Re: [PATCH] drivers:mfd:omap-usb-host.c: Fix improper mask use.

[Roger Quadros <rogerq@ti.com>]

Hi Michael,

On 07/29/2014 02:01 AM, Michael Welling wrote:
> single-ulpi-bypass is a flag used for older OMAP3 silicon.
> 
> The flag when set, can excite code that improperly uses the
> OMAP_UHH_HOSTCONFIG_UPLI_BYPASS define to clear the corresponding bit.
> Instead it clears all of the other bits disabling all of the ports in
> the process.
> 
> Signed-off-by: Michael Welling <mwelling@emacinc.com>
> ---
>  drivers/mfd/omap-usb-host.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
> index b48d80c..33a9234 100644
> --- a/drivers/mfd/omap-usb-host.c
> +++ b/drivers/mfd/omap-usb-host.c
> @@ -445,7 +445,7 @@ static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap,
>  
>  		for (i = 0; i < omap->nports; i++) {
>  			if (is_ehci_phy_mode(pdata->port_mode[i])) {
> -				reg &= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
> +				reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
>  				break;
>  			}
>  		}
> 

Acked-by: Roger Quadros <rogerq@ti.com>

Good catch!

It seems the regression was introduced by commit c4df00aed9e2 in v3.9.
Could you please cc this patch to stable@vger.kernel.org

cheers,
-roger