[PATCH 5.4 079/134] dm suspend: return -ERESTARTSYS instead of -EINTR

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5.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mikulas Patocka <mpatocka@xxxxxxxxxx>

[ Upstream commit 1e1fd567d32fcf7544c6e09e0e5bc6c650da6e23 ]

This commit changes device mapper, so that it returns -ERESTARTSYS
instead of -EINTR when it is interrupted by a signal (so that the ioctl
can be restarted).

The manpage signal(7) says that the ioctl function should be restarted if
the signal was handled with SA_RESTART.

Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/md/dm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index f6f5b68a6950b..3d00bb98d702b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2432,7 +2432,7 @@ static int dm_wait_for_bios_completion(struct mapped_device *md, long task_state
 			break;
 
 		if (signal_pending_state(task_state, current)) {
-			r = -EINTR;
+			r = -ERESTARTSYS;
 			break;
 		}
 
@@ -2457,7 +2457,7 @@ static int dm_wait_for_completion(struct mapped_device *md, long task_state)
 			break;
 
 		if (signal_pending_state(task_state, current)) {
-			r = -EINTR;
+			r = -ERESTARTSYS;
 			break;
 		}
 
-- 
2.43.0







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