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authorJiri Bohac <jbohac@suse.cz>2009-09-02 05:00:46 -0400
committerTony Luck <tony.luck@intel.com>2009-09-02 12:14:48 -0400
commit5afe18d2f58812f3924edbd215464e5e3e8545e7 (patch)
tree52d2b9272cce5b3343317c56ba408dd3c28d4331 /arch
parentf2486f26692433ba27cc10991a085b503b0422a3 (diff)
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/lib/ip_fast_csum.S8
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 1f86aeb2c948..620d9dc5220f 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)
96GLOBAL_ENTRY(csum_ipv6_magic) 96GLOBAL_ENTRY(csum_ipv6_magic)
97 ld4 r20=[in0],4 97 ld4 r20=[in0],4
98 ld4 r21=[in1],4 98 ld4 r21=[in1],4
99 dep r15=in3,in2,32,16 99 zxt4 in2=in2
100 ;; 100 ;;
101 ld4 r22=[in0],4 101 ld4 r22=[in0],4
102 ld4 r23=[in1],4 102 ld4 r23=[in1],4
103 mux1 r15=r15,@rev 103 dep r15=in3,in2,32,16
104 ;; 104 ;;
105 ld4 r24=[in0],4 105 ld4 r24=[in0],4
106 ld4 r25=[in1],4 106 ld4 r25=[in1],4
107 shr.u r15=r15,16 107 mux1 r15=r15,@rev
108 add r16=r20,r21 108 add r16=r20,r21
109 add r17=r22,r23 109 add r17=r22,r23
110 zxt4 in4=in4
110 ;; 111 ;;
111 ld4 r26=[in0],4 112 ld4 r26=[in0],4
112 ld4 r27=[in1],4 113 ld4 r27=[in1],4
114 shr.u r15=r15,16
113 add r18=r24,r25 115 add r18=r24,r25
114 add r8=r16,r17 116 add r8=r16,r17
115 ;; 117 ;;