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Bluetooth: hidp: Fix assumptions on the return value of hidp_send_message

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hidp_send_message was changed 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 drivers, such as hid-sony
for the Dualshock 4 in Bluetooth mode.

As pointed out by Dan Carpenter, hid-microsoft directly relied on that
assumption as well.

Fixes: 48d9cc9d85 ("Bluetooth: hidp: Let hidp_send_message return number of queued bytes")

Signed-off-by: Dan Elkouby <[email protected]>
Reviewed-by: Dan Carpenter <[email protected]>
Reviewed-by: Jiri Kosina <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
This commit is contained in:
Dan Elkouby 2019-09-06 14:06:44 +03:00 • committed by Marcel Holtmann
commit 8bb3537095
2 changed files with 3 additions and 3 deletions
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2
drivers/hid/hid-microsoft.c
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@ -303,7 +303,7 @@ static void ms_ff_worker(struct work_struct *work)
r->magnitude[MAGNITUDE_WEAK] = ms->weak; /* right actuator */
ret = hid_hw_output_report(hdev, (__u8 *)r, sizeof(*r));
if (ret)
if (ret < 0)
hid_warn(hdev, "failed to send FF report\n");
}