On Thu, 28 Jun 2012, Matthieu CASTET wrote:
> When using hidraw, hid buffer can be big and take lot's of
> time to process (interrupt) kernel context.
> Don't try to parse report if we are only interrested in hidraw.
>
> Also don't prepare data for debug stuff if no debugfs file
> are opened.
>
> Signed-off-by: Matthieu CASTET <matthieu.castet@xxxxxxxxxx>
Nice catch. Applied, thanks.
> ---
> drivers/hid/hid-core.c | 10 ++++++++--
> drivers/hid/hid-picolcd.c | 2 +-
> 2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index 8e3a6b2..9f8f7c6 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -1194,8 +1194,10 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
> goto out;
> }
>
> - for (a = 0; a < report->maxfield; a++)
> - hid_input_field(hid, report->field[a], cdata, interrupt);
> + if (hid->claimed != HID_CLAIMED_HIDRAW) {
> + for (a = 0; a < report->maxfield; a++)
> + hid_input_field(hid, report->field[a], cdata, interrupt);
> + }
>
> if (hid->claimed & HID_CLAIMED_INPUT)
> hidinput_report_event(hid, report);
> @@ -1243,6 +1245,10 @@ int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int i
> goto unlock;
> }
>
> + /* Avoid unnecessary overhead if debugfs is disabled */
> + if (list_empty(&hid->debug_list))
> + goto nomem;
> +
> buf = kmalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_ATOMIC);
>
> if (!buf)
> diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c
> index 45c3433..3e0a1e5 100644
> --- a/drivers/hid/hid-picolcd.c
> +++ b/drivers/hid/hid-picolcd.c
> @@ -1846,7 +1846,7 @@ static void picolcd_debug_out_report(struct picolcd_data *data,
> #define BUFF_SZ 256
>
> /* Avoid unnecessary overhead if debugfs is disabled */
> - if (!hdev->debug_events)
> + if (list_empty(&hdev->debug_list))
> return;
>
> buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
> --
> 1.7.10.4
>
--
Jiri Kosina
SUSE Labs
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