This is a note to let you know that I've just added the patch titled
bus: omap_l3_noc: Correct returning IRQ_HANDLED
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bus-omap_l3_noc-correct-returning-irq_handled.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c4cf0935a2d8fe6d186bf4253ea3c4b4a8a8a710 Mon Sep 17 00:00:00 2001
From: Keerthy <j-keerthy@xxxxxx>
Date: Mon, 10 Nov 2014 23:49:48 +0530
Subject: bus: omap_l3_noc: Correct returning IRQ_HANDLED
unconditionally in the irq handler
From: Keerthy <j-keerthy@xxxxxx>
commit c4cf0935a2d8fe6d186bf4253ea3c4b4a8a8a710 upstream.
Correct returning IRQ_HANDLED unconditionally in the irq handler.
Return IRQ_NONE for some interrupt which we do not expect to be
handled in this handler. This prevents kernel stalling with back
to back spurious interrupts.
Fixes: 2722e56de6 ("OMAP4: l3: Introduce l3-interconnect error handling driver")
Acked-by: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Keerthy <j-keerthy@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/bus/omap_l3_noc.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -222,10 +222,14 @@ static irqreturn_t l3_interrupt_handler(
}
/* Error found so break the for loop */
- break;
+ return IRQ_HANDLED;
}
}
- return IRQ_HANDLED;
+
+ dev_err(l3->dev, "L3 %s IRQ not handled!!\n",
+ inttype ? "debug" : "application");
+
+ return IRQ_NONE;
}
static const struct of_device_id l3_noc_match[] = {
Patches currently in stable-queue which might be from j-keerthy@xxxxxx are
queue-3.18/bus-omap_l3_noc-correct-returning-irq_handled.patch
queue-3.18/bus-omap_l3_noc-add-resume-hook-to-restore-context.patch
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