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-rw-r--r--block/blk-settings.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index ba6e0e97118c..d993d20dab3c 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -48,7 +48,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->max_discard_sectors = 0;
lim->max_hw_discard_sectors = 0;
lim->max_secure_erase_sectors = 0;
- lim->discard_granularity = 0;
+ lim->discard_granularity = 512;
lim->discard_alignment = 0;
lim->discard_misaligned = 0;
lim->logical_block_size = lim->physical_block_size = lim->io_min = 512;
@@ -309,6 +309,9 @@ void blk_queue_logical_block_size(struct request_queue *q, unsigned int size)
limits->logical_block_size = size;
+ if (limits->discard_granularity < limits->logical_block_size)
+ limits->discard_granularity = limits->logical_block_size;
+
if (limits->physical_block_size < size)
limits->physical_block_size = size;