block: print symbolic error name instead of error code

[ Upstream commit 25c1772 ]

Utilize the %pe print specifier to get the symbolic error name as a
string (i.e "-ENOMEM") in the log message instead of the error code to
increase its readablility.

This change was suggested in
https://lore.kernel.org/all/92972476-0b1f-4d0a-9951-af3fc8bc6e65@suswa.mountain/

Signed-off-by: Christian Heusel <christian@heusel.eu>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240111231521.1596838-1-christian@heusel.eu
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 26e197b ("block: fix potential invalid pointer dereference in blk_add_partition")
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: christian-heusel

block/partitions/core.c

@@ -575,8 +575,8 @@ static bool blk_add_partition(struct gendisk *disk,
 	part = add_partition(disk, p, from, size, state->parts[p].flags,
 			     &state->parts[p].info);
 	if (IS_ERR(part) && PTR_ERR(part) != -ENXIO) {
-		printk(KERN_ERR " %s: p%d could not be added: %ld\n",
-		       disk->disk_name, p, -PTR_ERR(part));
+		printk(KERN_ERR " %s: p%d could not be added: %pe\n",
+		       disk->disk_name, p, part);
 		return true;
 	}