diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-04-12 22:06:56 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-13 22:37:07 +0400 |
| commit | c751085943362143f84346d274e0011419c84202 (patch) | |
| tree | 5323da4e3eba8126bf44e5107960ee2323d28a16 /kernel/power/disk.c | |
| parent | 7b11428d37fe65643172feff66cd0a4d72d1932a (diff) | |
| download | linux-c751085943362143f84346d274e0011419c84202.tar.xz | |
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.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 5f21ab2bbcdf..0854770b63b9 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 |