spi: add spi_message_init_no_memset to avoid zeroing the spi_message
authorMartin Sperl <kernel@martin.sperl.org>
Fri, 27 Nov 2015 13:56:03 +0000 (13:56 +0000)
committerMark Brown <broonie@kernel.org>
Sat, 12 Dec 2015 23:05:18 +0000 (23:05 +0000)
commit49ddedf3bfcb59a562c7db0e50aecd1422e9cdc9
tree7cff6705e103185779a162a5f2d7b46c6ab6d6ec
parent8005c49d9aea74d382f474ce11afbbc7d7130bec
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>
include/linux/spi/spi.h