ihex: request_ihex_firmware() function to load and validate firmware
Provide a helper to load the file and validate it in one call, to simplify error handling in the drivers which are going to use it. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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@ -9,6 +9,7 @@
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#include <linux/types.h>
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#include <linux/firmware.h>
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#include <linux/device.h>
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/* Intel HEX files actually limit the length to 256 bytes, but we have
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drivers which would benefit from using separate records which are
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@ -47,4 +48,27 @@ static inline int ihex_validate_fw(const struct firmware *fw)
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}
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return -EINVAL;
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}
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/* Request firmware and validate it so that we can trust we won't
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* run off the end while reading records... */
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static inline int request_ihex_firmware(const struct firmware **fw,
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const char *fw_name,
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struct device *dev)
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{
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const struct firmware *lfw;
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int ret;
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ret = request_firmware(&lfw, fw_name, dev);
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if (ret)
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return ret;
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ret = ihex_validate_fw(lfw);
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if (ret) {
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dev_err(dev, "Firmware \"%s\" not valid IHEX records\n",
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fw_name);
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release_firmware(lfw);
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return ret;
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}
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*fw = lfw;
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return 0;
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}
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#endif /* __LINUX_IHEX_H__ */
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