linux-kernel - Re: [PATCH 2/2] HID: logitech-dj: break out testing of validity of dj

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Date:	Mon, 25 Aug 2014 02:51:07 -0500 (CDT)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] HID: logitech-dj: break out testing of validity of
 dj_device

On Fri, 22 Aug 2014, Benjamin Tissoires wrote:

> We can do once the test of the validity of the dj_device, which removes
> some duplicated code in various functions.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>

I will queue this cleanup for next merge window. Thanks.

> ---
>  drivers/hid/hid-logitech-dj.c | 35 +++++++++++------------------------
>  1 file changed, 11 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
> index 9bf8637..71f5692 100644
> --- a/drivers/hid/hid-logitech-dj.c
> +++ b/drivers/hid/hid-logitech-dj.c
> @@ -385,18 +385,6 @@ static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
>  
>  	djdev = djrcv_dev->paired_dj_devices[dj_report->device_index];
>  
> -	if (!djdev) {
> -		dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
> -			" is NULL, index %d\n", dj_report->device_index);
> -		kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
> -
> -		if (schedule_work(&djrcv_dev->work) == 0) {
> -			dbg_hid("%s: did not schedule the work item, was already "
> -			"queued\n", __func__);
> -		}
> -		return;
> -	}
> -
>  	memset(reportbuffer, 0, sizeof(reportbuffer));
>  
>  	for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) {
> @@ -421,18 +409,6 @@ static void logi_dj_recv_forward_report(struct dj_receiver_dev *djrcv_dev,
>  
>  	dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index];
>  
> -	if (dj_device == NULL) {
> -		dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
> -			" is NULL, index %d\n", dj_report->device_index);
> -		kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
> -
> -		if (schedule_work(&djrcv_dev->work) == 0) {
> -			dbg_hid("%s: did not schedule the work item, was already "
> -			"queued\n", __func__);
> -		}
> -		return;
> -	}
> -
>  	if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) ||
>  	    (hid_reportid_size_map[dj_report->report_type] == 0)) {
>  		dbg_hid("invalid report type:%x\n", dj_report->report_type);
> @@ -701,8 +677,17 @@ static int logi_dj_raw_event(struct hid_device *hdev,
>  	}
>  
>  	spin_lock_irqsave(&djrcv_dev->lock, flags);
> +
> +	if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) {
> +		/* received an event for an unknown device, bail out */
> +		logi_dj_recv_queue_notification(djrcv_dev, dj_report);
> +		goto out;
> +	}
> +
>  	switch (dj_report->report_type) {
>  	case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
> +		/* pairing notifications are handled above the switch */
> +		break;
>  	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
>  		logi_dj_recv_queue_notification(djrcv_dev, dj_report);
>  		break;
> @@ -715,6 +700,8 @@ static int logi_dj_raw_event(struct hid_device *hdev,
>  	default:
>  		logi_dj_recv_forward_report(djrcv_dev, dj_report);
>  	}
> +
> +out:
>  	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
>  
>  	return true;
> -- 
> 2.1.0
> 

-- 
Jiri Kosina
SUSE Labs
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