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 <hch@xxxxxx> --- 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
