Solved - Buffer I/O error - chip access timings in 2.6.13?

[Olav Kongas]

It turned out that the flash chip was in the 'read' mode, 
while it was expected to be in the 'read status' mode. Hence 
the errors described in the parent e-mail. The following 
patch cures the problem for me. I hope the patch is suitable 
for submission to mainline. 

Olav


--- linux-2.6.14-rc4-or/drivers/mtd/chips/cfi_cmdset_0001.c	2005-10-11 04:19:19.000000000 +0300
+++ linux-2.6.14-rc4-flash/drivers/mtd/chips/cfi_cmdset_0001.c	2005-10-24 23:52:12.000000000 +0300
@@ -643,6 +643,9 @@ static int get_chip(struct map_info *map
 	switch (chip->state) {
 
 	case FL_STATUS:
+		/* Some chips (e.g. Sharp's LHF64F12) need to be
+		   explicitly set to 'status read' mode. */
+		map_write(map, CMD(0x70), adr);
 		for (;;) {
 			status = map_read(map, adr);
 			if (map_word_andequal(map, status, status_OK, status_OK))