Message ID | 20190802134629.12749-1-patrice.chotard@st.com |
---|---|
State | Accepted |
Commit | dfe72d081d4eda0c0788dc5db69de3abbec1b857 |
Delegated to: | Jagannadha Sutradharudu Teki |
Headers | show |
Series | [U-Boot] spi: soft_spi: Fix data abort if slave is not probed | expand |
On Fri, Aug 2, 2019 at 7:16 PM Patrice Chotard <patrice.chotard@st.com> wrote: > > From: Christophe Kerello <christophe.kerello@st.com> > > In case spi_get_bus_and_cs callback is used, spi bus is first probed > then slave devices are probed. To avoid a data abort in soft_spi probe > function, we need to check that (slave != NULL). > > If slave is NULL, cs_flags and clk_flags will be initialized with > respectively GPIOD_ACTIVE_LOW and 0. > > Signed-off-by: Christophe Kerello <christophe.kerello@st.com> > Signed-off-by: Patrice Chotard <patrice.chotard@st.com> > --- Applied to u-boot-spi/master
diff --git a/drivers/spi/soft_spi.c b/drivers/spi/soft_spi.c index b06883f9d0..b80f810bd1 100644 --- a/drivers/spi/soft_spi.c +++ b/drivers/spi/soft_spi.c @@ -215,8 +215,8 @@ static int soft_spi_probe(struct udevice *dev) int cs_flags, clk_flags; int ret; - cs_flags = (slave->mode & SPI_CS_HIGH) ? 0 : GPIOD_ACTIVE_LOW; - clk_flags = (slave->mode & SPI_CPOL) ? GPIOD_ACTIVE_LOW : 0; + cs_flags = (slave && slave->mode & SPI_CS_HIGH) ? 0 : GPIOD_ACTIVE_LOW; + clk_flags = (slave && slave->mode & SPI_CPOL) ? GPIOD_ACTIVE_LOW : 0; if (gpio_request_by_name(dev, "cs-gpios", 0, &plat->cs, GPIOD_IS_OUT | cs_flags) ||