Re: [PATCH linux-2.6-block:master] block: fix cfq_find_next_crq

[Jens Axboe <axboe@suse.de>]

On Tue, Jul 26 2005, Tejun Heo wrote:
>  Hi,
> 
>  In cfq_find_next_crq(), when determining rbnext, if
> rb_next(&last->rb_node) is NULL, rb_first() is used without checking
> if it equals last.  If it equals last, rbnext should be NULL not last.
> This bug is masked by duplicate calls to cfq_find_next_crq which ends
> up clearing cfqq->next_crq as, on the second call, last isn't on rb
> tree.
> 
>  This patch fixes cfq_find_next_crq() and removes extra calls to
> cfq_update_next_crq().

Thanks, looks good!

-- 
Jens Axboe

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