[PATCH] scsi: set dma direction to NONE for TEST UNIT READY

[Nikita Yushchenko]

SCSI device scan code was executing TEST UNIT READY command without
explicitly setting dma direction in struct scsi_cmd to NONE, so command
was passed to driver with dma direction set to DMA_FROM_DEVICE,
inherited from older usage.

With WDC SDINDDH6-64G ufs device, that caused TEST UNIT READY to
return error.

Fix that, by explicitly setting dma direction to NONE for
TEST UNIT READY, and restoring it back DMA_FROM_DEVICE for the
following READ CAPACITY.

Signed-off-by: Nikita Yushchenko <nikita.yoush at cogentembedded.com>
---
 drivers/scsi/scsi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index b76aadb0653..1330482c167 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -374,6 +374,7 @@ static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb,
 	pccb->cmd[0] = SCSI_RD_CAPAC10;
 	pccb->cmd[1] = pccb->lun << 5;
 	pccb->cmdlen = 10;
+	pccb->dma_dir = DMA_FROM_DEVICE;
 	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 
 	pccb->datalen = 8;
@@ -538,6 +539,7 @@ static int scsi_detect_dev(struct udevice *dev, int target, int lun,
 
 	for (count = 0; count < 3; count++) {
 		pccb->datalen = 0;
+		pccb->dma_dir = DMA_NONE;
 		scsi_setup_test_unit_ready(pccb);
 		err = scsi_exec(dev, pccb);
 		if (!err)
-- 
2.39.2