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-rw-r--r--drivers/block/nbd.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 1147e4680c80..bdfbb2a7018c 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -236,6 +236,10 @@ static void nbd_size_update(struct nbd_device *nbd)
struct nbd_config *config = nbd->config;
struct block_device *bdev = bdget_disk(nbd->disk, 0);
+ if (config->flags & NBD_FLAG_SEND_TRIM) {
+ nbd->disk->queue->limits.discard_granularity = config->blksize;
+ blk_queue_max_discard_sectors(nbd->disk->queue, UINT_MAX);
+ }
blk_queue_logical_block_size(nbd->disk->queue, config->blksize);
blk_queue_physical_block_size(nbd->disk->queue, config->blksize);
set_capacity(nbd->disk, config->bytesize >> 9);
@@ -1050,6 +1054,8 @@ static void nbd_config_put(struct nbd_device *nbd)
nbd->config = NULL;
nbd->tag_set.timeout = 0;
+ nbd->disk->queue->limits.discard_granularity = 0;
+ blk_queue_max_discard_sectors(nbd->disk->queue, UINT_MAX);
blk_queue_flag_clear(QUEUE_FLAG_DISCARD, nbd->disk->queue);
mutex_unlock(&nbd->config_lock);
@@ -1502,8 +1508,8 @@ static int nbd_dev_add(int index)
*/
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, disk->queue);
- disk->queue->limits.discard_granularity = 512;
- blk_queue_max_discard_sectors(disk->queue, UINT_MAX);
+ disk->queue->limits.discard_granularity = 0;
+ blk_queue_max_discard_sectors(disk->queue, 0);
blk_queue_max_segment_size(disk->queue, UINT_MAX);
blk_queue_max_segments(disk->queue, USHRT_MAX);
blk_queue_max_hw_sectors(disk->queue, 65536);