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Input: wacom - switch mode upon system resume 

When Wacom devices wake up from a sleep, the switch mode command
(wacom_query_tablet_data) is needed before wacom_open is called.
wacom_query_tablet_data should not be executed inside wacom_open
since wacom_open is called more than once during probe.

wacom_retrieve_hid_descriptor is removed from wacom_resume due
to the fact that the required descriptors are stored properly
upon system resume.

Reported-and-tested-by: Anton Anikin <Anton@Anikin.name>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Cc: stable@kernel.org
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Ping Cheng 2010-04-13 23:07:52 -07:00 committed by Dmitry Torokhov
parent afb567e3fd
commit 014f61504a
1 changed files with 7 additions and 5 deletions
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12
drivers/input/tablet/wacom_sys.c
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@ -673,13 +673,15 @@ static int wacom_resume(struct usb_interface *intf)
int rv;
mutex_lock(&wacom->lock);
if (wacom->open) {
/* switch to wacom mode first */
wacom_query_tablet_data(intf, features);
if (wacom->open)
rv = usb_submit_urb(wacom->irq, GFP_NOIO);
/* switch to wacom mode if needed */
if (!wacom_retrieve_hid_descriptor(intf, features))
wacom_query_tablet_data(intf, features);
} else
else
rv = 0;
mutex_unlock(&wacom->lock);
return rv;