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Date: Fri, 31 Aug 2018 17:56:33 +0800 From: Chunfeng Yun <chunfeng.yun@...iatek.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Felipe Balbi <felipe.balbi@...ux.intel.com> CC: Martin Blumenstingl <martin.blumenstingl@...glemail.com>, Matthias Brugger <matthias.bgg@...il.com>, Johan Hovold <johan@...nel.org>, Chunfeng Yun <chunfeng.yun@...iatek.com>, <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org> Subject: [PATCH v4] usb: core: phy: clean up return value check about devm_of_phy_get_by_index() Use IS_ERR() instead of IS_ERR_OR_NULL() because devm_of_phy_get_by_index() never return NULL value; But still need ignore the error of -ENODEV, for more information, please refer to: [0] https://lkml.org/lkml/2018/4/19/88 [1] https://patchwork.kernel.org/patch/10160181/ Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com> --- V4: modify the patch subject suggested by Johan V3: abandon the ternary operator suggested by Johan V2: keep the -ENODEV check --- drivers/usb/core/phy.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c index 9879767..38b2c77 100644 --- a/drivers/usb/core/phy.c +++ b/drivers/usb/core/phy.c @@ -23,10 +23,11 @@ static int usb_phy_roothub_add_phy(struct device *dev, int index, struct list_head *list) { struct usb_phy_roothub *roothub_entry; - struct phy *phy = devm_of_phy_get_by_index(dev, dev->of_node, index); + struct phy *phy; - if (IS_ERR_OR_NULL(phy)) { - if (!phy || PTR_ERR(phy) == -ENODEV) + phy = devm_of_phy_get_by_index(dev, dev->of_node, index); + if (IS_ERR(phy)) { + if (PTR_ERR(phy) == -ENODEV) return 0; else return PTR_ERR(phy); -- 1.9.1
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