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| author |   Dan Elkouby <streetwalkermc@gmail.com> | 2019-09-06 14:06:44 +0300 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2019-09-06 15:55:40 +0200 |
| commit | 8bb3537095f107ed55ad51f6241165b397aaafac (patch) | |
| tree | 4d1ed7c09cb08e75f92b4efc2f83e6c75bf15acb /net | |
| parent | Bluetooth: btusb: Use cmd_timeout to reset Realtek device (diff) | |
| download | linux-dev-8bb3537095f107ed55ad51f6241165b397aaafac.tar.xz linux-dev-8bb3537095f107ed55ad51f6241165b397aaafac.zip | |
Bluetooth: hidp: Fix assumptions on the return value of hidp_send_message
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: 48d9cc9d85dd ("Bluetooth: hidp: Let hidp_send_message return number of queued bytes")
Signed-off-by: Dan Elkouby <streetwalkermc@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/hidp/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c index 8d889969ae7e..bef84b95e2c4 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -267,7 +267,7 @@ static int hidp_get_raw_report(struct hid_device *hid, set_bit(HIDP_WAITING_FOR_RETURN, &session->flags); data[0] = report_number; ret = hidp_send_ctrl_message(session, report_type, data, 1); - if (ret) + if (ret < 0) goto err; /* Wait for the return of the report. The returned report @@ -343,7 +343,7 @@ static int hidp_set_raw_report(struct hid_device *hid, unsigned char reportnum, data[0] = reportnum; set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); ret = hidp_send_ctrl_message(session, report_type, data, count); - if (ret) + if (ret < 0) goto err; /* Wait for the ACK from the device. */ |