Use the shorter variants as suggested by checkpatch.pl:

  CHECK: Comparison to NULL could be written "!c"
  CHECK: Comparison to NULL could be written "!vhcis"

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
 drivers/usb/usbip/vhci_hcd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index d3933979689f8cd141b3554e902c1e7b9fc6c694..e989be33ada00d5073f5753b72bb71d349c67b83 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -1131,7 +1131,7 @@ static int hcd_name_to_id(const char *name)
 	int ret;
 
 	c = strchr(name, '.');
-	if (c == NULL)
+	if (!c)
 		return 0;
 
 	ret = kstrtol(c + 1, 10, &val);
@@ -1521,7 +1521,7 @@ static int __init vhci_hcd_init(void)
 		vhci_num_controllers = 1;
 
 	vhcis = kcalloc(vhci_num_controllers, sizeof(struct vhci), GFP_KERNEL);
-	if (vhcis == NULL)
+	if (!vhcis)
 		return -ENOMEM;
 
 	ret = platform_driver_register(&vhci_driver);

-- 
2.51.0