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mtd: devices: elm: check for device's presence before configuration

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In case the driver is not probed - due to config mismatches or errors
in the DTS files - dev_get_drvdata() returns NULL, leading to an Ooops
during boot.

Make elm_config() return an error in such cases to propagate the error
up to the user, so it can fall back to software mode.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Daniel Mack
2013-03-04 00:57:20 +01:00
committed by David Woodhouse
parent 0cca9fbf5d
commit ad2457894c
3 changed files with 12 additions and 4 deletions
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include/linux/platform_data/elm.h
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@@ -50,5 +50,5 @@ struct elm_errorvec {
void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
struct elm_errorvec *err_vec);
void elm_config(struct device *dev, enum bch_ecc bch_type);
int elm_config(struct device *dev, enum bch_ecc bch_type);
#endif /* __ELM_H */