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Subject[PATCH 4.4 45/56] selftests: firmware: add empty string and async tests
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4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Brian Norris <computersforpeace@gmail.com>

commit 1b1fe542b6f010cf6bc7e1c92805e1c0e133e007 upstream.

Now that we've added a 'trigger_async_request' knob to test the
request_firmware_nowait() API, let's use it. Also add tests for the
empty ("") string, since there have been a couple errors in that
handling already.

Since we now have real ways that the sysfs write might fail, let's add
the appropriate check on the 'echo' lines too.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
[AmitP: Dropped the async trigger testing parts from original commit]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/testing/selftests/firmware/fw_filesystem.sh | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/firmware/fw_filesystem.sh
+++ b/tools/testing/selftests/firmware/fw_filesystem.sh
@@ -48,8 +48,16 @@ echo "ABCD0123" >"$FW"

NAME=$(basename "$FW")

+if printf '\000' >"$DIR"/trigger_request; then
+ echo "$0: empty filename should not succeed" >&2
+ exit 1
+fi
+
# Request a firmware that doesn't exist, it should fail.
-echo -n "nope-$NAME" >"$DIR"/trigger_request
+if echo -n "nope-$NAME" >"$DIR"/trigger_request; then
+ echo "$0: firmware shouldn't have loaded" >&2
+ exit 1
+fi
if diff -q "$FW" /dev/test_firmware >/dev/null ; then
echo "$0: firmware was not expected to match" >&2
exit 1

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