On Fri, Sep 06, 2019 at 12:41:57PM +0300, Dan Elkouby wrote:

Commit 48d9cc9d85dd ("Bluetooth: hidp: Let hidp_send_message return
number of queued bytes") changed hidp_send_message to return non-zero
values on success, which some other bits did not expect. This caused
spurious errors to be propagated through the stack, breaking some (all?)
drivers, such as hid-sony for the Dualshock 4 in Bluetooth mode.

Signed-off-by: Dan Elkouby <redacted>

I think we also need to update update ms_ff_worker() which assumes that
hid_hw_output_report() returns zero on success.  Please use the Fixes
tag for this since a lot of scripts rely on it to decide what to
backport.

Fixes: 48d9cc9d85dd ("Bluetooth: hidp: Let hidp_send_message return number of queued bytes")

Otherwise, it looks good.  Thanks for catching this.

regards,
dan carpenter