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The direction of the pipe argument must match the request-type direction
bit or control requests may fail depending on the host-controller-driver
implementation.
Control transfers without a data stage are treated as OUT requests by
the USB stack and should be using usb_sndctrlpipe(). Failing to do so
will now trigger a warning.
Fix the OSIFI2C_SET_BIT_RATE and OSIFI2C_STOP requests which erroneously
used the osif_usb_read() helper and set the IN direction bit.
Reported-by: syzbot+9d7dadd15b8819d73f41@syzkaller.appspotmail.com
Fixes: 83e53a8f120f ("i2c: Add bus driver for for OSIF USB i2c device.")
Cc: stable@vger.kernel.org # 3.14
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
4ca070ef0d