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authorLuis Chamberlain <mcgrof@kernel.org>2021-09-28 01:03:00 +0300
committerJens Axboe <axboe@kernel.dk>2021-10-18 23:41:37 +0300
commit573effb298011d3fcabc9b12025cf637f8a07911 (patch)
tree3d6ee6512b4c34654bd40c68002f7ce952499bb1 /drivers/block/ataflop.c
parent44a469b6acae6ad05c4acca8429467d1d50a8b8d (diff)
downloadlinux-573effb298011d3fcabc9b12025cf637f8a07911.tar.xz
block/ataflop: add registration bool before calling del_gendisk()
The ataflop assumes del_gendisk() is safe to call, this is only true because add_disk() does not return a failure, but that will change soon. And so, before we get to adding error handling for that case, let's make sure we keep track of which disks actually get registered. Then we use this to only call del_gendisk for them. Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> Link: https://lore.kernel.org/r/20210927220302.1073499-13-mcgrof@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/ataflop.c')
-rw-r--r--drivers/block/ataflop.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index bc8cf7a991af..fe16105ecdf5 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -299,6 +299,7 @@ static struct atari_floppy_struct {
disk change detection) */
int flags; /* flags */
struct gendisk *disk[NUM_DISK_MINORS];
+ bool registered[NUM_DISK_MINORS];
int ref;
int type;
struct blk_mq_tag_set tag_set;
@@ -2001,8 +2002,10 @@ static void ataflop_probe(dev_t dev)
return;
mutex_lock(&ataflop_probe_lock);
if (!unit[drive].disk[type]) {
- if (ataflop_alloc_disk(drive, type) == 0)
+ if (ataflop_alloc_disk(drive, type) == 0) {
add_disk(unit[drive].disk[type]);
+ unit[drive].registered[type] = true;
+ }
}
mutex_unlock(&ataflop_probe_lock);
}
@@ -2066,6 +2069,7 @@ static int __init atari_floppy_init (void)
unit[i].track = -1;
unit[i].flags = 0;
add_disk(unit[i].disk[0]);
+ unit[i].registered[0] = true;
}
printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
@@ -2134,7 +2138,8 @@ static void __exit atari_floppy_exit(void)
for (type = 0; type < NUM_DISK_MINORS; type++) {
if (!unit[i].disk[type])
continue;
- del_gendisk(unit[i].disk[type]);
+ if (unit[i].registered[type])
+ del_gendisk(unit[i].disk[type]);
blk_cleanup_disk(unit[i].disk[type]);
}
blk_mq_free_tag_set(&unit[i].tag_set);