i2c: tiny-usb: disable zero-length read messages

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commit cbdb25ccf7 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: e8c76eed2e ("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>

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Wolfram Sang 2025-05-22 08:43:49 +02:00 • committed by Greg Kroah-Hartman

parent 61a9ad7b69

commit a4dae6cbd2

1 changed files with 6 additions and 0 deletions

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drivers/i2c/busses/i2c-tiny-usb.c

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