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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2015-08-21 18:48:31 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-10-27 18:13:31 -0500 |
| commit | 9d28cc811bbb43c7ca8dc8be375bab1e0efb037b (patch) | |
| tree | 9cb238845d4856dec34f312209a1a802343a73c6 | |
| parent | 9100d20c5b6307bacd8756aba2f157cb1a8ffb56 (diff) | |
| download | linux-stable-9d28cc811bbb43c7ca8dc8be375bab1e0efb037b.tar.gz linux-stable-9d28cc811bbb43c7ca8dc8be375bab1e0efb037b.tar.bz2 linux-stable-9d28cc811bbb43c7ca8dc8be375bab1e0efb037b.zip | |
powerpc: handle error case in cpm_muram_alloc()
rh_alloc() returns (unsigned long)-ERRxx on error, which may
result in overwriting memory outside the MURAM AREA.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
| -rw-r--r-- | arch/powerpc/sysdev/cpm_common.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c index e2ea51961979..e00a5ee58fd7 100644 --- a/arch/powerpc/sysdev/cpm_common.c +++ b/arch/powerpc/sysdev/cpm_common.c @@ -147,7 +147,8 @@ unsigned long cpm_muram_alloc(unsigned long size, unsigned long align) spin_lock_irqsave(&cpm_muram_lock, flags); cpm_muram_info.alignment = align; start = rh_alloc(&cpm_muram_info, size, "commproc"); - memset_io(cpm_muram_addr(start), 0, size); + if (!IS_ERR_VALUE(start)) + memset_io(cpm_muram_addr(start), 0, size); spin_unlock_irqrestore(&cpm_muram_lock, flags); return start; |