block: revert bad fix for memory hotplug causing bounces

Revert "block: set the bounce_pfn to the actual DMA limit rather than to max memory"

This reverts commit c49825facfd4969585224a896a5e717f88450cad.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/block/blk-settings.c b/block/blk-settings.c
index f47af5031eaa..f8f2ddf20613 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -214,14 +214,16 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask)
          */
         if (b_pfn < (min_t(u64, 0xffffffffUL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
                 dma = 1;
+        q->limits.bounce_pfn = max_low_pfn;
 #else
         if (b_pfn < blk_max_low_pfn)
                 dma = 1;
-#endif
         q->limits.bounce_pfn = b_pfn;
+#endif
         if (dma) {
                 init_emergency_isa_pool();
                 q->bounce_gfp = GFP_NOIO | GFP_DMA;
+                q->limits.bounce_pfn = b_pfn;
         }
 }
 EXPORT_SYMBOL(blk_queue_bounce_limit);