On Mon, 30 Jul 2012, Bruno Prémont wrote:
> Commit 4ea5454203d991ec85264f64f89ca8855fce69b0
> [HID: Fix race condition between driver core and ll-driver] introduced
> new locking around proce/remove functions that prevent any report/reply
> from hardware to reach driver until it returned from probe.
>
> As such, the ask-reply way to checking picoLCD firmware version during
> probe is bound to timeout and let probe fail.
>
> Disabling the check lets driver sucessfully probe again.
>
> Signed-off-by: Bruno Prémont <bonb...@linux-vserver.org>
> ---
> drivers/hid/hid-picolcd_core.c | 8 ++++----
> 1 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
> index 2d7ef68..42d0791 100644
> --- a/drivers/hid/hid-picolcd_core.c
> +++ b/drivers/hid/hid-picolcd_core.c
> @@ -478,13 +478,13 @@ static int picolcd_probe_lcd(struct hid_device *hdev,
> struct picolcd_data *data)
> {
> int error;
>
> - error = picolcd_check_version(hdev);
> +/* error = picolcd_check_version(hdev);
> if (error)
> return error;
>
> if (data->version[0] != 0 && data->version[1] != 3)
> hid_info(hdev, "Device with untested firmware revision, please
> submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
> - dev_name(&hdev->dev));
> + dev_name(&hdev->dev)); */
Please just remove it altogether, I don't see a reason to keep the
commented-out code in the in-tree driver.
Once the locking mess is sorted out, we can re-introduce it again as
necessary.
Thanks.
--
Jiri Kosina
SUSE Labs
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