@@ -282,11 +282,12 @@ static void scsi_eh_inc_host_failed(struct rcu_head *head)
{
struct scsi_cmnd *scmd = container_of(head, typeof(*scmd), rcu);
struct Scsi_Host *shost = scmd->device->host;
+ unsigned int busy = scsi_host_busy(shost);
unsigned long flags;
spin_lock_irqsave(shost->host_lock, flags);
shost->host_failed++;
- scsi_eh_wakeup(shost, scsi_host_busy(shost));
+ scsi_eh_wakeup(shost, busy);
spin_unlock_irqrestore(shost->host_lock, flags);
}
@@ -278,9 +278,11 @@ static void scsi_dec_host_busy(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
rcu_read_lock();
__clear_bit(SCMD_STATE_INFLIGHT, &cmd->state);
if (unlikely(scsi_host_in_recovery(shost))) {
+ unsigned int busy = scsi_host_busy(shost);
+
spin_lock_irqsave(shost->host_lock, flags);
if (shost->host_failed || shost->host_eh_scheduled)
- scsi_eh_wakeup(shost, scsi_host_busy(shost));
+ scsi_eh_wakeup(shost, busy);
spin_unlock_irqrestore(shost->host_lock, flags);
}
rcu_read_unlock();
Commit 4373534a9850 ("scsi: core: Move scsi_host_busy() out of host lock for waking up EH handler") is for fixing hard lockup issue triggered by EH. The core idea is to move scsi_host_busy() out of host lock if it is called for per-command. However, the patch is merged as wrong and doesn't move scsi_host_busy() out of host lock, so fix it. Fixes: 4373534a9850 ("scsi: core: Move scsi_host_busy() out of host lock for waking up EH handler") Cc: Sathya Prakash Veerichetty <safhya.prakash@broadcom.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Ewan D. Milne <emilne@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> --- drivers/scsi/scsi_error.c | 3 ++- drivers/scsi/scsi_lib.c | 4 +++- 2 files changed, 5 insertions(+), 2 deletions(-)