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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>
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@ -126,11 +126,56 @@ static ssize_t trigger_async_request_store(struct device *dev,
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}
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static DEVICE_ATTR_WO(trigger_async_request);
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static ssize_t trigger_custom_fallback_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int rc;
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char *name;
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name = kstrndup(buf, count, GFP_KERNEL);
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if (!name)
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return -ENOSPC;
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pr_info("loading '%s' using custom fallback mechanism\n", name);
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mutex_lock(&test_fw_mutex);
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release_firmware(test_firmware);
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test_firmware = NULL;
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rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG, name,
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dev, GFP_KERNEL, NULL,
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trigger_async_request_cb);
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if (rc) {
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pr_info("async load of '%s' failed: %d\n", name, rc);
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kfree(name);
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goto out;
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}
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/* Free 'name' ASAP, to test for race conditions */
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kfree(name);
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wait_for_completion(&async_fw_done);
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if (test_firmware) {
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pr_info("loaded: %zu\n", test_firmware->size);
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rc = count;
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} else {
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pr_err("failed to async load firmware\n");
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rc = -ENODEV;
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}
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out:
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mutex_unlock(&test_fw_mutex);
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return rc;
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}
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static DEVICE_ATTR_WO(trigger_custom_fallback);
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#define TEST_FW_DEV_ATTR(name) &dev_attr_##name.attr
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static struct attribute *test_dev_attrs[] = {
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TEST_FW_DEV_ATTR(trigger_request),
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TEST_FW_DEV_ATTR(trigger_async_request),
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TEST_FW_DEV_ATTR(trigger_custom_fallback),
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NULL,
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};
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@ -83,6 +83,58 @@ load_fw_cancel()
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wait
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}
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load_fw_custom()
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{
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local name="$1"
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local file="$2"
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echo -n "$name" >"$DIR"/trigger_custom_fallback 2>/dev/null &
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# Give kernel a chance to react.
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local timeout=10
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while [ ! -e "$DIR"/"$name"/loading ]; do
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sleep 0.1
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timeout=$(( $timeout - 1 ))
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if [ "$timeout" -eq 0 ]; then
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echo "$0: firmware interface never appeared" >&2
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exit 1
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fi
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done
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echo 1 >"$DIR"/"$name"/loading
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cat "$file" >"$DIR"/"$name"/data
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echo 0 >"$DIR"/"$name"/loading
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# Wait for request to finish.
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wait
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}
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load_fw_custom_cancel()
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{
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local name="$1"
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local file="$2"
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echo -n "$name" >"$DIR"/trigger_custom_fallback 2>/dev/null &
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# Give kernel a chance to react.
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local timeout=10
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while [ ! -e "$DIR"/"$name"/loading ]; do
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sleep 0.1
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timeout=$(( $timeout - 1 ))
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if [ "$timeout" -eq 0 ]; then
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echo "$0: firmware interface never appeared" >&2
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exit 1
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fi
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done
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echo -1 >"$DIR"/"$name"/loading
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# Wait for request to finish.
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wait
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}
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trap "test_finish" EXIT
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# This is an unlikely real-world firmware content. :)
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@ -153,4 +205,20 @@ else
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echo "$0: cancelling fallback mechanism works"
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fi
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load_fw_custom "$NAME" "$FW"
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if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then
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echo "$0: firmware was not loaded" >&2
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exit 1
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else
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echo "$0: custom fallback loading mechanism works"
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fi
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load_fw_custom_cancel "nope-$NAME" "$FW"
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if diff -q "$FW" /dev/test_firmware >/dev/null ; then
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echo "$0: firmware was expected to be cancelled" >&2
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exit 1
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else
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echo "$0: cancelling custom fallback mechanism works"
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fi
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exit 0
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