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Commit afb999cd authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by Greg Kroah-Hartman
Browse files

tools: firmware: check for distro fallback udev cancel rule 



Some distributions (Debian, OpenSUSE) have a udev rule in place to cancel
all fallback mechanism uevents immediately. This would obviously
make it hard to test against the fallback mechanism test interface,
so we need to check for this.

Signed-off-by: default avatarLuis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 083a93b0

tools/testing/selftests/firmware/fw_userhelper.sh

+26 −2
Original line number Diff line number Diff line
@@ -64,9 +64,33 @@ trap "test_finish" EXIT 
echo "ABCD0123" >"$FW"

NAME=$(basename "$FW")



DEVPATH="$DIR"/"nope-$NAME"/loading



# Test failure when doing nothing (timeout works).

echo 1 >/sys/class/firmware/timeout

echo -n "$NAME" >"$DIR"/trigger_request

echo -n 2 >/sys/class/firmware/timeout

echo -n "nope-$NAME" >"$DIR"/trigger_request 2>/dev/null &



# Give the kernel some time to load the loading file, must be less

# than the timeout above.

sleep 1

if [ ! -f $DEVPATH ]; then

	echo "$0: fallback mechanism immediately cancelled"

	echo ""

	echo "The file never appeared: $DEVPATH"

	echo ""

	echo "This might be a distribution udev rule setup by your distribution"

	echo "to immediately cancel all fallback requests, this must be"

	echo "removed before running these tests. To confirm look for"

	echo "a firmware rule like /lib/udev/rules.d/50-firmware.rules"

	echo "and see if you have something like this:"

	echo ""

	echo "SUBSYSTEM==\"firmware\", ACTION==\"add\", ATTR{loading}=\"-1\""

	echo ""

	echo "If you do remove this file or comment out this line before"

	echo "proceeding with these tests."

	exit 1

fi



if diff -q "$FW" /dev/test_firmware >/dev/null ; then

	echo "$0: firmware was not expected to match" >&2

	exit 1