[SCSI] lpfc 8.3.6 : Fix critical errors

Fix errors relating to crashes and hangs.
 - Fix crash due to list corruption while unloading driver.
 - Fix panic during pci-hot-plug testing.
 - Fix panic when unmapping luns.
 - Fixed total_scsi_bufs counting could cause exhausted memory.
 - Fixed locking issue causing hang.
 - Fixed the call from lpfc_new_scsi_buf_s3 to use lpfc_release_scsi_buf_s3.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 93679f30a5af..5f5b2283d58c 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -2320,6 +2320,7 @@ lpfc_scsi_free(struct lpfc_hba *phba)
 
         spin_lock_irq(&phba->hbalock);
         /* Release all the lpfc_scsi_bufs maintained by this host. */
+        spin_lock(&phba->scsi_buf_list_lock);
         list_for_each_entry_safe(sb, sb_next, &phba->lpfc_scsi_buf_list, list) {
                 list_del(&sb->list);
                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, sb->data,
@@ -2327,6 +2328,7 @@ lpfc_scsi_free(struct lpfc_hba *phba)
                 kfree(sb);
                 phba->total_scsi_bufs--;
         }
+        spin_unlock(&phba->scsi_buf_list_lock);
 
         /* Release all the lpfc_iocbq entries maintained by this host. */
         list_for_each_entry_safe(io, io_next, &phba->lpfc_iocb_list, list) {
@@ -2334,9 +2336,7 @@ lpfc_scsi_free(struct lpfc_hba *phba)
                 kfree(io);
                 phba->total_iocbq_bufs--;
         }
-
         spin_unlock_irq(&phba->hbalock);
-
         return 0;
 }