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scsi: sg: Fix checking return value of blk_get_queue() 

Commit fcaa174a9c ("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: fcaa174a9c ("scsi/sg: don't grab scsi host module reference")
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Closes: https://lore.kernel.org/all/87lefv622n.fsf@linux.ibm.com/
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20230705024001.177585-1-yukuai1@huaweicloud.com
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Yu Kuai 2023-07-05 10:40:01 +08:00 committed by Martin K. Petersen
parent f4d1a8e011
commit 80b6051085
1 changed files with 4 additions and 3 deletions
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7
drivers/scsi/sg.c
View File

@ -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();