]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
i2c: tiny-usb: disable zero-length read messages
authorWolfram Sang <wsa+renesas@sang-engineering.com>
Thu, 22 May 2025 06:43:49 +0000 (08:43 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 6 Jul 2025 08:57:59 +0000 (10:57 +0200)
commitce6bc748ba6362ba2b2892a9b340b1190098602d
tree978bea7fd2c546b2097b8a636aa978b4b7d029d1
parenta12237865b48a73183df252029ff5065d73d305e
i2c: tiny-usb: disable zero-length read messages

commit cbdb25ccf7566eee0c2b945e35cb98baf9ed0aa6 upstream.

This driver passes the length of an i2c_msg directly to
usb_control_msg(). If the message is now a read and of length 0, it
violates the USB protocol and a warning will be printed. Enable the
I2C_AQ_NO_ZERO_LEN_READ quirk for this adapter thus forbidding 0-length
read messages altogether.

Fixes: e8c76eed2ecd ("i2c: New i2c-tiny-usb bus driver")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: <stable@vger.kernel.org> # v2.6.22+
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20250522064349.3823-2-wsa+renesas@sang-engineering.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/i2c/busses/i2c-tiny-usb.c