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scsi: core: Clean up scsi_dev_queue_ready()

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This is just a cleanup for scsi_dev_queue_ready() to avoid a redundant goto
and if statement. No functional change.

Signed-off-by: Wenchao Hao <haowenchao2@huawei.com>
Link: https://lore.kernel.org/r/20231018113746.1940197-2-haowenchao2@huawei.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Wenchao Hao 2023-10-18 19:37:45 +08:00 committed by Martin K. Petersen
parent 0b1b4b0444
commit 3dc985bfbd
1 changed files with 15 additions and 17 deletions
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32
drivers/scsi/scsi_lib.c
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@ -1251,28 +1251,26 @@ static inline int scsi_dev_queue_ready(struct request_queue *q,
int token;
token = sbitmap_get(&sdev->budget_map);
if (atomic_read(&sdev->device_blocked)) {
if (token < 0)
goto out;
if (token < 0)
return -1;
if (scsi_device_busy(sdev) > 1)
goto out_dec;
if (!atomic_read(&sdev->device_blocked))
return token;
/*
* unblock after device_blocked iterates to zero
*/
if (atomic_dec_return(&sdev->device_blocked) > 0)
goto out_dec;
SCSI_LOG_MLQUEUE(3, sdev_printk(KERN_INFO, sdev,
"unblocking device at zero depth\n"));
/*
* Only unblock if no other commands are pending and
* if device_blocked has decreased to zero
*/
if (scsi_device_busy(sdev) > 1 ||
atomic_dec_return(&sdev->device_blocked) > 0) {
sbitmap_put(&sdev->budget_map, token);
return -1;
}
SCSI_LOG_MLQUEUE(3, sdev_printk(KERN_INFO, sdev,
"unblocking device at zero depth\n"));
return token;
out_dec:
if (token >= 0)
sbitmap_put(&sdev->budget_map, token);
out:
return -1;
}
/*