Messages in this thread | | | Date | Thu, 15 Dec 2005 19:23:42 +0530 | From | Block Device <> | Subject | Bdev->bd_disk is NULL @ initrd time |
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Hi,
I have a problem running the following code snippet from a kernel module.
struct block_device *bdev=bdget(MKDEV(3,10));
if(!bdev){ printk(KERN_ALERT "NULL bdev.!!!\n"); return -1; }
if(!bdev->bd_disk){ printk(KERN_ALERT "NULL bdev bd_disk.!!!\n"); return -1; } printk(KERN_ALERT "Diskname is %s.\n",bdev->bd_disk->disk_name);
When this module is inserted from initrd's init script ( after block drivers are loaded ) bdev->bd_disk is always NULL. But when its inserted after the system has booted it works fine. Can someone please explain this behaviour ?.
I checked that the block devices are up by spawning a shell just after this module is inserted from the init script. When I cat /proc/devices the ide device shows up.
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