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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-11-22 23:08:10 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-11-23 21:03:38 +0100 |
| commit | bb58dd5d1ffad6c2d21c69698ba766dad4ae54e6 (patch) | |
| tree | aedde5149df5e3eb8c217b90540222ee507d5e9e /kernel/power | |
| parent | f10cdea68b70bd85706baed0decab59618f9c353 (diff) | |
| download | lwn-bb58dd5d1ffad6c2d21c69698ba766dad4ae54e6.tar.gz lwn-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.c | 16 |
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; } /** |