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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 07/26] usb: storage: Make usb_stor_read_10() a standalone function
Date: Thu,  7 Mar 2019 00:00:17 -0800	[thread overview]
Message-ID: <20190307080036.28028-8-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190307080036.28028-1-andrew.smirnov@gmail.com>

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@gmail.com>
---
 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


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  parent reply	other threads:[~2019-03-07  8:00 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-07  8:00 [PATCH 00/26] USB storage improvements Andrey Smirnov
2019-03-07  8:00 ` [PATCH 01/26] usb: storage: Simplify memory allocation in usb_stor_probe() Andrey Smirnov
2019-03-07  8:00 ` [PATCH 02/26] usb: storage: Replace custom debug tracing with dev_dbg Andrey Smirnov
2019-03-07  8:00 ` [PATCH 03/26] usb: storage: Don't use "unsigned long" for 32-bit values Andrey Smirnov
2019-03-07  8:00 ` [PATCH 04/26] usb: storage: Make usb_stor_read_capacity() a standalone function Andrey Smirnov
2019-03-07  8:00 ` [PATCH 05/26] usb: storage: Make usb_stor_inquiry() " Andrey Smirnov
2019-03-07  8:00 ` [PATCH 06/26] usb: storage: Make usb_stor_test_unit_ready() " Andrey Smirnov
2019-03-07  8:00 ` Andrey Smirnov [this message]
2019-03-07  8:00 ` [PATCH 08/26] usb: storage: Make usb_stor_write_10() " Andrey Smirnov
2019-03-07  8:00 ` [PATCH 09/26] usb: storage: Drop extra call to transport in usb_stor_write_10() Andrey Smirnov
2019-03-07  8:00 ` [PATCH 10/26] usb: storage: Share code for READ(10) and WRITE(10) Andrey Smirnov
2019-03-07  8:00 ` [PATCH 11/26] usb: storage: Make usb_stor_request_sense() a standalone function Andrey Smirnov
2019-03-07  8:00 ` [PATCH 12/26] usb: storage: Remove unused variables Andrey Smirnov
2019-03-07  8:00 ` [PATCH 13/26] usb: storage: Drop struct SCSI_cmd_block Andrey Smirnov
2019-03-07  8:00 ` [PATCH 14/26] usb: hub: Do not include <scsi.h> Andrey Smirnov
2019-03-07  8:00 ` [PATCH 15/26] ata: ahci: " Andrey Smirnov
2019-03-07  8:00 ` [PATCH 16/26] usb: storage: Drop unused fields in struct us_data Andrey Smirnov
2019-03-07  8:00 ` [PATCH 17/26] usb: storage: Drop unused us_blkdev_list Andrey Smirnov
2019-03-07  8:00 ` [PATCH 18/26] usb: storage: Introduce usb_stor_transport() Andrey Smirnov
2019-03-07  8:00 ` [PATCH 19/26] usb: storage: Use put_unaligned_be* helpers Andrey Smirnov
2019-03-07  8:00 ` [PATCH 20/26] usb: Drop usb_disable_asynch() Andrey Smirnov
2019-03-07  8:00 ` [PATCH 21/26] usb: storage: Drop unnecessary check in usb_stor_blk_io() Andrey Smirnov
2019-03-07  8:00 ` [PATCH 22/26] usb: storage: Drop needless macro Andrey Smirnov
2019-03-07  8:00 ` [PATCH 23/26] usb: storage: Use simple boolean to speficy read vs. write operation Andrey Smirnov
2019-03-07  8:00 ` [PATCH 24/26] usb: storage: Simplify I/O loop in usb_stor_blk_io() Andrey Smirnov
2019-03-07  8:00 ` [PATCH 25/26] usb: storage: Drop unnecessary assignment Andrey Smirnov
2019-03-07  8:00 ` [PATCH 26/26] usb: storage: Inline usb_limit_blk_cnt() Andrey Smirnov
2019-03-11  7:11 ` [PATCH 00/26] USB storage improvements Sascha Hauer

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