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| author | Martin Sperl <kernel@martin.sperl.org> | 2015-11-27 13:56:03 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-12-12 23:05:18 +0000 |
| commit | 49ddedf3bfcb59a562c7db0e50aecd1422e9cdc9 (patch) | |
| tree | 7cff6705e103185779a162a5f2d7b46c6ab6d6ec /include/linux/spi | |
| parent | 8005c49d9aea74d382f474ce11afbbc7d7130bec (diff) | |
| download | lwn-49ddedf3bfcb59a562c7db0e50aecd1422e9cdc9.tar.gz lwn-49ddedf3bfcb59a562c7db0e50aecd1422e9cdc9.zip | |
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>
Diffstat (limited to 'include/linux/spi')
| -rw-r--r-- | include/linux/spi/spi.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index cce80e6dc7d1..4c54d4744107 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -762,10 +762,15 @@ struct spi_message { void *state; }; +static inline void spi_message_init_no_memset(struct spi_message *m) +{ + INIT_LIST_HEAD(&m->transfers); +} + static inline void spi_message_init(struct spi_message *m) { memset(m, 0, sizeof *m); - INIT_LIST_HEAD(&m->transfers); + spi_message_init_no_memset(m); } static inline void |