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| author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-05-26 18:10:15 +0300 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-05-30 09:59:26 +0300 |
| commit | 4a78cc644eed3cf2dae00c3a959910a86c140fd6 (patch) | |
| tree | 38f3d52750e2761fe156bb11f2e9f5c4907b86d4 /include/linux/mtd | |
| parent | cc0f51ec111266f5d255e753bf3254ad411d5c12 (diff) | |
| download | linux-4a78cc644eed3cf2dae00c3a959910a86c140fd6.tar.xz | |
mtd: nand: Make sure drivers not supporting SET/GET_FEATURES return -ENOTSUPP
A lot of drivers are providing their own ->cmdfunc(), and most of the
time this implementation does not support all possible NAND operations.
But since ->cmdfunc() cannot return an error code, the core has no way
to know that the operation it requested is not supported.
This is a problem we cannot address for all kind of operations with the
current design, but we can prevent these silent failures for the
GET/SET FEATURES operation by overloading the default
->onfi_{set,get}_features() methods with one returning -ENOTSUPP.
Reported-by: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/nand.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 7a01d2eb7443..28f7dd9177e9 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -1259,6 +1259,11 @@ int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, int page); int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip, int page); +/* Stub used by drivers that do not support GET/SET FEATURES operations */ +int nand_onfi_get_set_features_notsupp(struct mtd_info *mtd, + struct nand_chip *chip, int addr, + u8 *subfeature_param); + /* Default read_page_raw implementation */ int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int oob_required, int page); |