From: Zhang Qilong Date: Fri, 6 Nov 2020 12:22:21 +0000 (+0800) Subject: xhci: hisilicon: fix refercence leak in xhci_histb_probe X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=76255470ffa2795a44032e8b3c1ced11d81aa2db;p=linux.git xhci: hisilicon: fix refercence leak in xhci_histb_probe pm_runtime_get_sync() will increment pm usage at first and it will resume the device later. We should decrease the usage count whetever it succeeded or failed(maybe runtime of the device has error, or device is in inaccessible state, or other error state). If we do not call put operation to decrease the reference, it will result in reference leak in xhci_histb_probe. Moreover, this device cannot enter the idle state and always stay busy or other non-idle state later. So we fixed it by jumping to error handling branch. Fixes: c508f41da0788 ("xhci: hisilicon: support HiSilicon STB xHCI host controller") Signed-off-by: Zhang Qilong Link: https://lore.kernel.org/r/20201106122221.2304528-1-zhangqilong3@huawei.com Cc: stable Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/xhci-histb.c b/drivers/usb/host/xhci-histb.c index 5546e7e013a88..08369857686e7 100644 --- a/drivers/usb/host/xhci-histb.c +++ b/drivers/usb/host/xhci-histb.c @@ -240,7 +240,7 @@ static int xhci_histb_probe(struct platform_device *pdev) /* Initialize dma_mask and coherent_dma_mask to 32-bits */ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); if (ret) - return ret; + goto disable_pm; hcd = usb_create_hcd(driver, dev, dev_name(dev)); if (!hcd) {