Re: [PATCH] CDRW packet writing support for 2.6.7-bk13

[Peter Osterlund <petero2@telia.com>]

Peter Osterlund <petero2@telia.com> writes:

> This patch implements CDRW packet writing as a kernel block device.
> Usage instructions are in the packet-writing.txt file.
...
> +static int pkt_proc_device(struct pktcdvd_device *pd, char *buf)
> +{
> +	char *b = buf, *msg;
> +	char bdev_buf[BDEVNAME_SIZE];
> +	int states[PACKET_NUM_STATES];
> +
> +	b += sprintf(b, "\nWriter %s mapped to %s:\n", pd->name,
> +		     __bdevname(pd->dev, bdev_buf));

This code leaks a module reference. The patch below fixes it. I'm not
sure it's correct, but do_open() also does module_put() after
put_disk().

Signed-off-by: Peter Osterlund <petero2@telia.com>

---

 linux-petero/fs/partitions/check.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN fs/partitions/check.c~packet-refcnt fs/partitions/check.c
--- linux/fs/partitions/check.c~packet-refcnt	2004-07-02 23:18:22.000000000 +0200
+++ linux-petero/fs/partitions/check.c	2004-07-02 23:18:23.000000000 +0200
@@ -151,6 +151,7 @@ const char *__bdevname(dev_t dev, char *
 	if (disk) {
 		buffer = disk_name(disk, part, buffer);
 		put_disk(disk);
+		module_put(disk->fops->owner);
 	} else {
 		snprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)",
 				MAJOR(dev), MINOR(dev));
_

-- 
Peter Osterlund - petero2@telia.com
http://w1.894.telia.com/~u89404340