[PATCH 20/26] simdisk: convert to blk_alloc_disk/blk_cleanup_disk

Christoph Hellwig
2021-05-21T05:52:55Z

Convert the simdisk driver to use the blk_alloc_disk and blk_cleanup_disk
helpers to simplify gendisk and request_queue allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/xtensa/platforms/iss/simdisk.c | 29 +++++++----------------------
1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
index fc09be7b1347..3cdfa00738e0 100644
--- a/arch/xtensa/platforms/iss/simdisk.c
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -27,7 +27,6 @@
struct simdisk {
const char *filename;
spinlock_t lock;
- struct request_queue *queue;
struct gendisk *gd;
struct proc_dir_entry *procfile;
int users;
@@ -266,21 +265,13 @@ static int __init simdisk_setup(struct simdisk *dev, int which,
spin_lock_init(&dev->lock);
dev->users = 0;

- dev->queue = blk_alloc_queue(NUMA_NO_NODE);
- if (dev->queue == NULL) {
- pr_err("blk_alloc_queue failed\n");
- goto out_alloc_queue;
- }
-
- dev->gd = alloc_disk(SIMDISK_MINORS);
- if (dev->gd == NULL) {
- pr_err("alloc_disk failed\n");
- goto out_alloc_disk;
- }
+ dev->gd = blk_alloc_disk(NUMA_NO_NODE);
+ if (!dev->gd)
+ return -ENOMEM;
dev->gd->major = simdisk_major;
dev->gd->first_minor = which;
+ dev->gd->minors = SIMDISK_MINORS;
dev->gd->fops = &simdisk_ops;
- dev->gd->queue = dev->queue;
dev->gd->private_data = dev;
snprintf(dev->gd->disk_name, 32, "simdisk%d", which);
set_capacity(dev->gd, 0);
@@ -288,12 +279,6 @@ static int __init simdisk_setup(struct simdisk *dev, int which,

dev->procfile = proc_create_data(tmp, 0644, procdir, &simdisk_proc_ops, dev);
return 0;
-
-out_alloc_disk:
- blk_cleanup_queue(dev->queue);
- dev->queue = NULL;
-out_alloc_queue:
- return -ENOMEM;
}

static int __init simdisk_init(void)
@@ -343,10 +328,10 @@ static void simdisk_teardown(struct simdisk *dev, int which,
char tmp[2] = { '0' + which, 0 };

simdisk_detach(dev);
- if (dev->gd)
+ if (dev->gd) {
del_gendisk(dev->gd);
- if (dev->queue)
- blk_cleanup_queue(dev->queue);
+ blk_cleanup_disk(dev->gd);
+ }
remove_proc_entry(tmp, procdir);
}

--
2.30.2