From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 12 Jul 2017 07:26:34 +0000 (+0300)
Subject: dm bufio: fix error code in dm_bufio_write_dirty_buffers()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=edc11d49f88e3281457853a530c9e5a5540b355a;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

dm bufio: fix error code in dm_bufio_write_dirty_buffers()

We should be returning normal negative error codes here.  The "a"
variables comes from &c->async_write_error which is a blk_status_t
converted to a regular error code.

In the current code, the blk_status_t gets propogated back to
pool_create() and eventually results in an Oops.

Fixes: 4e4cbee93d56 ("block: switch bios to blk_status_t")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 850ff6c67994..44f4a8ac95bd 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1258,8 +1258,7 @@ EXPORT_SYMBOL_GPL(dm_bufio_write_dirty_buffers_async);
  */
 int dm_bufio_write_dirty_buffers(struct dm_bufio_client *c)
 {
-	blk_status_t a;
-	int f;
+	int a, f;
 	unsigned long buffers_processed = 0;
 	struct dm_buffer *b, *tmp;