Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "One target driver fix and one scsi-generic one. The latter is 10 lines
  because the problem lock has to be dropped and re-taken around the
  call causing the sleep in atomic"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sg: Do not sleep in atomic context
  scsi: target: tcm_loop: Fix segfault in tcm_loop_tpg_address_show()

Author: torvalds

drivers/scsi/sg.c

@@ -2208,9 +2208,17 @@ sg_remove_sfp_usercontext(struct work_struct *work)
 	write_lock_irqsave(&sfp->rq_list_lock, iflags);
 	while (!list_empty(&sfp->rq_list)) {
 		srp = list_first_entry(&sfp->rq_list, Sg_request, entry);
-		sg_finish_rem_req(srp);
 		list_del(&srp->entry);
+		write_unlock_irqrestore(&sfp->rq_list_lock, iflags);
+
+		sg_finish_rem_req(srp);
+		/*
+		 * sg_rq_end_io() uses srp->parentfp. Hence, only clear
+		 * srp->parentfp after blk_mq_free_request() has been called.
+		 */
 		srp->parentfp = NULL;
+
+		write_lock_irqsave(&sfp->rq_list_lock, iflags);
 	}
 	write_unlock_irqrestore(&sfp->rq_list_lock, iflags);
 

drivers/target/loopback/tcm_loop.c

@@ -894,6 +894,9 @@ static ssize_t tcm_loop_tpg_address_show(struct config_item *item,
 			struct tcm_loop_tpg, tl_se_tpg);
 	struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
 
+	if (!tl_hba->sh)
+		return -ENODEV;
+
 	return snprintf(page, PAGE_SIZE, "%d:0:%d\n",
 			tl_hba->sh->host_no, tl_tpg->tl_tpgt);
 }