linux-kernel - [PATCH 3.15 105/109] gpio: dwapb: drop irq_setup_generic

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Date:	Sat, 26 Jul 2014 12:03:07 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Alan Tull <delicious.quinoa@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	dann frazier <dann.frazier@...onical.com>
Subject: [PATCH 3.15 105/109] gpio: dwapb: drop irq_setup_generic_chip()

3.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

commit 11d3d334af07408ce3a68860c40006ddcd343da5 upstream.

The driver calls irq_alloc_domain_generic_chips() which creates a gc and
adds it to gc_list. The driver later then calls irq_setup_generic_chip()
which also initializes the gc and adds it to the gc_list() and this
corrupts the list. Enable LIST_DEBUG and you see the kernel complain.
This isn't required, irq_alloc_domain_generic_chips() did the init.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Tested-by: Alan Tull <delicious.quinoa@...il.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: dann frazier <dann.frazier@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpio/gpio-dwapb.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -260,9 +260,6 @@ static void dwapb_configure_irqs(struct
 	ct->regs.ack = GPIO_PORTA_EOI;
 	ct->regs.mask = GPIO_INTMASK;
 
-	irq_setup_generic_chip(irq_gc, IRQ_MSK(port->bgc.gc.ngpio),
-			IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
-
 	irq_set_chained_handler(irq, dwapb_irq_handler);
 	irq_set_handler_data(irq, gpio);
 


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