The addiusp instruction uses the pool16d opcode, with bit 0 of the
immediate set. The test for the addiusp opcode erroneously did a logical
and of the immediate with mm_addiusp_func, which has value 1, so this
test always passes when the immediate is non-zero.
Fix the test by replacing the logical and with a bitwise and.
Fixes: 34c2f668d0f6 ("MIPS: microMIPS: Add unaligned access support.")
Signed-off-by: Matt Redfearn <matt.redfearn@xxxxxxxxxx>
---
Changes in v3:
- New patch to fix detection of addiusp instruction
Changes in v2: None
arch/mips/kernel/process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 5950ecf469e9..9d38faf01055 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -326,7 +326,7 @@ static inline int is_sp_move_ins(union mips_instruction *ip)
*/
if (mm_insn_16bit(ip->halfword[1])) {
return (ip->mm16_r3_format.opcode == mm_pool16d_op &&
- ip->mm16_r3_format.simmediate && mm_addiusp_func) ||
+ ip->mm16_r3_format.simmediate & mm_addiusp_func) ||
(ip->mm16_r5_format.opcode == mm_pool16d_op &&
ip->mm16_r5_format.rt == 29);
}
--
2.7.4
