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authorPaul Parsons <lost.distance@yahoo.com>2012-03-07 14:11:16 +0000
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-03-27 00:52:23 +0100
commite7d9377e0440c25805dcc5b0af189a87beb69f5e (patch)
tree4c498a6a946d1f45f143ff62de26414d4437df5f /drivers/mtd
parent85e5b2f2986310f2f75069c360669f6ce8e2ceb9 (diff)
downloadop-kernel-dev-e7d9377e0440c25805dcc5b0af189a87beb69f5e.zip
op-kernel-dev-e7d9377e0440c25805dcc5b0af189a87beb69f5e.tar.gz
mtd: chips: cfi_cmdset_0002: Match ENABLE_VPP()/DISABLE_VPP() calls
This patch is part of a set which fixes unnecessary flash erase and write errors resulting from the MTD CFI driver turning off vpp while an erase is in progress. This patch ensures that only those flash operations which call ENABLE_VPP() can then call DISABLE_VPP(). Other operations should never call DISABLE_VPP(). Signed-off-by: Paul Parsons <lost.distance@yahoo.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index c1d4624..d02592e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -774,8 +774,6 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad
case FL_READY:
case FL_STATUS:
- /* We should really make set_vpp() count, rather than doing this */
- DISABLE_VPP(map);
break;
default:
printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate);
@@ -1229,6 +1227,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
xip_enable(map, chip, adr);
op_done:
chip->state = FL_READY;
+ DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
@@ -1467,6 +1466,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
ret = -EIO;
op_done:
chip->state = FL_READY;
+ DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
@@ -1868,6 +1868,7 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
chip->state = FL_READY;
xip_enable(map, chip, adr);
+ DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
@@ -1958,6 +1959,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
}
chip->state = FL_READY;
+ DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
return ret;
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