Bug#891036: libusbip: error: port number exceeds 128

From	Gergely Risko <risko@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#891036: libusbip: error: port number exceeds 128
Date	2018-05-22 18:20 +0200
Message-ID	<vSib0-pl-3@gated-at.bofh.it> (permalink)
References	<vlH06-1O8-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Dear Ben,

The issue is definitely not fixed by this in 4.14.17-1:

  * usbip: Reduce USBIP_VHCI_HC_PORTS to 15, the maximum allowed for SuperSpeed
    hubs (Closes: #878866)

On the other hand simply increasing the limit in the userspace library
from 128 to 256 fixes the issue on my computer running
linux-image-4.16.0-1-amd64 (4.16.5-1).  Please note that the patch is
only a userspace change in the usbip package, not a kernel change.

I tested the change without even rebuilding the package, just building
the userspace usbip executable with autogen+configure+make in the
tools/usb/usbip subdirectory and I managed to pass through a usb
device.  No oopses, no problems, device is working as expected.

Cheers,
Gergely

--- linux-4.16.5.orig/tools/usb/usbip/libsrc/vhci_driver.h
+++ linux-4.16.5/tools/usb/usbip/libsrc/vhci_driver.h
@@ -13,7 +13,7 @@
 
 #define USBIP_VHCI_BUS_TYPE "platform"
 #define USBIP_VHCI_DEVICE_NAME "vhci_hcd.0"
-#define MAXNPORT 128
+#define MAXNPORT 256
 
 enum hub_speed {
 	HUB_SPEED_HIGH = 0,

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Thread

Bug#891036: libusbip: error: port number exceeds 128 wzab <wzab@ise.pw.edu.pl> - 2018-02-21 19:10 +0100
  Bug#891036: More details - the problem is associated with the vhci-hcd driver. wzab <wzab@ise.pw.edu.pl> - 2018-02-21 20:00 +0100
  Bug#891036: Problem occurs in 4.13 and 4.14, but not in 4.12 "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-21 20:30 +0100
  Bug#891036: Problem still persists in kernel 4.15 "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-21 21:10 +0100
  Bug#891036: Even after updating "usbip" to usbip_2.0+4.15.4-1_amd64.deb problem remains "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-21 21:20 +0100
  Bug#891036: The problem is related to the number of ports created in vhci_hcd.0 Wojtek Zabolotny <W.Zabolotny@elka.pw.edu.pl> - 2018-02-22 14:40 +0100
    Bug#891036: The problem is related to the number of ports created in vhci_hcd.0 "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-22 23:20 +0100
      Bug#891036: The problem is related to the number of ports created in vhci_hcd.0 "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-22 23:50 +0100
        Bug#891036: Workaround found, the problem is with Debian configuration of kernel "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-23 01:10 +0100
        Bug#891036: Proposal - how to make usbip more resistant to misconfiguration "wzabolot@elektron.elka.pw.edu.pl" <wzabolot@elektron.elka.pw.edu.pl> - 2018-02-23 02:10 +0100
  Bug#891036: libusbip: error: port number exceeds 128 Gergely Risko <risko@debian.org> - 2018-05-22 18:20 +0200

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