This is a note to let you know that I've just added the patch titled
Revert "usb: dwc3: dwc3-omap: Disable/Enable only wrapper interrupts in prepare/complete"
to the 3.17-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:
revert-usb-dwc3-dwc3-omap-disable-enable-only-wrapper-interrupts-in-prepare-complete.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b01ff5cb2fc99d45e4edc97077b6e17186570a16 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@xxxxxx>
Date: Tue, 7 Oct 2014 09:40:57 -0500
Subject: Revert "usb: dwc3: dwc3-omap: Disable/Enable only wrapper interrupts in prepare/complete"
From: Roger Quadros <rogerq@xxxxxx>
commit b01ff5cb2fc99d45e4edc97077b6e17186570a16 upstream.
This reverts commit 02dae36aa649a66c5c6181157ddd806e7b4913fc.
That commit is bogus in two ways:
1) There's no way dwc3-omap's ->suspend() can cause any effect
on xhci's ->suspend(). Linux device driver model guarantees
that a parent's ->suspend() will only be called after all
children are suspended. dwc3-omap is the parent of the
parent of xhci.
2) When implementing Deep Sleep states where context is lost,
USBOTGSS_IRQ0 register, well, looses context so we
_must_ rewrite it otherwise core IRQs will never be
reenabled and USB will appear to be dead.
Fixes: 02dae36 (usb: dwc3: dwc3-omap: Disable/Enable only
wrapper interrupts in prepare/complete)
Cc: George Cherian <george.cherian@xxxxxx>
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/dwc3-omap.c | 15 ++-------------
1 file changed, 2 insertions(+), 13 deletions(-)
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -599,7 +599,7 @@ static int dwc3_omap_prepare(struct devi
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
- dwc3_omap_write_irqmisc_set(omap, 0x00);
+ dwc3_omap_disable_irqs(omap);
return 0;
}
@@ -607,19 +607,8 @@ static int dwc3_omap_prepare(struct devi
static void dwc3_omap_complete(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
- u32 reg;
- reg = (USBOTGSS_IRQMISC_OEVT |
- USBOTGSS_IRQMISC_DRVVBUS_RISE |
- USBOTGSS_IRQMISC_CHRGVBUS_RISE |
- USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
- USBOTGSS_IRQMISC_IDPULLUP_RISE |
- USBOTGSS_IRQMISC_DRVVBUS_FALL |
- USBOTGSS_IRQMISC_CHRGVBUS_FALL |
- USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
- USBOTGSS_IRQMISC_IDPULLUP_FALL);
-
- dwc3_omap_write_irqmisc_set(omap, reg);
+ dwc3_omap_enable_irqs(omap);
}
static int dwc3_omap_suspend(struct device *dev)
Patches currently in stable-queue which might be from rogerq@xxxxxx are
queue-3.17/revert-usb-dwc3-dwc3-omap-disable-enable-only-wrapper-interrupts-in-prepare-complete.patch
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