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authorMartin Sperl <kernel@martin.sperl.org>2015-11-27 16:56:03 +0300
committerMark Brown <broonie@kernel.org>2015-12-13 02:05:18 +0300
commit49ddedf3bfcb59a562c7db0e50aecd1422e9cdc9 (patch)
tree7cff6705e103185779a162a5f2d7b46c6ab6d6ec /include/linux/spi
parent8005c49d9aea74d382f474ce11afbbc7d7130bec (diff)
downloadlinux-49ddedf3bfcb59a562c7db0e50aecd1422e9cdc9.tar.xz
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.h7
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