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test_firmware: add test custom fallback trigger

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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>
This commit is contained in:
Luis R. Rodriguez 2017-01-23 08:11:10 -08:00 • committed by Greg Kroah-Hartman
parent eb67bc3ffd
commit 061132d2b9
2 changed files with 113 additions and 0 deletions
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45
lib/test_firmware.c
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@ -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,
};