)
struct asc_board *boardp = shost_priv(s);
printk("Scsi_Host at addr 0x%p, device %s\n", s, dev_name(boardp->dev));
- printk(" host_busy %u, host_no %d,\n",
- atomic_read(&s->host_busy), s->host_no);
+ printk(" host_busy %d, host_no %d,\n",
+ scsi_host_busy(s), s->host_no);
printk(" base 0x%lx, io_port 0x%lx, irq %d,\n",
(ulong)s->base, (ulong)s->io_port, boardp->irq);
@@ -3182,8 +3182,8 @@ static void asc_prt_driver_conf(struct seq_file *m, struct Scsi_Host *shost)
shost->host_no);
seq_printf(m,
- " host_busy %u, max_id %u, max_lun %llu, max_channel %u\n",
- atomic_read(&shost->host_busy), shost->max_id,
+ " host_busy %d, max_id %u, max_lun %llu, max_channel %u\n",
+ scsi_host_busy(shost), shost->max_id,
shost->max_lun, shost->max_channel);
seq_printf(m,
@@ -564,6 +564,16 @@ struct Scsi_Host *scsi_host_get(struct Scsi_Host *shost)
EXPORT_SYMBOL(scsi_host_get);
/**
+ * scsi_host_busy - Return the host busy counter
+ * @shost: Pointer to Scsi_Host to inc.
+ **/
+int scsi_host_busy(struct Scsi_Host *shost)
+{
+ return atomic_read(&shost->host_busy);
+}
+EXPORT_SYMBOL(scsi_host_busy);
+
+/**
* scsi_host_put - dec a Scsi_Host ref count
* @shost: Pointer to Scsi_Host to dec.
**/
@@ -759,7 +759,7 @@ void sas_scsi_recover_host(struct Scsi_Host *shost)
spin_unlock_irq(shost->host_lock);
SAS_DPRINTK("Enter %s busy: %d failed: %d\n",
- __func__, atomic_read(&shost->host_busy), shost->host_failed);
+ __func__, scsi_host_busy(shost), shost->host_failed);
/*
* Deal with commands that still have SAS tasks (i.e. they didn't
* complete via the normal sas_task completion mechanism),
@@ -801,7 +801,7 @@ void sas_scsi_recover_host(struct Scsi_Host *shost)
goto retry;
SAS_DPRINTK("--- Exit %s: busy: %d failed: %d tries: %d\n",
- __func__, atomic_read(&shost->host_busy),
+ __func__, scsi_host_busy(shost),
shost->host_failed, tries);
}
@@ -2834,7 +2834,7 @@ static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
"SCSI command pointer: (%p)\t SCSI host state: %d\t"
" SCSI host busy: %d\t FW outstanding: %d\n",
scmd, scmd->device->host->shost_state,
- atomic_read((atomic_t *)&scmd->device->host->host_busy),
+ scsi_host_busy(scmd->device->host),
atomic_read(&instance->fw_outstanding));
/*
@@ -3250,7 +3250,7 @@ _base_recovery_check(struct MPT3SAS_ADAPTER *ioc)
* See _wait_for_commands_to_complete() call with regards to this code.
*/
if (ioc->shost_recovery && ioc->pending_io_count) {
- ioc->pending_io_count = atomic_read(&ioc->shost->host_busy);
+ ioc->pending_io_count = scsi_host_busy(ioc->shost);
if (ioc->pending_io_count == 0)
wake_up(&ioc->reset_wq);
}
@@ -6857,7 +6857,7 @@ mpt3sas_wait_for_commands_to_complete(struct MPT3SAS_ADAPTER *ioc)
return;
/* pending command count */
- ioc->pending_io_count = atomic_read(&ioc->shost->host_busy);
+ ioc->pending_io_count = scsi_host_busy(ioc->shost);
if (!ioc->pending_io_count)
return;
@@ -959,7 +959,7 @@ static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int
/* Temporary workaround until bug is found and fixed (one bug has been found
already, but fixing it makes things even worse) -jj */
int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
- host->can_queue = atomic_read(&host->host_busy) + num_free;
+ host->can_queue = scsi_host_busy(host) + num_free;
host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
}
@@ -167,7 +167,7 @@ void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
if (level > 3)
scmd_printk(KERN_INFO, cmd,
"scsi host busy %d failed %d\n",
- atomic_read(&cmd->device->host->host_busy),
+ scsi_host_busy(cmd->device->host),
cmd->device->host->host_failed);
}
}
@@ -66,7 +66,7 @@ void scsi_eh_wakeup(struct Scsi_Host *shost)
{
lockdep_assert_held(shost->host_lock);
- if (atomic_read(&shost->host_busy) == shost->host_failed) {
+ if (scsi_host_busy(shost) == shost->host_failed) {
trace_scsi_eh_wakeup(shost);
wake_up_process(shost->ehandler);
SCSI_LOG_ERROR_RECOVERY(5, shost_printk(KERN_INFO, shost,
@@ -2155,7 +2155,7 @@ int scsi_error_handler(void *data)
break;
if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||
- shost->host_failed != atomic_read(&shost->host_busy)) {
+ shost->host_failed != scsi_host_busy(shost)) {
SCSI_LOG_ERROR_RECOVERY(1,
shost_printk(KERN_INFO, shost,
"scsi_eh_%d: sleeping\n",
@@ -2170,7 +2170,7 @@ int scsi_error_handler(void *data)
"scsi_eh_%d: waking up %d/%d/%d\n",
shost->host_no, shost->host_eh_scheduled,
shost->host_failed,
- atomic_read(&shost->host_busy)));
+ scsi_host_busy(shost)));
/*
* We have a host that is failing for some reason. Figure out
@@ -382,7 +382,7 @@ static ssize_t
show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
- return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
+ return snprintf(buf, 20, "%d\n", scsi_host_busy(shost));
}
static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
@@ -758,6 +758,7 @@ extern void scsi_scan_host(struct Scsi_Host *);
extern void scsi_rescan_device(struct device *);
extern void scsi_remove_host(struct Scsi_Host *);
extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
+extern int scsi_host_busy(struct Scsi_Host *shost);
extern void scsi_host_put(struct Scsi_Host *t);
extern struct Scsi_Host *scsi_host_lookup(unsigned short);
extern const char *scsi_host_state_name(enum scsi_host_state);
No functional change. Just introduce scsi_host_busy() and replace the direct read of scsi_host->host_busy with this new API. Cc: Omar Sandoval <osandov@fb.com>, Cc: "Martin K. Petersen" <martin.petersen@oracle.com>, Cc: James Bottomley <james.bottomley@hansenpartnership.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: Don Brace <don.brace@microsemi.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Laurence Oberman <loberman@redhat.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> --- drivers/scsi/advansys.c | 8 ++++---- drivers/scsi/hosts.c | 10 ++++++++++ drivers/scsi/libsas/sas_scsi_host.c | 4 ++-- drivers/scsi/megaraid/megaraid_sas_base.c | 2 +- drivers/scsi/mpt3sas/mpt3sas_base.c | 4 ++-- drivers/scsi/qlogicpti.c | 2 +- drivers/scsi/scsi.c | 2 +- drivers/scsi/scsi_error.c | 6 +++--- drivers/scsi/scsi_sysfs.c | 2 +- include/scsi/scsi_host.h | 1 + 10 files changed, 26 insertions(+), 15 deletions(-)