linux-kernel - Re: 32-rc1 aka 32-rc2: warning at manage.c:361 (set_irq

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Message-ID: <20100102152723.GA10476@ucw.cz>
Date:	Sat, 2 Jan 2010 16:27:24 +0100
From:	Pavel Machek <pavel@....cz>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Eric Miao <eric.y.miao@...il.com>, rpurdie@...ys.net,
	lenz@...wisc.edu, kernel list <linux-kernel@...r.kernel.org>,
	Dirk@...er-online.de, arminlitzel@....de,
	Cyril Hrubis <metan@....cz>, thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	dbaryshkov@...il.com, omegamoon@...il.com, utx@...guin.cz,
	linux-input@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: 32-rc1 aka 32-rc2: warning at manage.c:361 (set_irq_wake),
	matrix-keypad related?

On Sat 2010-01-02 14:56:09, Pavel Machek wrote:
> Hi!
> 
> > > > We ignore the failure right now in the mainline but that causes stack
> > > > traces on resume as we trying to disable not enabled wakeup GPIOs. That
> > > > was original Pavel's complaint.
> > > 
> > > Yep...
> > > 
> > > I'd say that BUG() simply should not trigger if wakeup can not be
> > > enabled/disabled for particular source...?
> > 
> > Pavel,
> > 
> > Could you please try the patch below and let me know if it fixes the
> > problem for you?
> 
> (sorry for long delay).
> 
> With 33-rc1+your patch, warnings are no longer there. 
> 
> I still have one on irq191, but that's gpio button driver.
> 
> But please, hold the patch for few more days. I may have cleaner/nicer
> solution. It seems that zaurus is doing something very stupid in low
> layers.

I'm thinking that maybe something like this should do the trick.

--- ./arch/arm.ofic/mach-pxa/mfp-pxa2xx.c	2009-09-10 00:13:59.000000000 +0200
+++ ./arch/arm/mach-pxa/mfp-pxa2xx.c	2009-12-29 03:16:40.000000000 +0100
@@ -34,7 +34,6 @@
 struct gpio_desc {
 	unsigned	valid		: 1;
 	unsigned	can_wakeup	: 1;
-	unsigned	keypad_gpio	: 1;
 	unsigned	dir_inverted	: 1;
 	unsigned int	mask; /* bit mask in PWER or PKWR */
 	unsigned int	mux_mask; /* bit mask of muxed gpio bits, 0 if no mux */
@@ -178,9 +177,6 @@
 	if (!d->valid)
 		return -EINVAL;
 
-	if (d->keypad_gpio)
-		return -EINVAL;
-
 	mux_taken = (PWER & d->mux_mask) & (~d->mask);
 	if (on && mux_taken)
 		return -EBUSY;
@@ -231,32 +227,6 @@
 #endif /* CONFIG_PXA25x */
 
 #ifdef CONFIG_PXA27x
-static int pxa27x_pkwr_gpio[] = {
-	13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94,
-	95, 96, 97, 98, 99, 100, 101, 102
-};
-
-int keypad_set_wake(unsigned int on)
-{
-	unsigned int i, gpio, mask = 0;
-
-	if (!on) {
-		PKWR = 0;
-		return 0;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
-
-		gpio = pxa27x_pkwr_gpio[i];
-
-		if (gpio_desc[gpio].config & MFP_LPM_CAN_WAKEUP)
-			mask |= gpio_desc[gpio].mask;
-	}
-
-	PKWR = mask;
-	return 0;
-}
-
 #define PWER_WEMUX2_GPIO38	(1 << 16)
 #define PWER_WEMUX2_GPIO53	(2 << 16)
 #define PWER_WEMUX2_GPIO40	(3 << 16)
@@ -273,6 +243,12 @@
 	gpio_desc[(gpio)].mux_mask = PWER_ ## mux ## _MASK;	\
 } while (0)
 
+
+static int pxa27x_pkwr_gpio[] = {
+	13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94,
+	95, 96, 97, 98, 99, 100, 101, 102
+};
+
 static void __init pxa27x_mfp_init(void)
 {
 	int i, gpio;
@@ -291,7 +267,6 @@
 	for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
 		gpio = pxa27x_pkwr_gpio[i];
 		gpio_desc[gpio].can_wakeup = 1;
-		gpio_desc[gpio].keypad_gpio = 1;
 		gpio_desc[gpio].mask = 1 << i;
 	}
 
--- ./arch/arm.ofic/mach-pxa/pxa27x.c	2009-09-10 00:13:59.000000000 +0200
+++ ./arch/arm/mach-pxa/pxa27x.c	2009-12-29 03:13:00.000000000 +0100
@@ -323,9 +323,6 @@
 	if (gpio >= 0 && gpio < 128)
 		return gpio_set_wake(gpio, on);
 
-	if (irq == IRQ_KEYPAD)
-		return keypad_set_wake(on);
-
 	switch (irq) {
 	case IRQ_RTCAlrm:
 		mask = PWER_RTC;



-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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