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Date: Wed, 04 Oct 2006 00:32:59 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: akpm@...l.org, linux-kernel@...r.kernel.org, mchehab@...radead.org
Subject: [PATCH] video4linux: complete conversion to hotplug safe PCI API
Signed-off-by: Alan Cox <alan@...hat.com>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.18-mm3/drivers/media/video/zoran_card.c linux-2.6.18-mm3/drivers/media/video/zoran_card.c
--- linux.vanilla-2.6.18-mm3/drivers/media/video/zoran_card.c 2006-10-03 19:23:09.282343336 +0100
+++ linux-2.6.18-mm3/drivers/media/video/zoran_card.c 2006-09-25 12:21:26.000000000 +0100
@@ -1278,9 +1278,7 @@
zoran_num = 0;
while (zoran_num < BUZ_MAX &&
- (dev =
- pci_find_device(PCI_VENDOR_ID_ZORAN,
- PCI_DEVICE_ID_ZORAN_36057, dev)) != NULL) {
+ (dev = pci_get_device(PCI_VENDOR_ID_ZORAN, PCI_DEVICE_ID_ZORAN_36057, dev)) != NULL) {
card_num = card[zoran_num];
zr = &zoran[zoran_num];
memset(zr, 0, sizeof(struct zoran)); // Just in case if previous cycle failed
@@ -1541,7 +1539,8 @@
goto zr_detach_vfe;
}
}
-
+ /* Success so keep the pci_dev referenced */
+ pci_dev_get(zr->pci_dev);
zoran_num++;
continue;
@@ -1563,6 +1562,9 @@
iounmap(zr->zr36057_mem);
continue;
}
+ if (dev) /* Clean up ref count on early exit */
+ pci_dev_put(dev);
+
if (zoran_num == 0) {
dprintk(1, KERN_INFO "No known MJPEG cards found.\n");
}
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.18-mm3/drivers/media/video/zr36120.c linux-2.6.18-mm3/drivers/media/video/zr36120.c
--- linux.vanilla-2.6.18-mm3/drivers/media/video/zr36120.c 2006-10-03 19:23:09.286342728 +0100
+++ linux-2.6.18-mm3/drivers/media/video/zr36120.c 2006-09-28 14:52:58.000000000 +0100
@@ -1840,16 +1840,16 @@
struct zoran *ztv;
struct pci_dev *dev = NULL;
unsigned char revision;
- int zoran_num=0;
+ int zoran_num = 0;
- while ((dev = pci_find_device(PCI_VENDOR_ID_ZORAN,PCI_DEVICE_ID_ZORAN_36120, dev)))
+ while ((dev = pci_get_device(PCI_VENDOR_ID_ZORAN,PCI_DEVICE_ID_ZORAN_36120, dev)))
{
/* Ok, a ZR36120/ZR36125 found! */
ztv = &zorans[zoran_num];
ztv->dev = dev;
if (pci_enable_device(dev))
- return -EIO;
+ continue;
pci_read_config_byte(dev, PCI_CLASS_REVISION, &revision);
printk(KERN_INFO "zoran: Zoran %x (rev %d) ",
@@ -1867,17 +1867,18 @@
{
iounmap(ztv->zoran_mem);
printk(KERN_ERR "zoran: Bad irq number or handler\n");
- return -EINVAL;
+ continue;
}
if (result==-EBUSY)
printk(KERN_ERR "zoran: IRQ %d busy, change your PnP config in BIOS\n",dev->irq);
if (result < 0) {
iounmap(ztv->zoran_mem);
- return result;
+ continue;
}
/* Enable bus-mastering */
pci_set_master(dev);
-
+ /* Keep a reference */
+ pci_dev_get(dev);
zoran_num++;
}
if(zoran_num)
@@ -2041,6 +2042,9 @@
if (ztv->zoran_mem)
iounmap(ztv->zoran_mem);
+ /* Drop PCI device */
+ pci_dev_put(ztv->dev);
+
video_unregister_device(&ztv->video_dev);
video_unregister_device(&ztv->vbi_dev);
}
@@ -2057,13 +2061,12 @@
handle_chipset();
zoran_cards = find_zoran();
- if (zoran_cards<0)
- /* no cards found, no need for a driver */
+ if (zoran_cards <= 0)
return -EIO;
/* initialize Zorans */
for (card=0; card<zoran_cards; card++) {
- if (init_zoran(card)<0) {
+ if (init_zoran(card) < 0) {
/* only release the zorans we have registered */
release_zoran(card);
return -EIO;
-
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