linux-kernel - [PATCH] usb: xhci-mtk: fix ptr

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Date:   Wed, 25 Oct 2017 00:33:18 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc:     kbuild-all@...org, linux-usb@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: xhci-mtk: fix ptr_ret.cocci warnings

drivers/usb/host/xhci-mtk.c:256:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

Fixes: b6bb72cf0df1 ("usb: xhci-mtk: add optional mcu and dma bus clocks")
CC: Chunfeng Yun <chunfeng.yun@...iatek.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---

 xhci-mtk.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -253,10 +253,7 @@ static int xhci_mtk_clks_get(struct xhci
 		return PTR_ERR(mtk->mcu_clk);
 
 	mtk->dma_clk = optional_clk_get(dev, "dma_ck");
-	if (IS_ERR(mtk->dma_clk))
-		return PTR_ERR(mtk->dma_clk);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(mtk->dma_clk);
 }
 
 static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)