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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: b6bb72cf0d ("usb: xhci-mtk: add optional mcu and dma bus clocks")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
kbuild test robot 2017-10-25 00:33:18 +08:00 committed by Greg Kroah-Hartman
parent 2d5afd51fe
commit c929d84735
1 changed files with 1 additions and 4 deletions
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5
drivers/usb/host/xhci-mtk.c
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@ -253,10 +253,7 @@ static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
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)