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authorRafael J. Wysocki <rjw@sisk.pl>2011-11-22 23:08:10 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2011-11-23 21:03:38 +0100
commitbb58dd5d1ffad6c2d21c69698ba766dad4ae54e6 (patch)
treeaedde5149df5e3eb8c217b90540222ee507d5e9e /kernel/power
parentf10cdea68b70bd85706baed0decab59618f9c353 (diff)
downloadblackbird-op-linux-bb58dd5d1ffad6c2d21c69698ba766dad4ae54e6.tar.gz
blackbird-op-linux-bb58dd5d1ffad6c2d21c69698ba766dad4ae54e6.zip
PM / Hibernate: Do not leak memory in error/test code paths
The hibernation core code forgets to release memory preallocated for hibernation if there's an error in its early stages or if test modes causing hibernation_snapshot() to return early are used. This causes the system to be hardly usable, because the amount of preallocated memory is usually huge. Fix this problem. Reported-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/hibernate.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 196c01268ebd..a6b0503574ee 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -347,7 +347,7 @@ int hibernation_snapshot(int platform_mode)
error = freeze_kernel_threads();
if (error)
- goto Close;
+ goto Cleanup;
if (hibernation_test(TEST_FREEZER) ||
hibernation_testmode(HIBERNATION_TESTPROC)) {
@@ -357,12 +357,14 @@ int hibernation_snapshot(int platform_mode)
* successful freezer test.
*/
freezer_test_done = true;
- goto Close;
+ goto Cleanup;
}
error = dpm_prepare(PMSG_FREEZE);
- if (error)
- goto Complete_devices;
+ if (error) {
+ dpm_complete(msg);
+ goto Cleanup;
+ }
suspend_console();
pm_restrict_gfp_mask();
@@ -391,8 +393,6 @@ int hibernation_snapshot(int platform_mode)
pm_restore_gfp_mask();
resume_console();
-
- Complete_devices:
dpm_complete(msg);
Close:
@@ -402,6 +402,10 @@ int hibernation_snapshot(int platform_mode)
Recover_platform:
platform_recover(platform_mode);
goto Resume_devices;
+
+ Cleanup:
+ swsusp_free();
+ goto Close;
}
/**
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