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| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | 2011-12-01 22:33:10 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-12-06 22:07:59 +0100 |
| commit | 97819a26224f019e73d88bb2fd4eb5a614860461 (patch) | |
| tree | d7bb2f83b2564d4f2bf111e2eb3bc1f4714b342e /kernel | |
| parent | 0118521cc7acb3ccbc1a01d6144ac32be9d56a4c (diff) | |
| download | linux-97819a26224f019e73d88bb2fd4eb5a614860461.tar.bz2 | |
PM / Hibernate: Thaw processes in SNAPSHOT_CREATE_IMAGE ioctl test path
Commit 2aede851ddf08666f68ffc17be446420e9d2a056 (PM / Hibernate: Freeze
kernel threads after preallocating memory) moved the freezing of kernel
threads to hibernation_snapshot() function.
So now, if the call to hibernation_snapshot() returns early due to a
successful hibernation test, the caller has to thaw processes to ensure
that the system gets back to its original state.
But in SNAPSHOT_CREATE_IMAGE hibernation ioctl, the caller does not thaw
processes in case hibernation_snapshot() returned due to a successful
freezer test. Fix this issue. But note we still send the value of 'in_suspend'
(which is now 0) to userspace, because we are not in an error path per-se,
and moreover, the value of in_suspend correctly depicts the situation here.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/hibernate.c | 2 | ||||
| -rw-r--r-- | kernel/power/power.h | 2 | ||||
| -rw-r--r-- | kernel/power/user.c | 11 |
3 files changed, 11 insertions, 4 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 1fcf9de4506d..c10cb0f916e2 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -55,7 +55,7 @@ enum { static int hibernation_mode = HIBERNATION_SHUTDOWN; -static bool freezer_test_done; +bool freezer_test_done; static const struct platform_hibernation_ops *hibernation_ops; diff --git a/kernel/power/power.h b/kernel/power/power.h index 23a2db1ec442..0c4defe6d3b8 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -50,6 +50,8 @@ static inline char *check_image_kernel(struct swsusp_info *info) #define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT) /* kernel/power/hibernate.c */ +extern bool freezer_test_done; + extern int hibernation_snapshot(int platform_mode); extern int hibernation_restore(int platform_mode); extern int hibernation_platform_enter(void); diff --git a/kernel/power/user.c b/kernel/power/user.c index 6d8f535c2b88..e2aff0fc2697 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -283,10 +283,15 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, } pm_restore_gfp_mask(); error = hibernation_snapshot(data->platform_support); - if (!error) + if (!error) { error = put_user(in_suspend, (int __user *)arg); - if (!error) - data->ready = 1; + if (!error && !freezer_test_done) + data->ready = 1; + if (freezer_test_done) { + freezer_test_done = false; + thaw_processes(); + } + } break; case SNAPSHOT_ATOMIC_RESTORE: |