zoran: Remove global device array

From: Trent Piepho <xyzzy@speakeasy.org>

The driver was keeping a global array with an entry for each zoran device
probed.  It was a leftover from when the driver didn't dynamically allocate
the driver data for each device.

There was only one use left, in the video device's ->open() method, looking
up the struct zoran for the opened device from the minor number.  This can
be done better with video_get_drvdata().

Since zoran_num is now only used in the pci driver's ->probe() method, it
doesn't need to be an atomic_t and be static.  There is a race if multiple
zoran cards could be probed at the same time, but currently the probe
method for a given driver is single threaded.

Priority: normal

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 3 insertions, 22 deletions

diff --git a/linux/drivers/media/video/zoran/zoran_driver.c b/linux/drivers/media/video/zoran/zoran_driver.c
index 6803ca326..c6a200504 100644
--- a/linux/drivers/media/video/zoran/zoran_driver.c
+++ b/linux/drivers/media/video/zoran/zoran_driver.c
@@ -1261,28 +1261,13 @@ zoran_close_end_session (struct file *file)
  *   Open a zoran card. Right now the flags stuff is just playing
  */
 
-static int
-zoran_open(struct file  *file)
+static int zoran_open(struct file *file)
 {
-	unsigned int minor = video_devdata(file)->minor;
-	struct zoran *zr = NULL;
+	struct zoran *zr = video_drvdata(file);
 	struct zoran_fh *fh;
-	int i, res, first_open = 0, have_module_locks = 0;
+	int res, first_open = 0, have_module_locks = 0;
 
 	lock_kernel();
-	/* find the device */
-	for (i = 0; i < atomic_read(&zoran_num); i++) {
-		if (zoran[i]->video_dev->minor == minor) {
-			zr = zoran[i];
-			break;
-		}
-	}
-
-	if (!zr) {
-		dprintk(1, KERN_ERR "%s: device not found!\n", ZORAN_NAME);
-		res = -ENODEV;
-		goto open_unlock_and_return;
-	}
 
 	/* see fs/device.c - the kernel already locks during open(),
 	 * so locking ourselves only causes deadlocks */
@@ -1394,10 +1379,6 @@ open_unlock_and_return:
 		module_put(THIS_MODULE);
 	}
 
-	/* if there's no device found, we didn't obtain the lock either */
-	if (zr) {
-		/*mutex_unlock(&zr->resource_lock);*/
-	}
 	unlock_kernel();
 
 	return res;