aboutsummaryrefslogtreecommitdiff
path: root/kernel/power/disk.c
diff options
context:
space:
mode:
authorRafael J. Wysocki <rjw@sisk.pl>2009-04-12 20:06:56 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-13 11:37:07 -0700
commitc751085943362143f84346d274e0011419c84202 (patch)
tree5323da4e3eba8126bf44e5107960ee2323d28a16 /kernel/power/disk.c
parent7b11428d37fe65643172feff66cd0a4d72d1932a (diff)
PM/Hibernate: Wait for SCSI devices scan to complete during resume
There is a race between resume from hibernation and the asynchronous scanning of SCSI devices and to prevent it from happening we need to call scsi_complete_async_scans() during resume from hibernation. In addition, if the resume from hibernation is userland-driven, it's better to wait for all device probes in the kernel to complete before attempting to open the resume device. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/power/disk.c')
-rw-r--r--kernel/power/disk.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 5f21ab2bbcd..0854770b63b 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -22,6 +22,7 @@
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
+#include <scsi/scsi_scan.h>
#include <asm/suspend.h>
#include "power.h"
@@ -645,6 +646,13 @@ static int software_resume(void)
return 0;
/*
+ * We can't depend on SCSI devices being available after loading one of
+ * their modules if scsi_complete_async_scans() is not called and the
+ * resume device usually is a SCSI one.
+ */
+ scsi_complete_async_scans();
+
+ /*
* name_to_dev_t() below takes a sysfs buffer mutex when sysfs
* is configured into the kernel. Since the regular hibernate
* trigger path is via sysfs which takes a buffer mutex before