block: open code bio_add_page and fix handling of mismatching P2P ranges

block: open code bio_add_page and fix handling of mismatching P2P ranges

bio_add_page fails to add data to the bio when mixing P2P with non-P2P
ranges, or ranges that map to different P2P providers.  In that case
it will trigger that WARN_ON and return an error up the chain instead of
simply starting a new bio as intended.  Fix this by open coding
bio_add_page and handling this case explicitly.  While doing so, stop
merging physical contiguous data that belongs to multiple folios.  While
this merge could lead to more efficient bio packing in some case,
dropping will allow to remove handling of this corner case in other
places and make the code more robust.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Tested-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>