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[RFC/RFT,12/14] radio-mr800: preserve radio state during suspend/resume

Message ID 4AAC6595.5090401@gmail.com (mailing list archive)
State Accepted
Delegated to: Douglas Landgraf
Headers show

Commit Message

David Ellingsworth Sept. 13, 2009, 3:23 a.m. UTC 
From 8c441616f67011244cb15bc1a3dda6fd8706ecd2 Mon Sep 17 00:00:00 2001
From: David Ellingsworth <david@identd.dyndns.org>
Date: Sat, 12 Sep 2009 16:04:44 -0400
Subject: [PATCH 08/14] mr800: fix potential use after free

Signed-off-by: David Ellingsworth <david@identd.dyndns.org>
---
 drivers/media/radio/radio-mr800.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

 /* vidioc_querycap - query device capabilities */
diff mbox

Patch

From c8c27c663db7294c660a3bac659742c915ce91a9 Mon Sep 17 00:00:00 2001
From: David Ellingsworth <david@identd.dyndns.org>
Date: Sat, 12 Sep 2009 22:01:49 -0400
Subject: [PATCH 12/14] mr800: preserve radio state during suspend/resume

Signed-off-by: David Ellingsworth <david@identd.dyndns.org>
---
 drivers/media/radio/radio-mr800.c |   33 ++++++++++++++++++++++++++++-----
 1 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
index 8fc413d..ed734bb 100644
--- a/drivers/media/radio/radio-mr800.c
+++ b/drivers/media/radio/radio-mr800.c
@@ -573,9 +573,12 @@  static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
 
 	mutex_lock(&radio->lock);
 
-	retval = amradio_set_mute(radio, AMRADIO_STOP);
-	if (retval < 0)
-		dev_warn(&intf->dev, "amradio_stop failed\n");
+	if (!radio->muted && radio->initialized) {
+		retval = amradio_set_mute(radio, AMRADIO_STOP);
+		if (retval < 0)
+			dev_warn(&intf->dev, "amradio_stop failed\n");
+		radio->muted = 0;
+	}
 
 	dev_info(&intf->dev, "going into suspend..\n");
 
@@ -591,10 +594,30 @@  static int usb_amradio_resume(struct usb_interface *intf)
 
 	mutex_lock(&radio->lock);
 
-	retval = amradio_set_mute(radio, AMRADIO_START);
+	if (unlikely(!radio->initialized))
+		goto unlock;
+
+	if (radio->stereo)
+		retval = amradio_set_stereo(radio, WANT_STEREO);
+	else
+		retval = amradio_set_stereo(radio, WANT_MONO);
+
 	if (retval < 0)
-		dev_warn(&intf->dev, "amradio_start failed\n");
+		amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n");
 
+	retval = amradio_setfreq(radio, radio->curfreq);
+	if (retval < 0)
+		amradio_dev_warn(&radio->videodev.dev,
+			"set frequency failed\n");
+
+	if (!radio->muted) {
+		retval = amradio_set_mute(radio, AMRADIO_START);
+		if (retval < 0)
+			dev_warn(&radio->videodev.dev,
+				"amradio_start failed\n");
+	}
+
+unlock:
 	dev_info(&intf->dev, "coming out of suspend..\n");
 
 	mutex_unlock(&radio->lock);
-- 
1.6.3.3