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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-11-10 14:40:53 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-11-10 14:40:53 +0300 |
| commit | af36bef0c5bb82f361ebb2f106f11d0f63dac887 (patch) | |
| tree | c8fcea1482c15fefc07044e2ff2a77a54310fb19 /arch/arm/lib/csumpartial.S | |
| parent | 3b44f137b9a846c5452d9e6e1271b79b1dbcc942 (diff) | |
| download | linux-af36bef0c5bb82f361ebb2f106f11d0f63dac887.tar.xz | |
[ARM] Fix csumpartial corner case
Ji-In Park discovered a bug in csumpartial which caused wrong
checksums with misaligned buffers.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/lib/csumpartial.S')
| -rw-r--r-- | arch/arm/lib/csumpartial.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/lib/csumpartial.S b/arch/arm/lib/csumpartial.S index cb5e3708f118..fe797cf320bb 100644 --- a/arch/arm/lib/csumpartial.S +++ b/arch/arm/lib/csumpartial.S @@ -39,6 +39,7 @@ td3 .req lr /* we must have at least one byte. */ tst buf, #1 @ odd address? + movne sum, sum, ror #8 ldrneb td0, [buf], #1 subne len, len, #1 adcnes sum, sum, td0, put_byte_1 @@ -103,6 +104,9 @@ ENTRY(csum_partial) cmp len, #8 @ Ensure that we have at least blo .less8 @ 8 bytes to copy. + tst buf, #1 + movne sum, sum, ror #8 + adds sum, sum, #0 @ C = 0 tst buf, #3 @ Test destination alignment blne .not_aligned @ aligh destination, return here |