imsm: fix: does not allow to use invalid chunk size
Only least significant bit of chunk size provided by user has been used in test with OROM capabilities. This way user could pass value which is not a power of 2. Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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@ -124,11 +124,13 @@ static inline int imsm_orom_has_raid5(const struct imsm_orom *orom)
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static inline int imsm_orom_has_chunk(const struct imsm_orom *orom, int chunk)
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{
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int fs = ffs(chunk);
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int orom_chunk_bit;
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if (!fs)
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return 0;
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fs--; /* bit num to bit index */
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return !!(orom->sss & (1 << (fs - 1)));
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orom_chunk_bit = (orom->sss & (1 << (fs - 1)));
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return orom_chunk_bit && 1 << orom_chunk_bit == chunk;
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}
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