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staging: android: ram_console: fix crash in ram_console_late_init 

If the persistent ram buffer is not available, ram_console_late_init
would crash when dereferencing ram_console_zone.  Return early if
ram console was not initialized.

CC: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Cross 2012-03-07 17:34:37 -08:00 committed by Greg Kroah-Hartman
parent a15d0b365e
commit 3a21138d3f
1 changed files with 3 additions and 0 deletions
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3
drivers/staging/android/ram_console.c
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@ -150,6 +150,9 @@ static int __init ram_console_late_init(void)
struct proc_dir_entry *entry;
struct persistent_ram_zone *prz = ram_console_zone;
if (!prz)
return 0;
if (persistent_ram_old_size(prz) == 0)
return 0;