This is a note to let you know that I've just added the patch titled
usb: musb: dsps: kill OTG timer on suspend
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>From 468bcc2a2ca071f652009d2d20d97f2437630cae Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@xxxxxx>
Date: Mon, 15 Sep 2014 09:03:24 -0500
Subject: usb: musb: dsps: kill OTG timer on suspend
if we don't make sure to kill the timer, it could
expire after we have already gated our clocks.
That will trigger a Data Abort exception because
we would try to access register while clock is gated.
Fix that bug.
Cc: <stable@xxxxxxxxxxxxxxx> # v3.14+
Fixes 869c597 (usb: musb: dsps: add support for suspend and resume)
Tested-by: Dave Gerlach <d-gerlach@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/musb/musb_dsps.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index c791ba5da91a..154bcf1b5dfa 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -870,6 +870,7 @@ static int dsps_suspend(struct device *dev)
struct musb *musb = platform_get_drvdata(glue->musb);
void __iomem *mbase = musb->ctrl_base;
+ del_timer_sync(&glue->timer);
glue->context.control = dsps_readl(mbase, wrp->control);
glue->context.epintr = dsps_readl(mbase, wrp->epintr_set);
glue->context.coreintr = dsps_readl(mbase, wrp->coreintr_set);
@@ -895,6 +896,7 @@ static int dsps_resume(struct device *dev)
dsps_writel(mbase, wrp->mode, glue->context.mode);
dsps_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
dsps_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
+ setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
return 0;
}
--
2.1.0
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