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HID: usbhid: Convert timers to use timer_setup()

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In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
(introduced by 686fef928b ("timer: Prepare to change timer callback
argument type")) to pass the timer pointer explicitly. Adds pointer back to
hid_device for multitouch.

[jkosina@suse.cz: extend changelog a little bit as asked for by Benjamin]
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Kees Cook
2017-10-04 17:53:24 -07:00
committed by Jiri Kosina
parent 77ede3a014
commit 0ee32774ae
2 changed files with 10 additions and 8 deletions
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10
drivers/hid/hid-multitouch.c
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@@ -112,6 +112,7 @@ struct mt_device {
struct mt_slot curdata; /* placeholder of incoming data */
struct mt_class mtclass; /* our mt device class */
struct timer_list release_timer; /* to release sticky fingers */
struct hid_device *hdev; /* hid_device we're attached to */
struct mt_fields *fields; /* temporary placeholder for storing the
multitouch fields */
unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
@@ -1246,10 +1247,10 @@ static void mt_release_contacts(struct hid_device *hid)
td->num_received = 0;
}
static void mt_expired_timeout(unsigned long arg)
static void mt_expired_timeout(struct timer_list *t)
{
struct hid_device *hdev = (void *)arg;
struct mt_device *td = hid_get_drvdata(hdev);
struct mt_device *td = from_timer(td, t, release_timer);
struct hid_device *hdev = td->hdev;
/*
* An input report came in just before we release the sticky fingers,
@@ -1280,6 +1281,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
dev_err(&hdev->dev, "cannot allocate multitouch data\n");
return -ENOMEM;
}
td->hdev = hdev;
td->mtclass = *mtclass;
td->inputmode = -1;
td->maxcontact_report_id = -1;
@@ -1331,7 +1333,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
*/
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
setup_timer(&td->release_timer, mt_expired_timeout, (long)hdev);
timer_setup(&td->release_timer, mt_expired_timeout, 0);
ret = hid_parse(hdev);
if (ret != 0)