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authorAndrey Smirnov <andrew.smirnov@gmail.com>2019-03-07 00:00:15 -0800
committerSascha Hauer <s.hauer@pengutronix.de>2019-03-11 08:11:18 +0100
commitc475093a8599f9aba03cb5dd39da7dea86ebb17a (patch)
treef1583f5b0cad6d06be7bf9e23ad20fd93094f6e7 /drivers/usb/storage/usb.c
parent07580fc68955d2a94a26d241e278e50fd87123b4 (diff)
downloadbarebox-c475093a8599f9aba03cb5dd39da7dea86ebb17a.tar.gz
usb: storage: Make usb_stor_inquiry() a standalone function
Move special preparation steps done before and after call to usb_stor_inquiry() 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> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/usb/storage/usb.c')
-rw-r--r--drivers/usb/storage/usb.c52
1 files changed, 30 insertions, 22 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index f439cd8..05a3a03 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -37,30 +37,43 @@ static LIST_HEAD(us_blkdev_list);
* USB Storage routines
***********************************************************************/
-static int usb_stor_inquiry(ccb *srb, struct us_data *us)
+static int usb_stor_inquiry(struct us_blk_dev *usb_blkdev)
{
+ struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
int retries, result;
+ ccb srb;
+ u8 *data = xzalloc(36);
- srb->datalen = min(128UL, srb->datalen);
- if (srb->datalen < 5) {
- dev_dbg(dev, "SCSI_INQUIRY: invalid data buffer size\n");
- return -EINVAL;
- }
+ srb.lun = usb_blkdev->lun;
+ srb.pdata = data;
+ srb.datalen = 36;
retries = 3;
do {
dev_dbg(dev, "SCSI_INQUIRY\n");
- memset(&srb->cmd[0], 0, 6);
- srb->cmdlen = 6;
- srb->cmd[0] = SCSI_INQUIRY;
- srb->cmd[3] = (u8)(srb->datalen >> 8);
- srb->cmd[4] = (u8)(srb->datalen >> 0);
- result = us->transport(srb, us);
+ memset(&srb.cmd[0], 0, 6);
+ srb.cmdlen = 6;
+ srb.cmd[0] = SCSI_INQUIRY;
+ srb.cmd[3] = (u8)(srb.datalen >> 8);
+ srb.cmd[4] = (u8)(srb.datalen >> 0);
+ result = us->transport(&srb, us);
dev_dbg(dev, "SCSI_INQUIRY returns %d\n", result);
- } while ((result != USB_STOR_TRANSPORT_GOOD) && retries--);
+ if (result == USB_STOR_TRANSPORT_GOOD) {
+ dev_dbg(dev, "Peripheral type: %x, removable: %x\n",
+ data[0], (data[1] >> 7));
+ dev_dbg(dev, "ISO ver: %x, resp format: %x\n",
+ data[2], data[3]);
+ dev_dbg(dev, "Vendor/product/rev: %28s\n",
+ &data[8]);
+ // TODO: process and store device info
+ break;
+ }
+ } while (retries--);
- return (result != USB_STOR_TRANSPORT_GOOD) ? -EIO : 0;
+ free(data);
+
+ return result ? -ENODEV : 0;
}
static int usb_stor_request_sense(ccb *srb, struct us_data *us)
@@ -344,17 +357,12 @@ static int usb_stor_init_blkdev(struct us_blk_dev *pblk_dev)
/* get device info */
dev_dbg(dev, "Reading device info\n");
- us_ccb.datalen = 36;
- if (usb_stor_inquiry(&us_ccb, us)) {
+
+ result = usb_stor_inquiry(pblk_dev);
+ if (result) {
dev_dbg(dev, "Cannot read device info\n");
- result = -ENODEV;
goto Exit;
}
- dev_dbg(dev, "Peripheral type: %x, removable: %x\n",
- us_io_buf[0], (us_io_buf[1] >> 7));
- dev_dbg(dev, "ISO ver: %x, resp format: %x\n", us_io_buf[2], us_io_buf[3]);
- dev_dbg(dev, "Vendor/product/rev: %28s\n", &us_io_buf[8]);
- // TODO: process and store device info
/* ensure unit ready */
dev_dbg(dev, "Testing for unit ready\n");