From: Dan Carpenter Date: Fri, 16 Mar 2018 14:32:58 +0000 (+0200) Subject: usb: xhci: Clean up error code in xhci_dbc_tty_register_device() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=29f653393e740b159933b03de25f929bec7b31b7;p=openwrt%2Fstaging%2Fblogic.git usb: xhci: Clean up error code in xhci_dbc_tty_register_device() tty_port_register_device() returns error pointers on error, never NULL. The IS_ERR_OR_NULL() function returns either 1 or 0 so it means we return 1 on error instead of a proper error code. The caller only checks for zero vs non-zero so this doesn't affect runtime. Signed-off-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c index 8d47b6fbf973..6f534b6decef 100644 --- a/drivers/usb/host/xhci-dbgtty.c +++ b/drivers/usb/host/xhci-dbgtty.c @@ -443,9 +443,10 @@ int xhci_dbc_tty_register_device(struct xhci_hcd *xhci) xhci_dbc_tty_init_port(xhci, port); tty_dev = tty_port_register_device(&port->port, dbc_tty_driver, 0, NULL); - ret = IS_ERR_OR_NULL(tty_dev); - if (ret) + if (IS_ERR(tty_dev)) { + ret = PTR_ERR(tty_dev); goto register_fail; + } ret = kfifo_alloc(&port->write_fifo, DBC_WRITE_BUF_SIZE, GFP_KERNEL); if (ret)