From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 16 Mar 2018 16:32:58 +0200
Subject: [PATCH] usb: xhci: Clean up error code in
xhci_dbc_tty_register_device()
Git-commit: 29f653393e740b159933b03de25f929bec7b31b7
Patch-mainline: v4.17-rc1
References: FATE#325197
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 <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/usb/host/xhci-dbgtty.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
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)
--
2.16.4