[PATCH 3.10 036/139] MIPS: Actually decode JALX in `__compute_return_epc_for_insn'

[Willy Tarreau]

From: "Maciej W. Rozycki" <macro@xxxxxxxxxx>

commit a9db101b735a9d49295326ae41f610f6da62b08c upstream.

Complement commit fb6883e5809c ("MIPS: microMIPS: Support handling of
delay slots.") and actually decode the regular MIPS JALX major
instruction opcode, the handling of which has been added with the said
commit for EPC calculation in `__compute_return_epc_for_insn'.

Fixes: fb6883e5809c ("MIPS: microMIPS: Support handling of delay slots.")
Signed-off-by: Maciej W. Rozycki <macro@xxxxxxxxxx>
Cc: James Hogan <james.hogan@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx 
Patchwork: https://patchwork.linux-mips.org/patch/16394/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
 arch/mips/kernel/branch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index 9250996..63b942f 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -297,6 +297,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
 	/*
 	 * These are unconditional and in j_format.
 	 */
+	case jalx_op:
 	case jal_op:
 		regs->regs[31] = regs->cp0_epc + 8;
 	case j_op:
-- 
2.8.0.rc2.1.gbe9624a