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HID: magicmouse: ignore 'ivalid report id' while switching modes

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The device reponds with 'invalid report id' when feature report switching it
into multitouch mode is sent to it.

This has been silently ignored before 0825411ade ("HID: bt: Wait for ACK
on Sent Reports"), but since this commit, it propagates -EIO from the _raw
callback .

So let the driver ignore -EIO as response to 0xd7,0x01 report, as that's
how the device reacts in normal mode.

Sad, but following reality.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=35022

Tested-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jiri Kosina 2011-05-19 17:58:07 +02:00
parent 966922f26c
commit 23746a66d7
1 changed files with 9 additions and 1 deletions
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10
drivers/hid/hid-magicmouse.c
View file

@ -499,9 +499,17 @@ static int magicmouse_probe(struct hid_device *hdev,
}
report->size = 6;
/*
* The device reponds with 'invalid report id' when feature
* report switching it into multitouch mode is sent to it.
*
* This results in -EIO from the _raw low-level transport callback,
* but there seems to be no other way of switching the mode.
* Thus the super-ugly hacky success check below.
*/
ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature),
HID_FEATURE_REPORT);
if (ret != sizeof(feature)) {
if (ret != -EIO) {
hid_err(hdev, "unable to request touch data (%d)\n", ret);
goto err_stop_hw;
}