Commit 05df0166 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: update blk_stack_limits documentation 



Listing every single features that needs to be pre-set by stacking
drivers does not scale.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241104054218.45596-1-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 341468e0

block/blk-settings.c

+4 −4
Original line number Diff line number Diff line
@@ -508,10 +508,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, 
	t->features |= (b->features & BLK_FEAT_INHERIT_MASK);



	/*

	 * BLK_FEAT_NOWAIT and BLK_FEAT_POLL need to be supported both by the

	 * stacking driver and all underlying devices.  The stacking driver sets

	 * the flags before stacking the limits, and this will clear the flags

	 * if any of the underlying devices does not support it.

	 * Some feaures need to be supported both by the stacking driver and all

	 * underlying devices.  The stacking driver sets these flags before

	 * stacking the limits, and this will clear the flags if any of the

	 * underlying devices does not support it.

	 */

	if (!(b->features & BLK_FEAT_NOWAIT))

		t->features &= ~BLK_FEAT_NOWAIT;