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ad2457894c
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>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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* BCH Error Location Module
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*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __ELM_H
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#define __ELM_H
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enum bch_ecc {
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BCH4_ECC = 0,
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BCH8_ECC,
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};
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/* ELM support 8 error syndrome process */
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#define ERROR_VECTOR_MAX 8
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#define BCH8_ECC_OOB_BYTES 13
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#define BCH4_ECC_OOB_BYTES 7
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/* RBL requires 14 byte even though BCH8 uses only 13 byte */
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#define BCH8_SIZE (BCH8_ECC_OOB_BYTES + 1)
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/* Uses 1 extra byte to handle erased pages */
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#define BCH4_SIZE (BCH4_ECC_OOB_BYTES + 1)
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/**
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* struct elm_errorvec - error vector for elm
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* @error_reported: set true for vectors error is reported
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* @error_uncorrectable: number of uncorrectable errors
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* @error_count: number of correctable errors in the sector
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* @error_loc: buffer for error location
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*
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*/
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struct elm_errorvec {
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bool error_reported;
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bool error_uncorrectable;
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int error_count;
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int error_loc[ERROR_VECTOR_MAX];
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};
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void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
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struct elm_errorvec *err_vec);
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int elm_config(struct device *dev, enum bch_ecc bch_type);
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#endif /* __ELM_H */
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