From mboxrd@z Thu Jan  1 00:00:00 1970
From: MALET JL <malet.jean-luc@laposte.net>
Date: Tue, 23 Dec 2003 16:38:13 +0000
Subject: Re: pci.rc : coldplug fix
Message-Id: <marc-linux-hotplug-107219737329333@msgid-missing>
List-Id: <linux-hotplug.vger.kernel.org>
References: <marc-linux-hotplug-107219486026474@msgid-missing>
In-Reply-To: <marc-linux-hotplug-107219486026474@msgid-missing>
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To: linux-hotplug@vger.kernel.org

MALET JL a =C3=A9crit :

> hello,
> this is the first time I write here :)
> I  discovered hotplog recently because devfs is no longer a "standard"
> the first thing I tried is coldplug and..... nothing worked..... I=20
> looked into the sources and find the problem in pci.rc
> the pci.rc snapshot included here solve this issue and now coldplug=20
> work on my pc.
> It has the advantage of using only /proc and awk to generate the=20
> pciID/vendorID
> best regards
>
>------------------------------------------------------------------------
>
>[....]
>
>pci_boot_events ()
>{
>    #
>    # FIXME on 2.5, /sys/bus/pci/devices gives some of this
>    # information, and more can be gotten with 'lspci'.
>    # don't expect pcimodules to exist!!
>    #
>    LISTER=3D`type -p pcimodules`
>    if [ "$LISTER" =3D "" -o ! -f /proc/bus/pci/devices -o ! -x pci.agent =
]; then
>	    echo $"** can't synthesize pci hotplug events"
>	    return
>    fi
>
>    # make sure the pci agent will run
>    export ACTION=ADd
>    export PCI_CLASS=3D0
>    export PCI_ID=3D0:0
>    export PCI_SLOT=3D0:0.0
>    export PCI_SUBSYS_ID=3D0:0
>
>    # these notifications will be handled by pcimodules
>    gawk -F' ' '{printf("%s:%s\n",toupper(substr($2,0,4)), toupper(substr(=
$2,5,4)) )}' /proc/bus/pci/devices |
>    while read PCI_ID; do
>	/sbin/hotplug pci
>    done
>}
>
>[....]
> =20
>
now I see another modification that can reduce the code :

pci_boot_events ()
{
    # make sure the pci agent will run
    export ACTION=ADd
    export PCI_CLASS=3D0
    export PCI_ID=3D0:0
    export PCI_SLOT=3D0:0.0
    export PCI_SUBSYS_ID=3D0:0

    # these notifications will be handled by pcimodules
    gawk -F' ' '{printf("%s:%s\n",toupper(substr($2,0,4)), toupper(substr($=
2,5,4)) )}' /proc/bus/pci/devices |
    while read PCI_ID; do
	/sbin/hotplug pci
    done
}

notice the fact that =20
1) sysfs isn't needed : use of /proc/bus/*
2) lspci isn't needed too : same information can be gathered in /proc/bus/p=
ci/devices
3) pcimodules is furthermore not required





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