From 7fd5aecc5d32882f8e29b14370e9ce2520e7e56f Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Sun, 27 Aug 2006 01:23:33 -0700 Subject: [PATCH] mtd corruption fix Read the return value before we release the nand device otherwise the value can become corrupted by another user of chip->ops, ultimately resulting in filesystem corruption. Signed-off-by: Richard Purdie Cc: David Woodhouse Acked-by: Josh Boyer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mtd/nand/nand_base.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 62b861304e0..c8cbc00243f 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1093,9 +1093,10 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, ret = nand_do_read_ops(mtd, from, &chip->ops); + *retlen = chip->ops.retlen; + nand_release_device(mtd); - *retlen = chip->ops.retlen; return ret; } @@ -1691,9 +1692,10 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, ret = nand_do_write_ops(mtd, to, &chip->ops); + *retlen = chip->ops.retlen; + nand_release_device(mtd); - *retlen = chip->ops.retlen; return ret; } -- cgit v1.2.3 From fb8d81e47783f9198f3d6248bd4c0d16a1d5424e Mon Sep 17 00:00:00 2001 From: Jonathan McDowell Date: Sun, 27 Aug 2006 01:23:41 -0700 Subject: [PATCH] MTD NAND: Fix ams-delta after core conversion The recent hwctrl core conversion for MTD NAND devices broke the Amstrad Delta driver. This fixes it up and uses the existing control line defines rather than unclear magic numbers. Signed-off-by: Jonathan McDowell Acked-by: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mtd/nand/ams-delta.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/ams-delta.c b/drivers/mtd/nand/ams-delta.c index d7897dc6b3c..a0ba07c36ee 100644 --- a/drivers/mtd/nand/ams-delta.c +++ b/drivers/mtd/nand/ams-delta.c @@ -130,11 +130,13 @@ static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd, if (ctrl & NAND_CTRL_CHANGE) { unsigned long bits; - bits = (~ctrl & NAND_NCE) << 2; - bits |= (ctrl & NAND_CLE) << 7; - bits |= (ctrl & NAND_ALE) << 6; + bits = (~ctrl & NAND_NCE) ? AMS_DELTA_LATCH2_NAND_NCE : 0; + bits |= (ctrl & NAND_CLE) ? AMS_DELTA_LATCH2_NAND_CLE : 0; + bits |= (ctrl & NAND_ALE) ? AMS_DELTA_LATCH2_NAND_ALE : 0; - ams_delta_latch2_write(0xC2, bits); + ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_CLE | + AMS_DELTA_LATCH2_NAND_ALE | + AMS_DELTA_LATCH2_NAND_NCE, bits); } if (cmd != NAND_CMD_NONE) -- cgit v1.2.3