block: Do not clamp max_hw_sectors for stacking devices
Martin K. Petersen [Mon, 21 Sep 2009 19:46:05 +0000 (21:46 +0200)]
Stacking devices do not have an inherent max_hw_sector limit.  Set the
default to INT_MAX so we are bounded only by capabilities of the
underlying storage.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

block/blk-settings.c

index cd9b730..eaf122f 100644 (file)
@@ -111,7 +111,8 @@ 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 = BLK_DEF_MAX_SECTORS;
+       lim->max_sectors = BLK_DEF_MAX_SECTORS;
+       lim->max_hw_sectors = INT_MAX;
        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;