From: Alexey Klimov <klimov.linux@gmail.com>
To: Douglas Schilling Landgraf <dougsland@gmail.com>
Cc: video4linux-list@redhat.com
Subject: [PATCH 2/2] dsbr100: add suspend and resume
Date: Sat, 08 Nov 2008 03:40:46 +0300 [thread overview]
Message-ID: <1226104846.3959.13.camel@tux.localhost> (raw)
This patch adds support for suspend and resume methods in driver.
Without this kradio and gnomeradio crashes during resume.
Also .supports_autosuspend in usb_driver struct set equal to 0 to avoid
suspending of module if usb_autosuspend enabled.
Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
---
diff -r c716e749c7e5 linux/drivers/media/radio/dsbr100.c
--- a/linux/drivers/media/radio/dsbr100.c Sat Nov 08 03:01:20 2008 +0300
+++ b/linux/drivers/media/radio/dsbr100.c Sat Nov 08 03:11:38 2008 +0300
@@ -152,6 +152,9 @@
static void usb_dsbr100_disconnect(struct usb_interface *intf);
static int usb_dsbr100_open(struct inode *inode, struct file *file);
static int usb_dsbr100_close(struct inode *inode, struct file *file);
+static int usb_dsbr100_suspend(struct usb_interface *intf,
+ pm_message_t message);
+static int usb_dsbr100_resume(struct usb_interface *intf);
static int radio_nr = -1;
module_param(radio_nr, int, 0);
@@ -178,10 +181,16 @@
/* USB subsystem interface */
static struct usb_driver usb_dsbr100_driver = {
- .name = "dsbr100",
- .probe = usb_dsbr100_probe,
- .disconnect = usb_dsbr100_disconnect,
- .id_table = usb_dsbr100_device_table,
+ .name = "dsbr100",
+ .probe = usb_dsbr100_probe,
+ .disconnect = usb_dsbr100_disconnect,
+ .id_table = usb_dsbr100_device_table,
+ .suspend = usb_dsbr100_suspend,
+ .resume = usb_dsbr100_resume,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
+ .reset_resume = usb_dsbr100_resume,
+#endif
+ .supports_autosuspend = 0,
};
/* Low-level device interface begins here */
@@ -469,6 +478,36 @@
return 0;
}
+/* Suspend device - stop device. */
+static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct dsbr100_device *radio = usb_get_intfdata(intf);
+ int retval;
+
+ retval = dsbr100_stop(radio);
+ if (retval == -1)
+ dev_warn(&intf->dev, "dsbr100_stop failed\n");
+
+ dev_info(&intf->dev, "going into suspend..\n");
+
+ return 0;
+}
+
+/* Resume device - start device. */
+static int usb_dsbr100_resume(struct usb_interface *intf)
+{
+ struct dsbr100_device *radio = usb_get_intfdata(intf);
+ int retval;
+
+ retval = dsbr100_start(radio);
+ if (retval == -1)
+ dev_warn(&intf->dev, "dsbr100_start failed\n");
+
+ dev_info(&intf->dev, "coming out of suspend..\n");
+
+ return 0;
+}
+
/* File system interface */
static const struct file_operations usb_dsbr100_fops = {
.owner = THIS_MODULE,
--
Best regards, Klimov Alexey
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reply other threads:[~2008-11-08 0:40 UTC|newest]
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