tools: firmware: add fallback cancelation testing

Add a test case for cancelling the sync fallback mechanism.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/tools/testing/selftests/firmware/fw_fallback.sh b/tools/testing/selftests/firmware/fw_fallback.sh
index f694afb7d12db2f35b672f1f13f67cfe91fa102b..68e27e5f27a42be16a27b77818b371d8c2cd42de 100755 (executable)
--- a/tools/testing/selftests/firmware/fw_fallback.sh
+++ b/tools/testing/selftests/firmware/fw_fallback.sh
@@ -58,6 +58,31 @@ load_fw()
        wait
 }
 
+load_fw_cancel()
+{
+       local name="$1"
+       local file="$2"
+
+       # This will block until our load (below) has finished.
+       echo -n "$name" >"$DIR"/trigger_request 2>/dev/null &
+
+       # Give kernel a chance to react.
+       local timeout=10
+       while [ ! -e "$DIR"/"$name"/loading ]; do
+               sleep 0.1
+               timeout=$(( $timeout - 1 ))
+               if [ "$timeout" -eq 0 ]; then
+                       echo "$0: firmware interface never appeared" >&2
+                       exit 1
+               fi
+       done
+
+       echo -1 >"$DIR"/"$name"/loading
+
+       # Wait for request to finish.
+       wait
+}
+
 trap "test_finish" EXIT
 
 # This is an unlikely real-world firmware content. :)
@@ -118,7 +143,14 @@ if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then
        exit 1
 else
        echo "$0: fallback mechanism works"
+fi
 
+load_fw_cancel "nope-$NAME" "$FW"
+if diff -q "$FW" /dev/test_firmware >/dev/null ; then
+       echo "$0: firmware was expected to be cancelled" >&2
+       exit 1
+else
+       echo "$0: cancelling fallback mechanism works"
 fi
 
 exit 0