spi: add spi_message_init_no_memset to avoid zeroing the spi_message
In the spi_loopback_test driver there is the need to initialize a spi_message that is filled with values from a static structure. Applying spi_message_init to such a prefilled structure results in all the settings getting reset to zero, which is not what we want. Copying each field of spi_message separately instead always includes the risk that some new fields have not been implemented in the copying code. So here we introduce a version of spi_message_init called spi_message_init_no_memset that does not fill the structure with zero first, but only initializes the relevant list_heads. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -762,10 +762,15 @@ struct spi_message {
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void *state;
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};
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static inline void spi_message_init_no_memset(struct spi_message *m)
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{
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INIT_LIST_HEAD(&m->transfers);
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}
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static inline void spi_message_init(struct spi_message *m)
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{
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memset(m, 0, sizeof *m);
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INIT_LIST_HEAD(&m->transfers);
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spi_message_init_no_memset(m);
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}
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static inline void
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