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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>
This commit is contained in:
Felipe Balbi 2014-09-15 09:03:24 -05:00
parent 6dd5b021bd
commit 468bcc2a2c
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/musb/musb_dsps.c
View File

@ -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;
}