13 files changed, 185 insertions, 31 deletions

diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c
index 1f064f4b32df..b657c7bb47cc 100644
--- a/drivers/media/radio/radio-aimslab.c
+++ b/drivers/media/radio/radio-aimslab.c
@@ -51,6 +51,7 @@ static struct mutex lock;
 
 struct rt_device
 {
+        unsigned long in_use;
         int port;
         int curvol;
         unsigned long curfreq;
@@ -378,10 +379,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
 
 static struct rt_device rtrack_unit;
 
+static int rtrack_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &rtrack_unit.in_use) ? -EBUSY : 0;
+}
+
+static int rtrack_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &rtrack_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations rtrack_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = rtrack_exclusive_open,
+        .release        = rtrack_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-aztech.c b/drivers/media/radio/radio-aztech.c
index 628c689e3ffe..ae18a7cf0d59 100644
--- a/drivers/media/radio/radio-aztech.c
+++ b/drivers/media/radio/radio-aztech.c
@@ -70,6 +70,7 @@ static struct mutex lock;
 
 struct az_device
 {
+        unsigned long in_use;
         int curvol;
         unsigned long curfreq;
         int stereo;
@@ -342,10 +343,21 @@ static int vidioc_s_ctrl (struct file *file, void *priv,
 
 static struct az_device aztech_unit;
 
+static int aztech_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &aztech_unit.in_use) ? -EBUSY : 0;
+}
+
+static int aztech_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &aztech_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations aztech_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = aztech_exclusive_open,
+        .release        = aztech_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-gemtek-pci.c b/drivers/media/radio/radio-gemtek-pci.c
index 5cd7f032298d..a7b9a5df4ca7 100644
--- a/drivers/media/radio/radio-gemtek-pci.c
+++ b/drivers/media/radio/radio-gemtek-pci.c
@@ -100,9 +100,8 @@ struct gemtek_pci_card {
         u8  mute;
 };
 
-static const char rcsid[] = "$Id: radio-gemtek-pci.c,v 1.1 2001/07/23 08:08:16 ted Exp ted $";
-
 static int nr_radio = -1;
+static unsigned long in_use;
 
 static inline u8 gemtek_pci_out( u16 value, u32 port )
 {
@@ -364,10 +363,21 @@ MODULE_DEVICE_TABLE( pci, gemtek_pci_id );
 
 static int mx = 1;
 
+static int gemtek_pci_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int gemtek_pci_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &in_use);
+        return 0;
+}
+
 static const struct file_operations gemtek_pci_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = gemtek_pci_exclusive_open,
+        .release        = gemtek_pci_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
index 0a0f956bb308..cc90329026f2 100644
--- a/drivers/media/radio/radio-gemtek.c
+++ b/drivers/media/radio/radio-gemtek.c
@@ -57,6 +57,7 @@ static int shutdown	= 1;
 static int keepmuted    = 1;
 static int initmute     = 1;
 static int radio_nr     = -1;
+static unsigned long in_use;
 
 module_param(io, int, 0444);
 MODULE_PARM_DESC(io, "Force I/O port for the GemTek Radio card if automatic "
@@ -393,10 +394,21 @@ static struct v4l2_queryctrl radio_qctrl[] = {
         }
 };
 
+static int gemtek_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int gemtek_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &in_use);
+        return 0;
+}
+
 static const struct file_operations gemtek_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = gemtek_exclusive_open,
+        .release        = gemtek_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c
index 9ef0a763eeb7..03c20948eef2 100644
--- a/drivers/media/radio/radio-maestro.c
+++ b/drivers/media/radio/radio-maestro.c
@@ -75,7 +75,21 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 static int radio_nr = -1;
 module_param(radio_nr, int, 0);
 
+static unsigned long in_use;
+
 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+
+static int maestro_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int maestro_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &in_use);
+        return 0;
+}
+
 static void maestro_remove(struct pci_dev *pdev);
 
 static struct pci_device_id maestro_r_pci_tbl[] = {
@@ -98,8 +112,8 @@ static struct pci_driver maestro_r_driver = {
 
 static const struct file_operations maestro_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = maestro_exclusive_open,
+        .release        = maestro_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-maxiradio.c b/drivers/media/radio/radio-maxiradio.c
index 0cc6fcb041fd..263ef8b02fd8 100644
--- a/drivers/media/radio/radio-maxiradio.c
+++ b/drivers/media/radio/radio-maxiradio.c
@@ -85,6 +85,7 @@ static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
 static int radio_nr = -1;
 module_param(radio_nr, int, 0);
 
+static unsigned long in_use;
 
 #define FREQ_LO          50*16000
 #define FREQ_HI         150*16000
@@ -99,10 +100,21 @@ module_param(radio_nr, int, 0);
 #define BITS2FREQ(x)    ((x) * FREQ_STEP - FREQ_IF)
 
 
+static int maxiradio_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int maxiradio_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &in_use);
+        return 0;
+}
+
 static const struct file_operations maxiradio_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = maxiradio_exclusive_open,
+        .release        = maxiradio_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-rtrack2.c b/drivers/media/radio/radio-rtrack2.c
index 6d820e2481e7..5b93b47be714 100644
--- a/drivers/media/radio/radio-rtrack2.c
+++ b/drivers/media/radio/radio-rtrack2.c
@@ -52,6 +52,7 @@ static spinlock_t lock;
 
 struct rt_device
 {
+        unsigned long in_use;
         int port;
         unsigned long curfreq;
         int muted;
@@ -284,10 +285,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
 
 static struct rt_device rtrack2_unit;
 
