Re: Problems with USB

From: Petr.Titera@whitesoft.cz
Date: Mon Jan 13 2003 - 03:13:44 EST

Hello,

     yes it look that this patch can work. But who send that signal. I
tried to hack kernel to print signal number and it looks, that khubd gets
SIGHUP.

Petr Titera
petr.titera@whitesoft.cz

                                                                                            
                    Greg KH
                    <greg@kroah.co To: Petr.Titera@whitesoft.cz
                    m> cc: linux-kernel@vger.kernel.org
                                         Fax to:
                    13.01.2003 Subject: Re: Problems with USB
                    06:55
                                                                                            
                                                                                            

On Sun, Jan 12, 2003 at 09:44:42PM +0100, Petr.Titera@whitesoft.cz wrote:
> Hello all,
>
> I have problems with USB in recent kernels (tested on 2.5.56) and
> RedHat 8.0. Right after end of script '/etc/rc.d/rc.sysinit' and before
> script '/etc/rc.d/rc' which runs after USB daemon khubd gets some signal
> and ends. From this point USB does not work as as system does not get any
> plug events. If I disable USB at startup and load modules later,
everything
> works.

Can you try this patch that I just added to the USB tree? It seems to
work for me.

thanks,

greg k-h

# USB: Fix from Jeff and Pete to keep khubd from being able to be killed
# by a signal

diff -Nru a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
--- a/drivers/usb/core/hub.c Sun Jan 12 22:03:13 2003
+++ b/drivers/usb/core/hub.c Sun Jan 12 22:03:13 2003
@@ -1085,6 +1085,12 @@

     daemonize();

+ /* keep others from killing us */
+ spin_lock_irq(&current->sig->siglock);
+ sigemptyset(&current->blocked);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sig->siglock);
+
     /* Setup a nice name */
     strcpy(current->comm, "khubd");

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