From 07591bda0e574ff661b734e22f40cf4492e8c047 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Thu, 20 Aug 2015 11:52:18 -0700 Subject: [PATCH] spi: Fall back to master maximum speed if no slave speed specified 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 --- drivers/spi/spi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index cf8b91b23a763..637d892b316de 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1860,6 +1860,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) if (!xfer->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 && xfer->speed_hz > master->max_speed_hz) -- 2.39.5