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@xxxxxxxxxx>
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)
--
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