[PATCH 14/30] gdrom: use blk_mq_alloc_disk

Christoph Hellwig
2021-06-02T06:55:39Z

Use the blk_mq_alloc_disk API to simplify the gendisk and request_queue
allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/cdrom/gdrom.c | 45 ++++++++++++++++++++-----------------------
1 file changed, 21 insertions(+), 24 deletions(-)

diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index c6d8c0f59722..8e1fe75af93f 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -772,53 +772,50 @@ static int probe_gdrom(struct platform_device *devptr)
goto probe_fail_no_mem;
}
probe_gdrom_setupcd();
- gd.disk = alloc_disk(1);
- if (!gd.disk) {
- err = -ENODEV;
- goto probe_fail_no_disk;
+
+ err = blk_mq_alloc_sq_tag_set(&gd.tag_set, &gdrom_mq_ops, 1,
+ BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING);
+ if (err)
+ goto probe_fail_free_cd_info;
+
+ gd.disk = blk_mq_alloc_disk(&gd.tag_set, NULL);
+ if (IS_ERR(gd.disk)) {
+ err = PTR_ERR(gd.disk);
+ goto probe_fail_free_tag_set;
}
+ gd.gdrom_rq = gd.disk->queue;
probe_gdrom_setupdisk();
if (register_cdrom(gd.disk, gd.cd_info)) {
err = -ENODEV;
- goto probe_fail_cdrom_register;
+ goto probe_fail_cleanup_disk;
}
gd.disk->fops = &gdrom_bdops;
gd.disk->events = DISK_EVENT_MEDIA_CHANGE;
/* latch on to the interrupt */
err = gdrom_set_interrupt_handlers();
if (err)
- goto probe_fail_cmdirq_register;
-
- gd.gdrom_rq = blk_mq_init_sq_queue(&gd.tag_set, &gdrom_mq_ops, 1,
- BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING);
- if (IS_ERR(gd.gdrom_rq)) {
- err = PTR_ERR(gd.gdrom_rq);
- gd.gdrom_rq = NULL;
- goto probe_fail_requestq;
- }
+ goto probe_fail_cleanup_disk;

err = probe_gdrom_setupqueue();
if (err)
- goto probe_fail_toc;
+ goto probe_fail_free_irqs;

gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL);
if (!gd.toc) {
err = -ENOMEM;
- goto probe_fail_toc;
+ goto probe_fail_free_irqs;
}
add_disk(gd.disk);
return 0;

-probe_fail_toc:
- blk_cleanup_queue(gd.gdrom_rq);
- blk_mq_free_tag_set(&gd.tag_set);
-probe_fail_requestq:
+probe_fail_free_irqs:
free_irq(HW_EVENT_GDROM_DMA, &gd);
free_irq(HW_EVENT_GDROM_CMD, &gd);
-probe_fail_cmdirq_register:
-probe_fail_cdrom_register:
- del_gendisk(gd.disk);
-probe_fail_no_disk:
+probe_fail_cleanup_disk:
+ blk_cleanup_disk(gd.disk);
+probe_fail_free_tag_set:
+ blk_mq_free_tag_set(&gd.tag_set);
+probe_fail_free_cd_info:
kfree(gd.cd_info);
probe_fail_no_mem:
unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
--
2.30.2