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[ARM] Fix csumpartial corner case
author
Russell King
<rmk@dyn-67.arm.linux.org.uk>
Thu, 10 Nov 2005 11:40:53 +0000
(11:40 +0000)
committer
Russell King
<rmk+kernel@arm.linux.org.uk>
Thu, 10 Nov 2005 11:40:53 +0000
(11:40 +0000)
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>
arch/arm/lib/csumpartial.S
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diff --git
a/arch/arm/lib/csumpartial.S
b/arch/arm/lib/csumpartial.S
index
cb5e370
..
fe797cf
100644
(file)
--- 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