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authorSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>2012-02-01 22:16:36 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2012-02-01 22:16:36 +0100
commitfe9161db2e6053da21e4649d77bbefaf3030b11d (patch)
tree3f875f40201455571280eef7a0c9fdc3c98e346e /kernel/power
parent62aa2b537c6f5957afd98e29f96897419ed5ebab (diff)
downloadlinux-fe9161db2e6053da21e4649d77bbefaf3030b11d.tar.bz2
PM / Hibernate: Thaw kernel threads in SNAPSHOT_CREATE_IMAGE ioctl path
In the SNAPSHOT_CREATE_IMAGE ioctl, if the call to hibernation_snapshot() fails, the frozen tasks are not thawed. And in the case of success, if we happen to exit due to a successful freezer test, all tasks (including those of userspace) are thawed, whereas actually we should have thawed only the kernel threads at that point. Fix both these issues. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: stable@vger.kernel.org
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/user.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c
index e5a21a857302..3e100075b13c 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -249,13 +249,15 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
}
pm_restore_gfp_mask();
error = hibernation_snapshot(data->platform_support);
- if (!error) {
+ if (error) {
+ thaw_kernel_threads();
+ } else {
error = put_user(in_suspend, (int __user *)arg);
if (!error && !freezer_test_done)
data->ready = 1;
if (freezer_test_done) {
freezer_test_done = false;
- thaw_processes();
+ thaw_kernel_threads();
}
}
break;