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[MTD,CHIPS] cfi_cmdset_0001.c: put chip into read-array mode after unlocking

Message ID 1302923589-19226-1-git-send-email-vapier@gentoo.org
State New, archived
Headers show

Commit Message

Mike Frysinger April 16, 2011, 3:13 a.m. UTC 
From: Graf Yang <graf.yang@analog.com>

We should try and keep the flash in the default read-array mode when
possible so that we are much more likely to properly recover from
unexpected reboot events (such as watchdog expiring).  If we only unlock
the flash, it can stay in that state for a while, so put it into
read-array mode after successful unlocking.

URL: http://blackfin.uclinux.org/gf/tracker/4887
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 drivers/mtd/chips/cfi_cmdset_0001.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
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Patch

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 4aaa88f..abe2571 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -2089,6 +2089,11 @@  static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip
 		goto out;
 	}
 
+	if (chip->state == FL_STATUS) {
+		/* it goes ok, put chip into array mode */
+		map_write(map, CMD(0xff), adr);
+		chip->state = FL_READY;
+	}
 	xip_enable(map, chip, adr);
 out:	put_chip(map, chip, adr);
 	mutex_unlock(&chip->mutex);