From: Yu Kuai <yukuai3@xxxxxxxxxx>
Commit fcaa174a9c99 ("scsi/sg: don't grab scsi host module reference")
make a mess how blk_get_queue() is called, blk_get_queue() returns true
on success while the caller expects it returns 0 on success.
Fix this problem and also add a corresponding error message on failure.
Fixes: fcaa174a9c99 ("scsi/sg: don't grab scsi host module reference")
Reported-by: Marc Hartmayer <mhartmay@xxxxxxxxxxxxx>
Closes: https://lore.kernel.org/all/87lefv622n.fsf@xxxxxxxxxxxxx/
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/scsi/sg.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 89fa046c7158..0d8afffd1683 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1497,9 +1497,10 @@ sg_add_device(struct device *cl_dev)
int error;
unsigned long iflags;
- error = blk_get_queue(scsidp->request_queue);
- if (error)
- return error;
+ if (!blk_get_queue(scsidp->request_queue)) {
+ pr_warn("%s: get scsi_device queue failed\n", __func__);
+ return -ENODEV;
+ }
error = -ENOMEM;
cdev = cdev_alloc();
--
2.39.2
