[PATCH 4.16 23/43] usb: gadget: udc: renesas_usb3: should fail if devm_phy_get() returns error

Greg Kroah-Hartman
2018-06-14T14:08:35Z

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

commit 0259068f63f23a665ded28647f2f9cdb6b20dc72 upstream.

This patch fixes an issue that this driver ignores errors other than
the non-existence of the device, f.e. a memory allocation failure
in devm_phy_get(). So, this patch replaces devm_phy_get() with
devm_phy_optional_get().

Reported-by: Simon Horman <horms+renesas@verge.net.au>
Fixes: 279d4bc64060 ("usb: gadget: udc: renesas_usb3: add support for generic phy")
Cc: <stable@vger.kernel.org> # v4.15+
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/gadget/udc/renesas_usb3.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -2636,9 +2636,11 @@ static int renesas_usb3_probe(struct pla
* This is optional. So, if this driver cannot get a phy,
* this driver will not handle a phy anymore.
*/
- usb3->phy = devm_phy_get(&pdev->dev, "usb");
- if (IS_ERR(usb3->phy))
- usb3->phy = NULL;
+ usb3->phy = devm_phy_optional_get(&pdev->dev, "usb");
+ if (IS_ERR(usb3->phy)) {
+ ret = PTR_ERR(usb3->phy);
+ goto err_add_udc;
+ }

pm_runtime_enable(&pdev->dev);
ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);