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SubjectRe: usb-storage fails to detect all luns after 2.4.19
Hi!

On Thu, Feb 20, 2003 at 10:30:37PM +0100, Oliver Graf wrote:
> The problem: a multi device usb card reader is correctly detected with
> its four subdevices with kernel 2.4.19(-acX). But any patch after this
> fails to detect the subdevices.
>
> Verbose output with 2.4.19-ac4 shows:
> usb-storage: GetMaxLUN command result is 1, data is 3
>
> 2.4.21-pre4 gives:
> usb-storage: GetMaxLUN command result is -32, data is 128
> usb-storage: clearing endpoint halt for pipe 0x80000880
>
> I tried to find the parts that changed between the version, but it seems
> not to be rooted in usb-storage.
>
> The call to usb_control_msg seems to timeout with the newer kernel
> (just a wild guess!).

It is a timeout:
usb-storage: New GUID 04831307fffe9ffffffffe97
usb-uhci.c: interrupt, status 2, frame# 1765
usb_control/bulk_msg: timeout
usb-storage: GetMaxLUN command result is -110, data is 128
> Finally I did a desparate modification: I return 3 from
> usb_stor_Bulk_max_lun just before the endpoint is cleared. This got my
> card reader up and running again, but it's very very dirty und certainly
> breaks other usb storage devices (I don't own).

A patch which defines a new unusual_dev is appended. But it's still
dirty, cause it sets max_lun to 3 for this device. It should be seen as
a workaround not as something that should go into the kernel.

If someone more elaborate needs more debug output to find the real
problem, feel free to contact me.

Regards,
Oliver.

--- linux-2.4.21-pre4/drivers/usb/storage/transport.h.orig 2003-02-25 07:49:43.000000000 +0100
+++ linux-2.4.21-pre4/drivers/usb/storage/transport.h 2003-02-26 09:04:34.000000000 +0100
@@ -75,6 +75,8 @@
#define US_PR_JUMPSHOT 0xf3 /* Lexar Jumpshot */
#endif

+#define US_PR_TEV6IN1 0xf4
+
/*
* Bulk only data structures
*/
--- linux-2.4.21-pre4/drivers/usb/storage/unusual_devs.h.orig 2003-02-25 07:51:12.000000000 +0100
+++ linux-2.4.21-pre4/drivers/usb/storage/unusual_devs.h 2003-02-26 09:04:34.000000000 +0100
@@ -90,6 +90,12 @@
"Nex II Digital",
US_SC_SCSI, US_PR_BULK, NULL, US_FL_START_STOP),

+/* Hack for the Tevion Card Reader 6in1 by Oliver Graf <ograf@rz-online.net> */
+UNUSUAL_DEV( 0x0483, 0x1307, 0x0000, 0x9999,
+ "Tevion",
+ "Card Reader 6in1",
+ US_SC_SCSI, US_PR_TEV6IN1, NULL, 0),
+
/* Reported by Paul Stewart <stewart@wetlogic.net>
* This entry is needed because the device reports Sub=ff */
UNUSUAL_DEV( 0x04a4, 0x0004, 0x0001, 0x0001,
--- linux-2.4.21-pre4/drivers/usb/storage/usb.c.orig 2003-02-25 07:50:12.000000000 +0100
+++ linux-2.4.21-pre4/drivers/usb/storage/usb.c 2003-02-26 09:04:33.000000000 +0100
@@ -849,6 +849,13 @@
ss->max_lun = usb_stor_Bulk_max_lun(ss);
break;

+ case US_PR_TEV6IN1:
+ ss->transport_name = "Bulk";
+ ss->transport = usb_stor_Bulk_transport;
+ ss->transport_reset = usb_stor_Bulk_reset;
+ ss->max_lun = 3;
+ break;
+
#ifdef CONFIG_USB_STORAGE_HP8200e
case US_PR_SCM_ATAPI:
ss->transport_name = "SCM/ATAPI";
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