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- From de856416e7143e32afc4849625616554aa060f7a Mon Sep 17 00:00:00 2001
- From: Matt Redfearn <matt.redfearn@imgtec.com>
- Date: Wed, 25 Jan 2017 17:00:25 +0000
- Subject: [PATCH] MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch
- Commit dda45f701c9d ("MIPS: Switch to the irq_stack in interrupts")
- changed both the normal and vectored interrupt handlers. Unfortunately
- the vectored version, "except_vec_vi_handler", was incorrectly modified
- to unconditionally jal to plat_irq_dispatch, rather than doing a jalr to
- the vectored handler that has been set up. This is ok for many platforms
- which set the vectored handler to plat_irq_dispatch anyway, but will
- cause problems with platforms that use other handlers.
- Fixes: dda45f701c9d ("MIPS: Switch to the irq_stack in interrupts")
- Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
- Cc: Ralf Baechle <ralf@linux-mips.org>
- Cc: Paul Burton <paul.burton@imgtec.com>
- Cc: linux-mips@linux-mips.org
- Patchwork: https://patchwork.linux-mips.org/patch/15110/
- Signed-off-by: James Hogan <james.hogan@imgtec.com>
- ---
- arch/mips/kernel/genex.S | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
- --- a/arch/mips/kernel/genex.S
- +++ b/arch/mips/kernel/genex.S
- @@ -330,7 +330,7 @@ NESTED(except_vec_vi_handler, 0, sp)
- PTR_ADD sp, t0, t1
-
- 2:
- - jal plat_irq_dispatch
- + jalr v0
-
- /* Restore sp */
- move sp, s1
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