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test: firmware_class: report errors properly on failure

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request_firmware() failures currently won't get reported at all (the
error code is discarded). What's more, we get confusing messages, like:

    # echo -n notafile > /sys/devices/virtual/misc/test_firmware/trigger_request
    [ 8280.311856] test_firmware: loading 'notafile'
    [ 8280.317042] test_firmware: load of 'notafile' failed: -2
    [ 8280.322445] test_firmware: loaded: 0
    # echo $?
    0

Report the failures via write() errors, and don't say we "loaded"
anything.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Brian Norris 2015-12-09 14:50:25 -08:00 committed by Shuah Khan
parent b5bb6d3068
commit 47e0bbb7fa
1 changed files with 8 additions and 3 deletions
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11
lib/test_firmware.c
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@ -65,14 +65,19 @@ static ssize_t trigger_request_store(struct device *dev,
release_firmware(test_firmware);
test_firmware = NULL;
rc = request_firmware(&test_firmware, name, dev);
if (rc)
if (rc) {
pr_info("load of '%s' failed: %d\n", name, rc);
pr_info("loaded: %zu\n", test_firmware ? test_firmware->size : 0);
goto out;
}
pr_info("loaded: %zu\n", test_firmware->size);
rc = count;
out:
mutex_unlock(&test_fw_mutex);
kfree(name);
return count;
return rc;
}
static DEVICE_ATTR_WO(trigger_request);