diff mbox series

[v2] usb/usbip: Fix v_recv_cmd_submit() to use PIPE_BULK define

Message ID 20221110194738.38514-1-skhan@linuxfoundation.org (mailing list archive)
State Accepted
Commit dd65a243a915ca319ed5fee9161a168c836fa2f2
Headers show
Series [v2] usb/usbip: Fix v_recv_cmd_submit() to use PIPE_BULK define | expand

Commit Message

Shuah Khan Nov. 10, 2022, 7:47 p.m. UTC
Fix v_recv_cmd_submit() to use PIPE_BULK define instead of hard coded
values. This also fixes the following signed integer overflow error
reported by cppcheck. This is not an issue since pipe is unsigned int.
However, this change improves the code to use proper define.

drivers/usb/usbip/vudc_rx.c:152:26: error: Signed integer overflow for expression '3<<30'. [integerOverflow]
 urb_p->urb->pipe &= ~(3 << 30);

In addition, add a build time check for PIPE_BULK != 3 as the code path
depends on PIPE_BULK = 3.

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
v1 -> v2:
- Use BUILD_BUG_ON_MSG

 drivers/usb/usbip/vudc_rx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/usbip/vudc_rx.c b/drivers/usb/usbip/vudc_rx.c
index d4a2f30a7580..51bb70837b90 100644
--- a/drivers/usb/usbip/vudc_rx.c
+++ b/drivers/usb/usbip/vudc_rx.c
@@ -149,7 +149,9 @@  static int v_recv_cmd_submit(struct vudc *udc,
 	urb_p->urb->status = -EINPROGRESS;
 
 	/* FIXME: more pipe setup to please usbip_common */
-	urb_p->urb->pipe &= ~(3 << 30);
+	BUILD_BUG_ON_MSG(PIPE_BULK != 3, "PIPE_* doesn't range from 0 to 3");
+
+	urb_p->urb->pipe &= ~(PIPE_BULK << 30);
 	switch (urb_p->ep->type) {
 	case USB_ENDPOINT_XFER_BULK:
 		urb_p->urb->pipe |= (PIPE_BULK << 30);