linux-kernel - [PATCH v4 1/2] dm suspend: return -ERESTARTSYS instead of -EINTR

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Message-ID: <75a5ffa-47b6-8a1e-7d8-0c310401284@redhat.com>
Date: Tue, 13 Aug 2024 12:38:51 +0200 (CEST)
From: Mikulas Patocka <mpatocka@...hat.com>
To: Alasdair Kergon <agk@...hat.com>, Mike Snitzer <snitzer@...nel.org>, 
    dm-devel@...ts.linux.dev, linux-kernel@...r.kernel.org, 
    Khazhismel Kumykov <khazhy@...gle.com>, 
    Zdenek Kabelac <zdenek.kabelac@...il.com>
Subject: [PATCH v4 1/2] dm suspend: return -ERESTARTSYS instead of -EINTR

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

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@...hat.com>
Cc: stable@...r.kernel.org

---
 drivers/md/dm.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6/drivers/md/dm.c
===================================================================
--- linux-2.6.orig/drivers/md/dm.c	2024-07-30 14:06:55.000000000 +0200
+++ linux-2.6/drivers/md/dm.c	2024-07-31 18:10:21.000000000 +0200
@@ -2737,7 +2737,7 @@ static int dm_wait_for_bios_completion(s
 			break;
 
 		if (signal_pending_state(task_state, current)) {
-			r = -EINTR;
+			r = -ERESTARTSYS;
 			break;
 		}
 
@@ -2762,7 +2762,7 @@ static int dm_wait_for_completion(struct
 			break;
 
 		if (signal_pending_state(task_state, current)) {
-			r = -EINTR;
+			r = -ERESTARTSYS;
 			break;
 		}