> Extend mt76u_bulk_msg() such it can be used for synchronous bulk reads.
>
> Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
> ---
Hi Stanislaw,
testing this series I got the following error:
[ 3.448267] mt76x0u 1-1:1.0: ASIC revision: 76100002 MAC revision: 76502000
[ 3.451220] INFO: trying to register non-static key.
[ 3.452055] the code is fine but needs lockdep annotation.
[ 3.452945] turning off the locking correctness validator.
[ 3.453590] CPU: 0 PID: 18 Comm: kworker/0:1 Not tainted 5.0.0-rc4+ #2963
[ 3.454390] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
?-20180724_192412-buildhw-07.phx2.fedoraproject.org-1.fc29 04/01/2014
[ 3.455973] Workqueue: usb_hub_wq hub_event
[ 3.456642] Call Trace:
[ 3.456989] register_lock_class+0x4fd/0x510
[ 3.457619] ? mark_held_locks+0x4f/0x80
[ 3.458172] __lock_acquire+0x6c/0x1580
[ 3.458675] ? __mt76u_vendor_request+0xc0/0x110
[ 3.459302] ? find_held_lock+0x2d/0x90
[ 3.459802] lock_acquire+0x88/0x120
[ 3.460283] ? mt76u_queues_deinit+0x4e/0x120
[ 3.460875] _raw_spin_lock_bh+0x38/0x80
[ 3.461412] ? mt76u_queues_deinit+0x4e/0x120
[ 3.461999] mt76u_queues_deinit+0x4e/0x120
[ 3.462565] mt76x0u_probe+0x1e6/0x220
[ 3.463070] usb_probe_interface+0xa7/0x1d0
[ 3.463639] ? __driver_attach+0xd0/0xd0
[ 3.464167] really_probe+0xda/0x250
[ 3.464754] ? __driver_attach+0xd0/0xd0
[ 3.465285] bus_for_each_drv+0x66/0x90
[ 3.465801] __device_attach+0xa8/0xe0
[ 3.466309] bus_probe_device+0x9f/0xb0
[ 3.466880] device_add+0x3a2/0x5f0
[ 3.467338] usb_set_configuration+0x471/0x7d0
[ 3.467942] ? __driver_attach+0xd0/0xd0
[ 3.468454] generic_probe+0x48/0x70
[ 3.468929] really_probe+0xda/0x250
[ 3.469411] ? __driver_attach+0xd0/0xd0
[ 3.469931] bus_for_each_drv+0x66/0x90
[ 3.470433] __device_attach+0xa8/0xe0
[ 3.470920] bus_probe_device+0x9f/0xb0
[ 3.471420] device_add+0x3a2/0x5f0
[ 3.471875] usb_new_device+0x193/0x320
[ 3.472382] hub_event+0xbf7/0x1160
[ 3.472840] process_one_work+0x2a4/0x580
[ 3.473367] ? process_one_work+0x580/0x580
[ 3.473912] worker_thread+0x2d/0x3d0
[ 3.474390] ? process_one_work+0x580/0x580
[ 3.474940] kthread+0x115/0x130
[ 3.475392] ? kthread_create_on_node+0x40/0x40
[ 3.475968] ret_from_fork+0x3a/0x50
[ 3.476492] mt76x0u: probe of 1-1:1.0 failed with error -12
Regards,
Lorenzo
> drivers/net/wireless/mediatek/mt76/mt76.h | 13 ++++++++++---
> drivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c | 4 ++--
> 2 files changed, 12 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
> index f55dc621e060..45e44bcaa523 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt76.h
> @@ -729,7 +729,8 @@ static inline u8 q2ep(u8 qid)
> }
>
> static inline int
> -mt76u_bulk_msg(struct mt76_dev *dev, void *data, int len, int timeout)
> +mt76u_bulk_msg(struct mt76_dev *dev, void *data, int len, int *actual_len,
> + int timeout)
> {
> struct usb_interface *intf = to_usb_interface(dev->dev);
> struct usb_device *udev = interface_to_usbdev(intf);
> @@ -737,8 +738,14 @@ mt76u_bulk_msg(struct mt76_dev *dev, void *data, int len, int timeout)
> unsigned int pipe;
> int sent;
>
> - pipe = usb_sndbulkpipe(udev, usb->out_ep[MT_EP_OUT_INBAND_CMD]);
> - return usb_bulk_msg(udev, pipe, data, len, &sent, timeout);
> + if (actual_len) {
> + pipe = usb_rcvbulkpipe(udev, usb->in_ep[MT_EP_IN_CMD_RESP]);
> + } else {
> + actual_len = &sent;
> + pipe = usb_sndbulkpipe(udev, usb->out_ep[MT_EP_OUT_INBAND_CMD]);
> + }
> +
> + return usb_bulk_msg(udev, pipe, data, len, actual_len, timeout);
> }
>
> int mt76u_vendor_request(struct mt76_dev *dev, u8 req,
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c
> index e469e383cb88..f497c8e4332a 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c
> @@ -126,7 +126,7 @@ __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
> if (ret)
> return ret;
>
> - ret = mt76u_bulk_msg(dev, skb->data, skb->len, 500);
> + ret = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 500);
> if (ret)
> return ret;
>
> @@ -271,7 +271,7 @@ __mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, u8 *data,
>
> data_len = MT_CMD_HDR_LEN + len + sizeof(info);
>
> - err = mt76u_bulk_msg(&dev->mt76, data, data_len, 1000);
> + err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000);
> if (err) {
> dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err);
> return err;
> --
> 2.7.5
>
