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| author | Jiri Bohac <jbohac@suse.cz> | 2009-09-02 11:00:46 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2009-09-02 09:14:48 -0700 |
| commit | 5afe18d2f58812f3924edbd215464e5e3e8545e7 (patch) | |
| tree | 52d2b9272cce5b3343317c56ba408dd3c28d4331 | |
| parent | f2486f26692433ba27cc10991a085b503b0422a3 (diff) | |
| download | linux-3.10-5afe18d2f58812f3924edbd215464e5e3e8545e7.tar.gz linux-3.10-5afe18d2f58812f3924edbd215464e5e3e8545e7.tar.bz2 linux-3.10-5afe18d2f58812f3924edbd215464e5e3e8545e7.zip | |
[IA64] fix csum_ipv6_magic()
The 32-bit parameters (len and csum) of csum_ipv6_magic() are passed in 64-bit
registers in2 and in4. The high order 32 bits of the registers were never
cleared, and garbage was sometimes calculated into the checksum.
Fix this by clearing the high order 32 bits of these registers.
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>
| -rw-r--r-- | arch/ia64/lib/ip_fast_csum.S | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/ia64/lib/ip_fast_csum.S b/arch/ia64/lib/ip_fast_csum.S index 1f86aeb2c94..620d9dc5220 100644 --- a/arch/ia64/lib/ip_fast_csum.S +++ b/arch/ia64/lib/ip_fast_csum.S @@ -96,20 +96,22 @@ END(ip_fast_csum) GLOBAL_ENTRY(csum_ipv6_magic) ld4 r20=[in0],4 ld4 r21=[in1],4 - dep r15=in3,in2,32,16 + zxt4 in2=in2 ;; ld4 r22=[in0],4 ld4 r23=[in1],4 - mux1 r15=r15,@rev + dep r15=in3,in2,32,16 ;; ld4 r24=[in0],4 ld4 r25=[in1],4 - shr.u r15=r15,16 + mux1 r15=r15,@rev add r16=r20,r21 add r17=r22,r23 + zxt4 in4=in4 ;; ld4 r26=[in0],4 ld4 r27=[in1],4 + shr.u r15=r15,16 add r18=r24,r25 add r8=r16,r17 ;; |