@@ -6061,16 +6061,15 @@ static ssize_t delay_store(struct device_driver *ddp, const char *buf,
if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
res = count;
if (sdebug_jdelay != jdelay) {
- int j, k;
- struct sdebug_queue *sqp;
+ struct sdebug_host_info *sdhp;
mutex_lock(&sdebug_host_list_mutex);
block_unblock_all_queues(true);
- for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
- ++j, ++sqp) {
- k = find_first_bit(sqp->in_use_bm,
- sdebug_max_queue);
- if (k != sdebug_max_queue) {
+
+ list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
+ struct Scsi_Host *shost = sdhp->shost;
+
+ if (scsi_host_busy(shost)) {
res = -EBUSY; /* queued commands */
break;
}
@@ -6103,20 +6102,20 @@ static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
(ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
res = count;
if (sdebug_ndelay != ndelay) {
- int j, k;
- struct sdebug_queue *sqp;
+ struct sdebug_host_info *sdhp;
mutex_lock(&sdebug_host_list_mutex);
block_unblock_all_queues(true);
- for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
- ++j, ++sqp) {
- k = find_first_bit(sqp->in_use_bm,
- sdebug_max_queue);
- if (k != sdebug_max_queue) {
+
+ list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
+ struct Scsi_Host *shost = sdhp->shost;
+
+ if (scsi_host_busy(shost)) {
res = -EBUSY; /* queued commands */
break;
}
}
+
if (res > 0) {
sdebug_ndelay = ndelay;
sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
The functions to update ndelay and delay value first check whether we have any in-flight IO for any host. It does this by checking if any tag is used in the global submit queues. We can achieve the same by setting the host as blocked and then ensuring that we have no in-flight commands with scsi_host_busy(). Note that scsi_host_busy() checks SCMD_STATE_INFLIGHT flag, which is only set per command after we ensure that the host is not blocked, i.e. we see more commands active after the check for scsi_host_busy() returns 0. Signed-off-by: John Garry <john.g.garry@oracle.com> --- drivers/scsi/scsi_debug.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-)