From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Matt Redfearn <matt.redfearn@imgtec.com>,
Ralf Baechle <ralf@linux-mips.org>,
Paul Burton <paul.burton@imgtec.com>,
linux-mips@linux-mips.org, James Hogan <james.hogan@imgtec.com>,
Amit Pundir <amit.pundir@linaro.org>
Subject: [PATCH 4.10 25/29] MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch
Date: Sun, 16 Apr 2017 10:04:42 +0200 [thread overview]
Message-ID: <20170416080230.069716108@linuxfoundation.org> (raw)
In-Reply-To: <20170416080227.593797230@linuxfoundation.org>
4.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Matt Redfearn <matt.redfearn@imgtec.com>
commit c25f8064c1d5731a2ce5664def890140dcdd3e5c upstream.
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>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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
@@ -329,7 +329,7 @@ NESTED(except_vec_vi_handler, 0, sp)
PTR_ADD sp, t0, t1
2:
- jal plat_irq_dispatch
+ jalr v0
/* Restore sp */
move sp, s1
prev parent reply other threads:[~2017-04-16 8:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170416080227.593797230@linuxfoundation.org>
2017-04-16 8:04 ` [PATCH 4.10 20/29] MIPS: Introduce irq_stack Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.10 21/29] MIPS: Stack unwinding while on IRQ stack Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.10 22/29] MIPS: Only change $28 to thread_info if coming from user mode Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.10 23/29] MIPS: Switch to the irq_stack in interrupts Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.10 24/29] MIPS: Select HAVE_IRQ_EXIT_ON_IRQ_STACK Greg Kroah-Hartman
2017-04-16 8:04 ` Greg Kroah-Hartman [this message]
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