[Drbd-dev] ko-count overflow

[Apollonskiy Evgeniy]

Hello,

There is a strange code fragment in drbd_main.c:

	drop_it = !--mdev->ko_count;
	if (!drop_it) {
		dev_err(DEV, "[%s/%d] sock_sendmsg time expired, ko = %u\n",
		       current->comm, current->pid, mdev->ko_count);
		request_ping(mdev);
	}

Default value of ko_count is 0, so --mdev->ko_count will be equal to 
4294967295 (ko_count is unsigned int).
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