ihex: fix unused return value compiler warning

Fix unusued return value compiler warnings due to unchecked write() calls.

[[e-mail]: correctly handle short writes]
Signed-off-by: Chris Ruffin <[e-mail]>
Cc: Mark Brown <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

firmware/ihex2fw.c

···
 	if (process_ihex(data, st.st_size))
 		return 1;
 
-	output_records(outfd);
-	return 0;
+	return output_records(outfd);
 }
 
 static int process_ihex(uint8_t *data, ssize_t size)
···
 
 		p->addr = htonl(p->addr);
 		p->len = htons(p->len);
-		write(outfd, &p->addr, writelen);
+		if (write(outfd, &p->addr, writelen) != writelen)
+			return 1;
 		p = p->next;
 	}
 	/* EOF record is zero length, since we don't bother to represent
 	   the type field in the binary version */
-	write(outfd, zeroes, 6);
+	if (write(outfd, zeroes, 6) != 6)
+		return 1;
 	return 0;
 }