evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

spi: Fall back to master maximum speed if no slave speed specified

Browse source 
If a slave appears with no maximum transfer speed specified fall back to
using the maximum for the master instead.  It's questionable if we
should let slaves do this but let's be defensive.

Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2015-08-20 11:52:18 -07:00
parent bc0195aad0
commit 7dc9fbc342
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/spi/spi.c
View file

@ -1860,6 +1860,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
if (!xfer->speed_hz) if (!xfer->speed_hz)
xfer->speed_hz = spi->max_speed_hz; xfer->speed_hz = spi->max_speed_hz;
if (!xfer->speed_hz)
xfer->speed_hz = master->max_speed_hz;
if (master->max_speed_hz && if (master->max_speed_hz &&
xfer->speed_hz > master->max_speed_hz) xfer->speed_hz > master->max_speed_hz)