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

[Christoph Hellwig]

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 <h...@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