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authorLuis R. Rodriguez <mcgrof@kernel.org>2017-01-23 19:11:10 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-25 13:52:34 +0300
commit061132d2b9c9504a9f314dcd73f6483a7d8cd1e8 (patch)
tree0fe6e0c7820ae1d7619c0a8dc1e3fb6ff53c5a6d
parenteb67bc3ffd1796e198fc923da2ba15beb7965529 (diff)
downloadlinux-061132d2b9c9504a9f314dcd73f6483a7d8cd1e8.tar.xz
test_firmware: add test custom fallback trigger
We have no custom fallback mechanism test interface. Provide one. This tests both the custom fallback mechanism and cancelling the it. Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--lib/test_firmware.c45
-rwxr-xr-xtools/testing/selftests/firmware/fw_fallback.sh68
2 files changed, 113 insertions, 0 deletions
diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index 38cc188c4d3c..09371b0a9baf 100644
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -126,11 +126,56 @@ out:
}
static DEVICE_ATTR_WO(trigger_async_request);
+static ssize_t trigger_custom_fallback_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+ char *name;
+
+ name = kstrndup(buf, count, GFP_KERNEL);
+ if (!name)
+ return -ENOSPC;
+
+ pr_info("loading '%s' using custom fallback mechanism\n", name);
+
+ mutex_lock(&test_fw_mutex);
+ release_firmware(test_firmware);
+ test_firmware = NULL;
+ rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG, name,
+ dev, GFP_KERNEL, NULL,
+ trigger_async_request_cb);
+ if (rc) {
+ pr_info("async load of '%s' failed: %d\n", name, rc);
+ kfree(name);
+ goto out;
+ }
+ /* Free 'name' ASAP, to test for race conditions */
+ kfree(name);
+
+ wait_for_completion(&async_fw_done);
+
+ if (test_firmware) {
+ pr_info("loaded: %zu\n", test_firmware->size);
+ rc = count;
+ } else {
+ pr_err("failed to async load firmware\n");
+ rc = -ENODEV;
+ }
+
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_custom_fallback);
+
#define TEST_FW_DEV_ATTR(name) &dev_attr_##name.attr
static struct attribute *test_dev_attrs[] = {
TEST_FW_DEV_ATTR(trigger_request),
TEST_FW_DEV_ATTR(trigger_async_request),
+ TEST_FW_DEV_ATTR(trigger_custom_fallback),
NULL,
};
diff --git a/tools/testing/selftests/firmware/fw_fallback.sh b/tools/testing/selftests/firmware/fw_fallback.sh
index 68e27e5f27a4..2e4c22d5abf7 100755
--- a/tools/testing/selftests/firmware/fw_fallback.sh
+++ b/tools/testing/selftests/firmware/fw_fallback.sh
@@ -83,6 +83,58 @@ load_fw_cancel()
wait
}
+load_fw_custom()
+{
+ local name="$1"
+ local file="$2"
+
+ echo -n "$name" >"$DIR"/trigger_custom_fallback 2>/dev/null &
+
+ # Give kernel a chance to react.
+ local timeout=10
+ while [ ! -e "$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"/"$name"/loading
+ cat "$file" >"$DIR"/"$name"/data
+ echo 0 >"$DIR"/"$name"/loading
+
+ # Wait for request to finish.
+ wait
+}
+
+
+load_fw_custom_cancel()
+{
+ local name="$1"
+ local file="$2"
+
+ echo -n "$name" >"$DIR"/trigger_custom_fallback 2>/dev/null &
+
+ # Give kernel a chance to react.
+ local timeout=10
+ while [ ! -e "$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. :)
@@ -153,4 +205,20 @@ else
echo "$0: cancelling fallback mechanism works"
fi
+load_fw_custom "$NAME" "$FW"
+if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then
+ echo "$0: firmware was not loaded" >&2
+ exit 1
+else
+ echo "$0: custom fallback loading mechanism works"
+fi
+
+load_fw_custom_cancel "nope-$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 custom fallback mechanism works"
+fi
+
exit 0