linux-omap-* 2.6.29: add l1 cache performance tweak from l-a-k ml

* also sync patch between pm and regular kernels

1 files changed, 56 insertions, 0 deletions

diff --git a/recipes/linux/linux-omap-pm-2.6.29/musb/0012-musb-fix-possible-panic-while-resuming.patch b/recipes/linux/linux-omap-pm-2.6.29/musb/0012-musb-fix-possible-panic-while-resuming.patch
new file mode 100644
index 0000000000..2bbde84c16
--- /dev/null
+++ b/recipes/linux/linux-omap-pm-2.6.29/musb/0012-musb-fix-possible-panic-while-resuming.patch
@@ -0,0 +1,56 @@
+From b9a61b80ea89d9d6d78a23d96a28df94fd612298 Mon Sep 17 00:00:00 2001
+From: Kim Kyuwon <q1.kim-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
+Date: Thu, 26 Mar 2009 18:56:51 -0700
+Subject: [PATCH] musb: fix possible panic while resuming
+
+During driver resume processing, musb could cause a kernel panic.
+Fix by enabling the clock earlier, with the resume_early method.
+
+Signed-off-by: Kim Kyuwon <q1.kim-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
+Signed-off-by: David Brownell <dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
+---
+ drivers/usb/musb/musb_core.c |    8 ++------
+ 1 files changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
+index 338cd16..3019725 100644
+--- a/drivers/usb/musb/musb_core.c
++++ b/drivers/usb/musb/musb_core.c
+@@ -2170,16 +2170,13 @@ static int musb_suspend(struct platform_device *pdev, pm_message_t message)
+ 	return 0;
+ }
+ 
+-static int musb_resume(struct platform_device *pdev)
++static int musb_resume_early(struct platform_device *pdev)
+ {
+-	unsigned long	flags;
+ 	struct musb	*musb = dev_to_musb(&pdev->dev);
+ 
+ 	if (!musb->clock)
+ 		return 0;
+ 
+-	spin_lock_irqsave(&musb->lock, flags);
+-
+ 	if (musb->set_clock)
+ 		musb->set_clock(musb->clock, 1);
+ 	else
+@@ -2189,7 +2186,6 @@ static int musb_resume(struct platform_device *pdev)
+ 	 * unless for some reason the whole soc powered down and we're
+ 	 * not treating that as a whole-system restart (e.g. swsusp)
+ 	 */
+-	spin_unlock_irqrestore(&musb->lock, flags);
+ 	return 0;
+ }
+ 
+@@ -2207,7 +2203,7 @@ static struct platform_driver musb_driver = {
+ 	.remove		= __devexit_p(musb_remove),
+ 	.shutdown	= musb_shutdown,
+ 	.suspend	= musb_suspend,
+-	.resume		= musb_resume,
++	.resume_early	= musb_resume_early,
+ };
+ 
+ /*-------------------------------------------------------------------------*/
+-- 
+1.6.0.4
+