From af36bef0c5bb82f361ebb2f106f11d0f63dac887 Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 10 Nov 2005 11:40:53 +0000 Subject: [PATCH] [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 --- arch/arm/lib/csumpartial.S | 4 ++++ 1 file changed, 4 insertions(+) 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 -- GitLab