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author | James Morris <jmorris@namei.org> | 2009-06-19 08:20:55 +1000 |
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committer | James Morris <jmorris@namei.org> | 2009-06-19 08:20:55 +1000 |
commit | d905163c5b23f6d8511971e06081a1b525e8a0bd (patch) | |
tree | f76918c1be802ec068d37763466f5518efdb690e /drivers/media/video/au0828/au0828-core.c | |
parent | Add audit messages on type boundary violations (diff) | |
parent | Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 (diff) | |
download | linux-dev-d905163c5b23f6d8511971e06081a1b525e8a0bd.tar.xz linux-dev-d905163c5b23f6d8511971e06081a1b525e8a0bd.zip |
Merge branch 'master' into next
Diffstat (limited to 'drivers/media/video/au0828/au0828-core.c')
-rw-r--r-- | drivers/media/video/au0828/au0828-core.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/media/video/au0828/au0828-core.c b/drivers/media/video/au0828/au0828-core.c index a1e4c0d769a6..3544a2f12f13 100644 --- a/drivers/media/video/au0828/au0828-core.c +++ b/drivers/media/video/au0828/au0828-core.c @@ -36,6 +36,11 @@ int au0828_debug; module_param_named(debug, au0828_debug, int, 0644); MODULE_PARM_DESC(debug, "enable debug messages"); +static unsigned int disable_usb_speed_check; +module_param(disable_usb_speed_check, int, 0444); +MODULE_PARM_DESC(disable_usb_speed_check, + "override min bandwidth requirement of 480M bps"); + #define _AU0828_BULKPIPE 0x03 #define _BULKPIPESIZE 0xffff @@ -181,6 +186,18 @@ static int au0828_usb_probe(struct usb_interface *interface, le16_to_cpu(usbdev->descriptor.idProduct), ifnum); + /* + * Make sure we have 480 Mbps of bandwidth, otherwise things like + * video stream wouldn't likely work, since 12 Mbps is generally + * not enough even for most Digital TV streams. + */ + if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) { + printk(KERN_ERR "au0828: Device initialization failed.\n"); + printk(KERN_ERR "au0828: Device must be connected to a " + "high-speed USB 2.0 port.\n"); + return -ENODEV; + } + dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) { printk(KERN_ERR "%s() Unable to allocate memory\n", __func__); |