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| author | Brent Taylor <motobud@gmail.com> | 2017-10-30 22:32:45 -0500 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-10-31 16:25:43 +0100 |
| commit | 30863e38ebeb500a31cecee8096fb5002677dd9b (patch) | |
| tree | f7158b29ff5af570e4ffab36c0ba445cfedb1d58 /drivers/mtd | |
| parent | 1d2fcdcf33339c7c8016243de0f7f31cf6845e8d (diff) | |
| download | linux-30863e38ebeb500a31cecee8096fb5002677dd9b.tar.gz linux-30863e38ebeb500a31cecee8096fb5002677dd9b.tar.bz2 linux-30863e38ebeb500a31cecee8096fb5002677dd9b.zip | |
mtd: nand: Fix writing mtdoops to nand flash.
When mtdoops calls mtd_panic_write(), it eventually calls
panic_nand_write() in nand_base.c. In order to properly wait for the
nand chip to be ready in panic_nand_wait(), the chip must first be
selected.
When using the atmel nand flash controller, a panic would occur due to
a NULL pointer exception.
Fixes: 2af7c6539931 ("mtd: Add panic_write for NAND flashes")
Cc: <stable@vger.kernel.org>
Signed-off-by: Brent Taylor <motobud@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 4c867115c53b..e48bf8260f54 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2799,15 +2799,18 @@ static int panic_nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) { struct nand_chip *chip = mtd_to_nand(mtd); + int chipnr = (int)(to >> chip->chip_shift); struct mtd_oob_ops ops; int ret; - /* Wait for the device to get ready */ - panic_nand_wait(mtd, chip, 400); - /* Grab the device */ panic_nand_get_device(chip, mtd, FL_WRITING); + chip->select_chip(mtd, chipnr); + + /* Wait for the device to get ready */ + panic_nand_wait(mtd, chip, 400); + memset(&ops, 0, sizeof(ops)); ops.len = len; ops.datbuf = (uint8_t *)buf; |