提交 80ddf247 编写于 作者: M Martin K. Petersen 提交者: Jens Axboe

block: Set max_sectors correctly for stacking devices

The topology changes unintentionally caused SAFE_MAX_SECTORS to be set
for stacking devices.  Set the default limit to BLK_DEF_MAX_SECTORS and
provide SAFE_MAX_SECTORS in blk_queue_make_request() for legacy hw
drivers that depend on the old behavior.
Acked-by: NMike Snitzer <snitzer@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
上级 9f792d9f
......@@ -111,7 +111,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->max_hw_segments = MAX_HW_SEGMENTS;
lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
lim->max_segment_size = MAX_SEGMENT_SIZE;
lim->max_sectors = lim->max_hw_sectors = SAFE_MAX_SECTORS;
lim->max_sectors = lim->max_hw_sectors = BLK_DEF_MAX_SECTORS;
lim->logical_block_size = lim->physical_block_size = lim->io_min = 512;
lim->bounce_pfn = (unsigned long)(BLK_BOUNCE_ANY >> PAGE_SHIFT);
lim->alignment_offset = 0;
......@@ -164,6 +164,7 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
q->unplug_timer.data = (unsigned long)q;
blk_set_default_limits(&q->limits);
blk_queue_max_sectors(q, SAFE_MAX_SECTORS);
/*
* If the caller didn't supply a lock, fall back to our embedded
......
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