On Mon, Oct 31, 2016 at 11:29 PM, Christoph Hellwig [off-list ref] wrote:

On Sat, Oct 29, 2016 at 04:08:08PM +0800, Ming Lei wrote:

quoted

Avoid to access .bi_vcnt directly, because it may be not what
the driver expected any more after supporting multipage bvec.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>

It would be really nice to have a comment in the code why it's
even checking for multiple segments.

OK, will add comment about using !bio_multiple_segments(rq->bio)
to replace 'rq->bio->bi_vcnt == 1'.


Thanks,
Ming Lei