diff options
| author | Yao Cheng <saturdaycoder@gmail.com> | 2011-08-10 15:11:16 +0800 |
|---|---|---|
| committer | Shinya Kuribayashi <skuribay@pobox.com> | 2011-09-03 10:43:45 +0900 |
| commit | dc344589ded4fb4d63ba7f0cdf670e2ffcf5e5a0 (patch) | |
| tree | c75ea0e6061e2dd40ef82d4a131818e8e65b2621 /arch/mips | |
| parent | a1118d60423c1fe25afc9df9015f72739f96fd67 (diff) | |
MIPS: mips32: fix wrong loop bound in flush_cache()
The issue is found when calling flush_cache() with zero "size" argument.
The bound of loop is miscalculated in this case and flush_cache() enters
a wrong flushing loop.
Signed-off-by: Yao Cheng <saturdaycoder@gmail.com>
Cc: Shinya Kuribayashi <skuribay@pobox.com>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/cpu/mips32/cpu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/cpu/mips32/cpu.c b/arch/mips/cpu/mips32/cpu.c index 3ae397c8e..7b49e1b61 100644 --- a/arch/mips/cpu/mips32/cpu.c +++ b/arch/mips/cpu/mips32/cpu.c @@ -56,6 +56,10 @@ void flush_cache(ulong start_addr, ulong size) unsigned long addr = start_addr & ~(lsize - 1); unsigned long aend = (start_addr + size - 1) & ~(lsize - 1); + /* aend will be miscalculated when size is zero, so we return here */ + if (size == 0) + return; + while (1) { cache_op(Hit_Writeback_Inv_D, addr); cache_op(Hit_Invalidate_I, addr); |