Hi,
On Tue, Jan 03, 2017 at 02:01:25PM +0100, Boris Brezillon wrote:
> A lot of NANDs are implementing generic features in a non-generic way,
> or are providing advanced auto-detection logic where the NAND ID bytes
> meaning changes with the NAND generation.
>
> Providing this vendor specific initialization step will allow us to get
> rid of the full ids in the nand_ids table or all the vendor specific
> cases added over the time in the generic NAND ID decoding logic.
>
> Signed-off-by: Boris Brezillon <[email protected]>
> ---
> drivers/mtd/nand/nand_base.c | 67
> +++++++++++++++++++++++++++++++++++---------
> include/linux/mtd/nand.h | 35 +++++++++++++++++++++++
> 2 files changed, 89 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
> index efb3ade568d8..8f80faa57984 100644
> --- a/drivers/mtd/nand/nand_base.c
> +++ b/drivers/mtd/nand/nand_base.c
...
> @@ -4163,6 +4196,10 @@ static int nand_detect(struct nand_chip *chip, struct
> nand_flash_dev *type)
> if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
> chip->cmdfunc = nand_command_lp;
>
> + ret = nand_manufacturer_init(chip);
> + if (ret)
> + return ret;
> +
AFAICT, you're leaking anything that should be cleaned up in the
->cleanup() hook, for any error case after this. Not absolutely critical
to fix immediately, but I'd expect we should fix this in the 4.12 cycle.
> pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
> maf_id, dev_id);
>
> @@ -4907,6 +4944,10 @@ void nand_cleanup(struct nand_chip *chip)
> if (chip->badblock_pattern && chip->badblock_pattern->options
> & NAND_BBT_DYNAMICSTRUCT)
> kfree(chip->badblock_pattern);
> +
> + /* Release manufacturer private data */
> + if (chip->manufacturer.ops && chip->manufacturer.ops->cleanup)
> + chip->manufacturer.ops->cleanup(chip);
> }
> EXPORT_SYMBOL_GPL(nand_cleanup);
>
[...]
Brian
