AuxXxilium/linux_dsm_epyc7002
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Merge branch 'v4.8-rc2-bcache-fixes' of https://bitbucket.org/ewheelerinc/linux into for-linus

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Eric writes:

Please pull this bcache branch based on v4.8-rc2.  These fix one
deadlock, one use blkdev_put() use counter, and one dmesg output with a
better pr_err() description.
This commit is contained in:
Jens Axboe 2016-08-19 14:03:05 -06:00
commit cbaaf6ef0e
1 changed files with 10 additions and 4 deletions
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14
drivers/md/bcache/super.c
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@ -760,7 +760,8 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size,
if (!d->nr_stripes ||
d->nr_stripes > INT_MAX ||
d->nr_stripes > SIZE_MAX / sizeof(atomic_t)) {
pr_err("nr_stripes too large");
pr_err("nr_stripes too large or invalid: %u (start sector beyond end of disk?)",
(unsigned)d->nr_stripes);
return -ENOMEM;
}
@ -1820,7 +1821,7 @@ static int cache_alloc(struct cache *ca)
free = roundup_pow_of_two(ca->sb.nbuckets) >> 10;
if (!init_fifo(&ca->free[RESERVE_BTREE], 8, GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
!init_fifo_exact(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_MOVINGGC], free, GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_NONE], free, GFP_KERNEL) ||
!init_fifo(&ca->free_inc, free << 2, GFP_KERNEL) ||
@ -1844,7 +1845,7 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
struct block_device *bdev, struct cache *ca)
{
char name[BDEVNAME_SIZE];
const char *err = NULL;
const char *err = NULL; /* must be set for any error case */
int ret = 0;
memcpy(&ca->sb, sb, sizeof(struct cache_sb));
@ -1861,8 +1862,13 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
ca->discard = CACHE_DISCARD(&ca->sb);
ret = cache_alloc(ca);
if (ret != 0)
if (ret != 0) {
if (ret == -ENOMEM)
err = "cache_alloc(): -ENOMEM";
else
err = "cache_alloc(): unknown error";
goto err;
}
if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache")) {
err = "error calling kobject_add";