+static int rtrack2_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &rtrack2_unit.in_use) ? -EBUSY : 0;
+}
+
+static int rtrack2_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &rtrack2_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations rtrack2_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = rtrack2_exclusive_open,
+        .release        = rtrack2_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c
index 0d478f54a907..55f8334513f3 100644
--- a/drivers/media/radio/radio-sf16fmi.c
+++ b/drivers/media/radio/radio-sf16fmi.c
@@ -45,6 +45,7 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 
 struct fmi_device
 {
+        unsigned long in_use;
         int port;
         int curvol; /* 1 or 0 */
         unsigned long curfreq; /* freq in kHz */
@@ -284,10 +285,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
 
 static struct fmi_device fmi_unit;
 
+static int fmi_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &fmi_unit.in_use) ? -EBUSY : 0;
+}
+
+static int fmi_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &fmi_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations fmi_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = fmi_exclusive_open,
+        .release        = fmi_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-sf16fmr2.c b/drivers/media/radio/radio-sf16fmr2.c
index 6290553d24be..14153ed939d0 100644
--- a/drivers/media/radio/radio-sf16fmr2.c
+++ b/drivers/media/radio/radio-sf16fmr2.c
@@ -64,6 +64,7 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 /* this should be static vars for module size */
 struct fmr2_device
 {
+        unsigned long in_use;
         int port;
         int curvol; /* 0-15 */
         int mute;
@@ -400,10 +401,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
 
 static struct fmr2_device fmr2_unit;
 
+static int fmr2_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &fmr2_unit.in_use) ? -EBUSY : 0;
+}
+
+static int fmr2_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &fmr2_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations fmr2_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = fmr2_exclusive_open,
+        .release        = fmr2_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-terratec.c b/drivers/media/radio/radio-terratec.c
index 0876fecc5f27..eed14972a940 100644
--- a/drivers/media/radio/radio-terratec.c
+++ b/drivers/media/radio/radio-terratec.c
@@ -79,6 +79,7 @@ static spinlock_t lock;
 
 struct tt_device
 {
+        unsigned long in_use;
         int port;
         int curvol;
         unsigned long curfreq;
@@ -356,10 +357,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
 
 static struct tt_device terratec_unit;
 
+static int terratec_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &terratec_unit.in_use) ? -EBUSY : 0;
+}
+
+static int terratec_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &terratec_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations terratec_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = terratec_exclusive_open,
+        .release        = terratec_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-trust.c b/drivers/media/radio/radio-trust.c
index 193161956253..dd0c425ef3b8 100644
--- a/drivers/media/radio/radio-trust.c
+++ b/drivers/media/radio/radio-trust.c
@@ -78,6 +78,7 @@ static __u16 curtreble;
 static unsigned long curfreq;
 static int curstereo;
 static int curmute;
+static unsigned long in_use;
 
 /* i2c addresses */
 #define TDA7318_ADDR 0x88
@@ -336,10 +337,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
         return 0;
 }
 
+static int trust_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int trust_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &in_use);
+        return 0;
+}
+
 static const struct file_operations trust_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = trust_exclusive_open,
+        .release        = trust_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
diff --git a/drivers/media/radio/radio-typhoon.c b/drivers/media/radio/radio-typhoon.c
index f8d62cfea774..878468507237 100644
--- a/drivers/media/radio/radio-typhoon.c
+++ b/drivers/media/radio/radio-typhoon.c
@@ -79,7 +79,7 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 #endif
 
 struct typhoon_device {
-        int users;
+        unsigned long in_use;
         int iobase;
         int curvol;
         int muted;
@@ -334,10 +334,21 @@ static struct typhoon_device typhoon_unit =
         .mutefreq       = CONFIG_RADIO_TYPHOON_MUTEFREQ,
 };
 
+static int typhoon_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &typhoon_unit.in_use) ? -EBUSY : 0;
+}
+
+static int typhoon_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &typhoon_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations typhoon_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = typhoon_exclusive_open,
+        .release        = typhoon_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,
@@ -447,8 +458,7 @@ static int __init typhoon_init(void)
         }
 
         typhoon_radio.priv = &typhoon_unit;
-        if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1)
-        {
+        if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
                 release_region(io, 8);
                 return -EINVAL;
         }
diff --git a/drivers/media/radio/radio-zoltrix.c b/drivers/media/radio/radio-zoltrix.c
index 51d57ed3b3e1..4d76e710194b 100644
--- a/drivers/media/radio/radio-zoltrix.c
+++ b/drivers/media/radio/radio-zoltrix.c
@@ -69,6 +69,7 @@ static int io = CONFIG_RADIO_ZOLTRIX_PORT;
 static int radio_nr = -1;
 
 struct zol_device {
+        unsigned long in_use;
         int port;
         int curvol;
         unsigned long curfreq;
@@ -396,11 +397,22 @@ static int vidioc_s_audio(struct file *file, void *priv,
 
 static struct zol_device zoltrix_unit;
 
+static int zoltrix_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &zoltrix_unit.in_use) ? -EBUSY : 0;
+}
+
+static int zoltrix_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &zoltrix_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations zoltrix_fops =
 {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = zoltrix_exclusive_open,
+        .release        = zoltrix_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,