diff -u -x '*.d' -x '*.o' ../clean/flashrom-0.9.9/spi.c flashrom-0.9.9/spi.c
--- ../clean/flashrom-0.9.9/spi.c	2014-07-20 00:03:29.000000000 +0200
+++ flashrom-0.9.9/spi.c	2017-04-19 00:04:25.138374544 +0200
@@ -100,6 +100,20 @@
 	return spi_write_chunked(flash, buf, start, len, max_data);
 }
 
+static int my_ffs(int x)
+{
+	int rc = 0;
+	while(x)
+	{
+		if (x & 1)
+			return rc;
+		rc++;
+		x >>= 1;
+	}
+
+	return 0;
+}
+
 int spi_chip_read(struct flashctx *flash, uint8_t *buf, unsigned int start,
 		  unsigned int len)
 {
@@ -119,7 +133,7 @@
 	/* Check if alignment is native (at least the largest power of two which
 	 * is a factor of the mapped size of the chip).
 	 */
-	if (ffs(flash->chip->total_size * 1024) > (ffs(addrbase) ? : 33)) {
+	if (my_ffs(flash->chip->total_size * 1024) > (my_ffs(addrbase) ? : 33)) {
 		msg_perr("Flash chip is not aligned natively in the allowed "
 			 "access window.\n");
 		msg_perr("Read will probably return garbage.\n");