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staging: most: usb: add PM functions

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This patch adds the implementation of the PM functions resume and suspend.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Link: https://lore.kernel.org/r/1588680892-9413-1-git-send-email-christian.gromm@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Gromm 2020-05-05 14:14:52 +02:00 committed by Greg Kroah-Hartman
parent 4fdc18d3ce
commit 08e1b4274c
1 changed files with 28 additions and 0 deletions
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28
drivers/staging/most/usb/usb.c
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@ -1221,11 +1221,39 @@ static void hdm_disconnect(struct usb_interface *interface)
put_device(&mdev->dev);
}
static int hdm_suspend(struct usb_interface *interface, pm_message_t message)
{
struct most_dev *mdev = usb_get_intfdata(interface);
int i;
mutex_lock(&mdev->io_mutex);
for (i = 0; i < mdev->iface.num_channels; i++) {
most_stop_enqueue(&mdev->iface, i);
usb_kill_anchored_urbs(&mdev->busy_urbs[i]);
}
mutex_unlock(&mdev->io_mutex);
return 0;
}
static int hdm_resume(struct usb_interface *interface)
{
struct most_dev *mdev = usb_get_intfdata(interface);
int i;
mutex_lock(&mdev->io_mutex);
for (i = 0; i < mdev->iface.num_channels; i++)
most_resume_enqueue(&mdev->iface, i);
mutex_unlock(&mdev->io_mutex);
return 0;
}
static struct usb_driver hdm_usb = {
.name = "hdm_usb",
.id_table = usbid,
.probe = hdm_probe,
.disconnect = hdm_disconnect,
.resume = hdm_resume,
.suspend = hdm_suspend,
};
module_usb_driver(hdm_usb);