diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-09-03 11:46:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-03 16:26:09 +0300 |
| commit | bf89015a54131253f963ee68b95461e6a3a4c462 (patch) | |
| tree | 7c247999a1747f93cc34573777fb436640784e7b | |
| parent | 8838d9224f84cbe04979edb005365af236d39410 (diff) | |
| download | linux-bf89015a54131253f963ee68b95461e6a3a4c462.tar.xz | |
usb-storage: use hcd_uses_dma to check for DMA capabilities
The dma_mask on its own doesn't mean much. Instead check for the actual
flag.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20190903084615.19161-4-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/storage/scsiglue.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index df4de8323eff..6737fab94959 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -40,6 +40,7 @@ #include <scsi/scsi_eh.h> #include "usb.h" +#include <linux/usb/hcd.h> #include "scsiglue.h" #include "debug.h" #include "transport.h" @@ -141,11 +142,10 @@ static int slave_configure(struct scsi_device *sdev) /* * 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 + * 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) + if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus))) blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH); /* |