This is a note to let you know that I've just added the patch titled
usb: musb: ignore spurious SESSREQ interrupts
to my gregkh-2.6 tree which can be found in directory form at:
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
and in git form at:
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/patches.git
The filename of this patch is:
usb-musb-ignore-spurious-sessreq-interrupts.patch
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
If this patch meets the merge guidelines for a bugfix, it should be
merged into Linus's tree before the next major kernel release.
If not, it will be merged into Linus's tree during the next merge window.
Either way, you will probably be copied on the patch when it gets sent
to Linus for merging so that others can see what is happening in kernel
development.
If you have any questions about this process, please let me know.
>From balbi@xxxxxx Tue Oct 5 13:30:50 2010
From: Felipe Balbi <balbi@xxxxxx>
To: Greg KH <greg@xxxxxxxxx>
Cc: Linux USB Mailing List <linux-usb@xxxxxxxxxxxxxxx>,
Heikki Krogerus <ext-heikki.krogerus@xxxxxxxxx>
Subject: usb: musb: ignore spurious SESSREQ interrupts
Date: Fri, 24 Sep 2010 13:44:13 +0300
Message-Id: <1285325055-1247-13-git-send-email-balbi@xxxxxx>
From: Heikki Krogerus <ext-heikki.krogerus@xxxxxxxxx>
This will ignore any SESSREQ interrupt if musb is B state.
Charger detection may cause spurious SESSREQ interrupts.
Signed-off-by: Heikki Krogerus <ext-heikki.krogerus@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/musb/musb_core.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -550,6 +550,11 @@ static irqreturn_t musb_stage0_irq(struc
if (int_usb & MUSB_INTR_SESSREQ) {
void __iomem *mbase = musb->mregs;
+ if (devctl & MUSB_DEVCTL_BDEVICE) {
+ DBG(3, "SessReq while on B state\n");
+ return IRQ_HANDLED;
+ }
+
DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb));
/* IRQ arrives from ID pin sense or (later, if VBUS power
--
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