scsi: target: tcmu: Return from tcmu_handle_completions() if cmd_id not found

[ Upstream commit 9814b55cde0588b6d9bc496cee43f87316cbc6f1 ]

If tcmu_handle_completions() finds an invalid cmd_id while looping over cmd
responses from userspace it sets TCMU_DEV_BIT_BROKEN and breaks the
loop. This means that it does further handling for the tcmu device.

Skip that handling by replacing 'break' with 'return'.

Additionally change tcmu_handle_completions() from unsigned int to bool,
since the value used in return already is bool.

Link: https://lore.kernel.org/r/20210423150123.24468-1-bostroesser@gmail.com
Signed-off-by: Bodo Stroesser <bostroesser@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 7d5814a95e1ed0080c5f5773c484401fa7a558ae..c6950f157b99f8527b5f5f982577b53502e45cc9 100644 (file)
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -1391,7 +1391,7 @@ static int tcmu_run_tmr_queue(struct tcmu_dev *udev)
        return 1;
 }
 
-static unsigned int tcmu_handle_completions(struct tcmu_dev *udev)
+static bool tcmu_handle_completions(struct tcmu_dev *udev)
 {
        struct tcmu_mailbox *mb;
        struct tcmu_cmd *cmd;
@@ -1434,7 +1434,7 @@ static unsigned int tcmu_handle_completions(struct tcmu_dev *udev)
                        pr_err("cmd_id %u not found, ring is broken\n",
                               entry->hdr.cmd_id);
                        set_bit(TCMU_DEV_BIT_BROKEN, &udev->flags);
-                       break;
+                       return false;
                }
 
                tcmu_handle_completion(cmd, entry);