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@vger.kernel.org> # v3.14+
Fixes 869c597 (usb: musb: dsps: add support for suspend and resume)
Tested-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index c791ba5..154bcf1 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -870,6 +870,7 @@
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 @@
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;
}