[Bug 790145] Re: kvm husb: ctrl buffer too small

[Attb2]

I've downloaded RH bugfix and latest Ubuntu source code.
https://bugzilla.redhat.com/attachment.cgi?id=441018

https://launchpad.net/ubuntu/lucid/+source/qemu-kvm
qemu-kvm_0.12.3+noroms.orig.tar.gz 

usb-linux.c source file is exactly the same, so this patch will fix the bug. :-)
Tomorrow morning I'll test it.

commit fd7a446f162768c044b3bf3844f7605eeef351af
Author: Christian Krause <chkr at plauener.de>
Date:   Sun Jan 24 17:34:52 2010 +0100

    usb-linux: increase buffer for USB control requests
    
    The WLAN USB stick ZyXEL NWD271N (0586:3417) uses very large
    usb control transfers of more than 2048 bytes which won't fit
    into the buffer of the ctrl_struct. This results in an error message
    "husb: ctrl buffer too small" and a non-working device.
    Increasing the buffer size to 8192 seems to be a safe choice.
    
    Signed-off-by: Christian Krause <chkr at plauener.de>
    Signed-off-by: Aurelien Jarno <aurelien at aurel32.net>

diff --git a/usb-linux.c b/usb-linux.c
index ba8facf..122cdbf 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -113,7 +113,7 @@ struct ctrl_struct {
     uint16_t offset;
     uint8_t  state;
     struct   usb_ctrlrequest req;
-    uint8_t  buffer[2048];
+    uint8_t  buffer[8192];
 };
 
 struct USBAutoFilter {

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https://bugs.launchpad.net/bugs/790145

Title:
  kvm husb: ctrl buffer too small