USB host controllers now must handle highmem, so we can get rid of bounce
buffering highmem pages in the block layer.
Signed-off-by: Christoph Hellwig <h...@lst.de>
---
drivers/usb/storage/scsiglue.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index c267f2812a04..4e453d9d45d5 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -130,15 +130,6 @@ static int slave_configure(struct scsi_device *sdev)
blk_queue_max_hw_sectors(sdev->request_queue, 2048);
}
- /*
- * Some USB host controllers can't do DMA; they have to use PIO.
- * They indicate this by setting their dma_mask to NULL. For
- * such controllers we need to make sure the block layer sets
- * up bounce buffers in addressable memory.
- */
- if (!us->pusb_dev->bus->controller->dma_mask)
- blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH);
-
/*
* We can't put these settings in slave_alloc() because that gets
* called before the device type is known. Consequently these
--
2.17.0
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