diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_firmware.c | 45 |
1 files changed, 45 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, }; |