From: Felipe Balbi Date: Mon, 15 Sep 2014 14:03:24 +0000 (-0500) Subject: usb: musb: dsps: kill OTG timer on suspend X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=468bcc2a2ca071f652009d2d20d97f2437630cae;p=deliverable%2Flinux.git 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: # v3.14+ Fixes 869c597 (usb: musb: dsps: add support for suspend and resume) Tested-by: Dave Gerlach Signed-off-by: Felipe Balbi --- 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; }