Commit 8e94a6f4 authored by Matt Redfearn's avatar Matt Redfearn Committed by Greg Kroah-Hartman

MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch

commit c25f8064 upstream.

Commit dda45f70 ("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: dda45f70 ("MIPS: Switch to the irq_stack in interrupts")
Signed-off-by: default avatarMatt 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: default avatarJames Hogan <james.hogan@imgtec.com>
Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4a1fe14b
...@@ -329,7 +329,7 @@ NESTED(except_vec_vi_handler, 0, sp) ...@@ -329,7 +329,7 @@ NESTED(except_vec_vi_handler, 0, sp)
PTR_ADD sp, t0, t1 PTR_ADD sp, t0, t1
2: 2:
jal plat_irq_dispatch jalr v0
/* Restore sp */ /* Restore sp */
move sp, s1 move sp, s1
......
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