Move special preparation steps done before the call to
usb_stor_read_10() inside the function itself for clarity and to allow
futher code improvements. No functional change intended.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
drivers/usb/storage/usb.c | 41 ++++++++++++++++++++++++---------------
1 file changed, 25 insertions(+), 16 deletions(-)
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 52d4e24de..e6f8f30c6 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -160,29 +160,36 @@ static int usb_stor_read_capacity(struct us_blk_dev *usb_blkdev,
return result ? -EIO : 0;
}
-static int usb_stor_read_10(ccb *srb, struct us_data *us,
- unsigned long start, unsigned short blocks)
+static int usb_stor_read_10(struct us_blk_dev *usb_blkdev,
+ unsigned long start, u8 *data,
+ unsigned short blocks)
{
+ struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
int retries, result;
+ ccb srb;
+
+ srb.lun = usb_blkdev->lun;
+ srb.pdata = data;
+ srb.datalen = blocks * SECTOR_SIZE;
retries = 2;
do {
dev_dbg(dev, "SCSI_READ10: start %lx blocks %x\n", start, blocks);
- memset(&srb->cmd[0], 0, 10);
- srb->cmdlen = 10;
- srb->cmd[0] = SCSI_READ10;
- srb->cmd[2] = (u8)(start >> 24);
- srb->cmd[3] = (u8)(start >> 16);
- srb->cmd[4] = (u8)(start >> 8);
- srb->cmd[5] = (u8)(start >> 0);
- srb->cmd[7] = (u8)(blocks >> 8);
- srb->cmd[8] = (u8)(blocks >> 0);
- result = us->transport(srb, us);
+ memset(&srb.cmd[0], 0, 10);
+ srb.cmdlen = 10;
+ srb.cmd[0] = SCSI_READ10;
+ srb.cmd[2] = (u8)(start >> 24);
+ srb.cmd[3] = (u8)(start >> 16);
+ srb.cmd[4] = (u8)(start >> 8);
+ srb.cmd[5] = (u8)(start >> 0);
+ srb.cmd[7] = (u8)(blocks >> 8);
+ srb.cmd[8] = (u8)(blocks >> 0);
+ result = us->transport(&srb, us);
dev_dbg(dev, "SCSI_READ10 returns %d\n", result);
if (result == USB_STOR_TRANSPORT_GOOD)
return 0;
- usb_stor_request_sense(srb, us);
+ usb_stor_request_sense(&srb, us);
} while (retries--);
return -EIO;
@@ -283,11 +290,13 @@ static int usb_stor_blk_io(int io_op, struct block_device *disk_dev,
while (sector_count > 0) {
int result;
unsigned n = min(sector_count, US_MAX_IO_BLK);
- us_ccb.pdata = buffer + (sectors_done * SECTOR_SIZE);
+ u8 *data = buffer + (sectors_done * SECTOR_SIZE);
+ us_ccb.pdata = data;
us_ccb.datalen = n * SECTOR_SIZE;
if (io_op == io_rd)
- result = usb_stor_read_10(&us_ccb, us,
- (ulong)sector_start, n);
+ result = usb_stor_read_10(pblk_dev,
+ (ulong)sector_start,
+ data, n);
else
result = usb_stor_write_10(&us_ccb, us,
(ulong)sector_start, n);
--
2.20.1
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
