add stmac read mac form eeprom

hc

2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/ihex.h
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@@ -18,15 +18,27 @@
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 struct ihex_binrec {
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 	__be32 addr;
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 	__be16 len;
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-	uint8_t data[0];
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+	uint8_t data[];
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 } __attribute__((packed));
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+
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+static inline uint16_t ihex_binrec_size(const struct ihex_binrec *p)
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+{
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+	return be16_to_cpu(p->len) + sizeof(*p);
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+}
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28
 
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 /* Find the next record, taking into account the 4-byte alignment */
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 static inline const struct ihex_binrec *
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+__ihex_next_binrec(const struct ihex_binrec *rec)
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+{
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+	const void *p = rec;
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+
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+	return p + ALIGN(ihex_binrec_size(rec), 4);
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+}
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+
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+static inline const struct ihex_binrec *
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 ihex_next_binrec(const struct ihex_binrec *rec)
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 {
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-	int next = ((be16_to_cpu(rec->len) + 5) & ~3) - 2;
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-	rec = (void *)&rec->data[next];
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+	rec = __ihex_next_binrec(rec);
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42
 
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 	return be16_to_cpu(rec->len) ? rec : NULL;
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 }
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@@ -34,18 +46,15 @@
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 /* Check that ihex_next_binrec() won't take us off the end of the image... */
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 static inline int ihex_validate_fw(const struct firmware *fw)
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 {
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-	const struct ihex_binrec *rec;
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-	size_t ofs = 0;
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+	const struct ihex_binrec *end, *rec;
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-	while (ofs <= fw->size - sizeof(*rec)) {
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-		rec = (void *)&fw->data[ofs];
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+	rec = (const void *)fw->data;
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+	end = (const void *)&fw->data[fw->size - sizeof(*end)];
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+	for (; rec <= end; rec = __ihex_next_binrec(rec)) {
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 		/* Zero length marks end of records */
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-		if (!be16_to_cpu(rec->len))
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+		if (rec == end && !be16_to_cpu(rec->len))
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 			return 0;
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-
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-		/* Point to next record... */
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-		ofs += (sizeof(*rec) + be16_to_cpu(rec->len) + 3) & ~3;
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 	}
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 	return -EINVAL;
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 }