On Thu, Oct 05, 2006 at 06:05:46PM +0200, Stefan Seyfried wrote:
> Hi.
>
> Sometimes it is usefull to unload a complete stack of modules.
> This patch implements that:
>
> Index: pm/functions
> ===================================================================
> RCS file: /cvs/pm-utils/pm-utils/pm/functions,v
> retrieving revision 1.20
> diff -u -p -r1.20 functions
> --- pm/functions 28 Sep 2006 21:25:36 -0000 1.20
> +++ pm/functions 5 Oct 2006 16:00:39 -0000
> @@ -113,13 +113,46 @@ pm_main()
> return 0
> }
>
> +# this recursively unloads the given modules and all that depend on it
> +# first parameter is the module to be unloaded
> modunload()
> {
> - /sbin/lsmod 2>/dev/null | grep -q "$1"
> - if [ "$?" == "0" ]; then
> - echo "export ${1}_MODULE_LOAD=yes" >> /var/run/pm-suspend
> - /sbin/modprobe -r "$1" >/dev/null 2>&1
> - fi
> + local MOD D C USED MODS I
> + local UNL=$1 RET=1
> + # RET is the return code. If at least one module was unloaded, return 0.
> + # if the module was not loaded, also return 0 since this is no
> error.
> + # if no module was unloaded successfully, return 1
> + while read MOD D C USED D; do
> + [ "$MOD" != "$UNL" ] && continue
> + if [ "$USED" == "-" ]; then
> + if [ $C -eq 0 ]; then
> + if rmmod $UNL; then
> + echo "export ${UNL}_MODULE_LOAD=yes" >>
> /var/run/pm-suspend
> + RET=0
> + else
> + echo "## could not unload '$UNL', usage
> count was 0" \
> + >> /var/run/pm-suspend
> + fi
> + else
> + echo "## could not unload '$UNL', usage count:
> $C" >> \
> + /var/run/pm-suspend
> + fi
> + else
> + USED=${USED//,/ }
> + MODS=($USED)
> + # it seems slightly more likely to rmmod in one pass,
> if we try backwards.
> + for I in `seq [EMAIL PROTECTED] -1 0`; do
> + MOD=${MODS[$I]}
> + modunload $MOD && RET=0
> + done
> + # if we unloaded at least one module, then let's try
> again!
> + [ $RET -eq 0 ] && modunload $UNL
> + RET=$?
> + fi
> + return $RET
> + done < /proc/modules
> + # if we came this far, there was nothing to do, the module is no longer
> loaded.
> + return 0
> }
>
> modreload()
ok, this might actually unload more modules than it will be reloading during
resume. How about:
if rmmod $UNL; then
echo "export RESUME_MODULES=\"$UNL \$RESUME_MODULES\"" >>
/var/pm/pm-suspend
RET=0
else
.....
and then use RESUME_MODULES in 50modules like this:
resume_modules()
{
for x in $RESUME_MODULES; do
modprobe $x > /dev/null 2>&1
done
}
--
Stefan Seyfried
QA / R&D Team Mobile Devices | "Any ideas, John?"
SUSE LINUX Products GmbH, Nürnberg | "Well, surrounding them's out."
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