diff options
| author | Jeremy Kerr <jk@codeconstruct.com.au> | 2026-07-24 13:15:23 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-07-30 16:54:58 -0700 |
| commit | 05b1a3a5eeaa64a5d412688e682a3b13acd99e8b (patch) | |
| tree | adb777bdf16d8c08b18f6dd1dab9056d44ecf9df /include/linux | |
| parent | 2f2e974f8fbe8a19311842afaf66394f4caa0ae4 (diff) | |
net: mctp: usb: Use packet-length max for maximum packet-size check
The max packet size is smaller than the max transfer size, as we only
have a u8 length field in the transport header.
Add a define for the maximum representable length, and use that for our
check. Use this for the MTU maximum calculation too.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://patch.msgid.link/20260724-dev-mctp-usb-1-1-v5-2-e66bbba0dbdc@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/usb/mctp-usb.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/usb/mctp-usb.h b/include/linux/usb/mctp-usb.h index 47e2e3931d63..2bece8afd1c7 100644 --- a/include/linux/usb/mctp-usb.h +++ b/include/linux/usb/mctp-usb.h @@ -25,7 +25,8 @@ struct mctp_usb_hdr { #define MCTP_USB_1_0_XFER_SIZE 512 #define MCTP_USB_BTU 68 #define MCTP_USB_MTU_MIN MCTP_USB_BTU -#define MCTP_USB_1_0_MTU_MAX (U8_MAX - sizeof(struct mctp_usb_hdr)) +#define MCTP_USB_1_0_PKTLEN_MAX U8_MAX +#define MCTP_USB_1_0_MTU_MAX (MCTP_USB_1_0_PKTLEN_MAX - sizeof(struct mctp_usb_hdr)) #define MCTP_USB_DMTF_ID 0x1ab4 #endif /* __LINUX_USB_MCTP_USB_H */ |