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Message-ID: <CAN+gG=FFnK7NwiGN1oLsBA6euyDHOxrY6s7-yRo553jcLbzuYQ@mail.gmail.com>
Date: Wed, 9 Apr 2014 16:40:37 -0400
From: Benjamin Tissoires <benjamin.tissoires@...il.com>
To: Tolga Cakir <tolga@...el.net>
Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>,
Derya <derya.kiran@...oo.de>, Jiri Kosina <jkosina@...e.cz>,
Reyad Attiyat <reyad.attiyat@...il.com>,
linux-input <linux-input@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] HID: microsoft: moving quirks to struct
On Fri, Apr 4, 2014 at 1:06 PM, Tolga Cakir <tolga@...el.net> wrote:
> This will give us the opportunity to easily implement extra features
> for new devices.
>
> Signed-off-by: Tolga Cakir <tolga@...el.net>
> ---
> drivers/hid/hid-microsoft.c | 44 ++++++++++++++++++++++++++++----------------
> 1 file changed, 28 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
> index 6fd5817..0a61403 100644
> --- a/drivers/hid/hid-microsoft.c
> +++ b/drivers/hid/hid-microsoft.c
> @@ -30,23 +30,28 @@
> #define MS_DUPLICATE_USAGES 0x20
> #define MS_RDESC_3K 0x40
>
> +struct ms_data {
> + unsigned long quirks;
> + void *extra;
I do not like having a void * pointer in this kind of struct,
especially when it is not used in the current patch.
Please remove it in v2
> +};
> +
> static __u8 *ms_report_fixup(struct hid_device *hdev, __u8 *rdesc,
> unsigned int *rsize)
> {
> - unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
> + struct ms_data *sc = hid_get_drvdata(hdev);
>
> /*
> * Microsoft Wireless Desktop Receiver (Model 1028) has
> * 'Usage Min/Max' where it ought to have 'Physical Min/Max'
> */
> - if ((quirks & MS_RDESC) && *rsize == 571 && rdesc[557] == 0x19 &&
> + if ((sc->quirks & MS_RDESC) && *rsize == 571 && rdesc[557] == 0x19 &&
> rdesc[559] == 0x29) {
> hid_info(hdev, "fixing up Microsoft Wireless Receiver Model 1028 report descriptor\n");
> rdesc[557] = 0x35;
> rdesc[559] = 0x45;
> }
> /* the same as above (s/usage/physical/) */
> - if ((quirks & MS_RDESC_3K) && *rsize == 106 && rdesc[94] == 0x19 &&
> + if ((sc->quirks & MS_RDESC_3K) && *rsize == 106 && rdesc[94] == 0x19 &&
> rdesc[95] == 0x00 && rdesc[96] == 0x29 &&
> rdesc[97] == 0xff) {
> rdesc[94] = 0x35;
> @@ -142,15 +147,15 @@ static int ms_input_mapping(struct hid_device *hdev, struct hid_input *hi,
> struct hid_field *field, struct hid_usage *usage,
> unsigned long **bit, int *max)
> {
> - unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
> + struct ms_data *sc = hid_get_drvdata(hdev);
>
> - if (quirks & MS_ERGONOMY) {
> + if (sc->quirks & MS_ERGONOMY) {
> int ret = ms_ergonomy_kb_quirk(hi, usage, bit, max);
> if (ret)
> return ret;
> }
>
> - if ((quirks & MS_PRESENTER) &&
> + if ((sc->quirks & MS_PRESENTER) &&
> ms_presenter_8k_quirk(hi, usage, bit, max))
> return 1;
>
> @@ -161,9 +166,9 @@ static int ms_input_mapped(struct hid_device *hdev, struct hid_input *hi,
> struct hid_field *field, struct hid_usage *usage,
> unsigned long **bit, int *max)
> {
> - unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
> + struct ms_data *sc = hid_get_drvdata(hdev);
>
> - if (quirks & MS_DUPLICATE_USAGES)
> + if (sc->quirks & MS_DUPLICATE_USAGES)
> clear_bit(usage->code, *bit);
>
> return 0;
> @@ -172,7 +177,7 @@ static int ms_input_mapped(struct hid_device *hdev, struct hid_input *hi,
> static int ms_event(struct hid_device *hdev, struct hid_field *field,
> struct hid_usage *usage, __s32 value)
> {
> - unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
> + struct ms_data *sc = hid_get_drvdata(hdev);
> struct input_dev *input;
>
> if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
> @@ -182,7 +187,7 @@ static int ms_event(struct hid_device *hdev, struct hid_field *field,
> input = field->hidinput->input;
>
> /* Handling MS keyboards special buttons */
> - if (quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff00)) {
> + if (sc->quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff00)) {
> /* Special keypad keys */
> input_report_key(input, KEY_KPEQUAL, value & 0x01);
> input_report_key(input, KEY_KPLEFTPAREN, value & 0x02);
> @@ -190,7 +195,7 @@ static int ms_event(struct hid_device *hdev, struct hid_field *field,
> return 1;
> }
>
> - if (quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff01)) {
> + if (sc->quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff01)) {
> /* Scroll wheel */
> int step = ((value & 0x60) >> 5) + 1;
>
> @@ -205,7 +210,7 @@ static int ms_event(struct hid_device *hdev, struct hid_field *field,
> return 1;
> }
>
> - if (quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff05)) {
> + if (sc->quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff05)) {
> static unsigned int last_key = 0;
> unsigned int key = 0;
> switch (value) {
> @@ -229,12 +234,19 @@ static int ms_event(struct hid_device *hdev, struct hid_field *field,
>
> static int ms_probe(struct hid_device *hdev, const struct hid_device_id *id)
> {
> - unsigned long quirks = id->driver_data;
> + struct ms_data *sc;
> int ret;
>
> - hid_set_drvdata(hdev, (void *)quirks);
> + sc = devm_kzalloc(&hdev->dev, sizeof(struct ms_data), GFP_KERNEL);
> + if (!sc) {
> + hid_err(hdev, "can't alloc microsoft descriptor\n");
How about: "Can not allocate microsoft data"?
I have no idea where this "descriptor" comes from.
Besides these two nitpicks, the rest of the patch is:
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cheers,
Benjamin
> + return -ENOMEM;
> + }
> +
> + sc->quirks = id->driver_data;
> + hid_set_drvdata(hdev, sc);
>
> - if (quirks & MS_NOGET)
> + if (sc->quirks & MS_NOGET)
> hdev->quirks |= HID_QUIRK_NOGET;
>
> ret = hid_parse(hdev);
> @@ -243,7 +255,7 @@ static int ms_probe(struct hid_device *hdev, const struct hid_device_id *id)
> goto err_free;
> }
>
> - ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT | ((quirks & MS_HIDINPUT) ?
> + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT | ((sc->quirks & MS_HIDINPUT) ?
> HID_CONNECT_HIDINPUT_FORCE : 0));
> if (ret) {
> hid_err(hdev, "hw start failed\n");
> --
> 1.9.1
>
> --
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