Discussion:
[PATCH v3] storage: Enable multi-target mode as vendor driver does for SCM eUSCSI bridge
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Mark Knibbs
2014-10-20 18:33:18 UTC
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usb_stor_euscsi_init() enables multi-target mode for SCM eUSB SCSI bridge
devices. The control message it sends has wLength = 1 and the byte sent is
0x01. While that works, the SCM driver does it with wLength = 0. We may as
well match what the SCM driver does.

This includes the change from
[PATCH v2] storage: Fix timeout in usb_stor_euscsi_init() and usb_stor_huawei_e220_init()

Signed-off-by: Mark Knibbs <markk-yYnZraf+/sb10XsdtD+***@public.gmane.org>

---
v3: Add spaces, 5*HZ --> 5 * HZ
v2: Remove incorrect use of USB_CTRL_SET_TIMEOUT (=5000);
usb_stor_control_msg() timeout argument is actually specified in jiffies.

diff -up linux-3.17/drivers/usb/storage/initializers.c.orig linux-3.17/drivers/usb/storage/initializers.c
--- linux-3.17/drivers/usb/storage/initializers.c.orig 2014-10-05 20:23:04.000000000 +0100
+++ linux-3.17/drivers/usb/storage/initializers.c 2014-10-16 13:39:04.497910732 +0100
@@ -49,10 +49,9 @@ int usb_stor_euscsi_init(struct us_data
int result;

usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
- us->iobuf[0] = 0x1;
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
- 0x01, 0x0, us->iobuf, 0x1, 5000);
+ 0x01, 0x0, NULL, 0x0, 5 * HZ);
usb_stor_dbg(us, "-- result is %d\n", result);

return 0;
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