On Sat, May 09, 2020 at 06:13:21AM +0800, Ming Lei wrote:

On Fri, May 08, 2020 at 06:15:02PM +0200, Christoph Hellwig wrote:

quoted

Hi all,

various bio based drivers use queue->queuedata despite already having
set up disk->private_data, which can be used just as easily.  This
series cleans them up to only use a single private data pointer.

blk-mq based drivers that have code pathes that can't easily get at
the gendisk are unaffected by this series.

Yeah, before adding disk, there still may be requests queued to LLD
for blk-mq based drivers.

So are there this similar situation for these bio based drivers?

bio submittsion is based on the gendisk, so we can't submit before
it is added.  The passthrough request based path obviously doesn't apply
here.