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authorChristoph Hellwig <hch@lst.de>2024-02-13 08:34:13 +0100
committerJens Axboe <axboe@kernel.dk>2024-02-13 08:56:59 -0700
commitc490f226a0ea22639e81ac34edc884e238ea955a (patch)
tree5fb754b83ebe924687562fae331283830892f109 /block/blk-settings.c
parentb9947297d00b9c75b271db88165e39c0208bec2e (diff)
block: decouple blk_set_stacking_limits from blk_set_default_limits
blk_set_stacking_limits uses very little from blk_set_default_limits. Open code these initializations in preparation for rewriting blk_set_default_limits. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20240213073425.1621680-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index f16d3fec6658..24042f6b33d5 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -65,13 +65,18 @@ void blk_set_default_limits(struct queue_limits *lim)
* blk_set_stacking_limits - set default limits for stacking devices
* @lim: the queue_limits structure to reset
*
- * Description:
- * Returns a queue_limit struct to its default state. Should be used
- * by stacking drivers like DM that have no internal limits.
+ * Prepare queue limits for applying limits from underlying devices using
+ * blk_stack_limits().
*/
void blk_set_stacking_limits(struct queue_limits *lim)
{
- blk_set_default_limits(lim);
+ memset(lim, 0, sizeof(*lim));
+ lim->logical_block_size = SECTOR_SIZE;
+ lim->physical_block_size = SECTOR_SIZE;
+ lim->io_min = SECTOR_SIZE;
+ lim->discard_granularity = SECTOR_SIZE;
+ lim->dma_alignment = SECTOR_SIZE - 1;
+ lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
/* Inherit limits from component devices */
lim->max_segments = USHRT_MAX;