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>
diff --git a/block/blk-settings.c b/block/blk-settings.c
index f47af50..f8f2ddf 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -214,14 +214,16 @@
*/
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);