From: Trent Piepho tpiepho@impinj.com
[ Upstream commit 605b3bec73cbd74b4ac937b580cd0b47d1300484 ]
spidev will make a big fuss if a device tree node binds a device by using "spidev" as the node's compatible property.
However, the logic for this isn't looking for "spidev" in the compatible, but rather checking that the device is NOT compatible with spidev's list of devices.
This causes a false positive if a device not named "rohm,dh2228fv", etc. binds to spidev, even if a means other than putting "spidev" in the device tree was used. E.g., the sysfs driver_override attribute.
Signed-off-by: Trent Piepho tpiepho@impinj.com Reviewed-by: Jan Kundrát jan.kundrat@cesnet.cz Tested-by: Jan Kundrát jan.kundrat@cesnet.cz Reviewed-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spidev.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index d0e7dfc647cf2..c5f1045561acc 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -713,11 +713,9 @@ static int spidev_probe(struct spi_device *spi) * compatible string, it is a Linux implementation thing * rather than a description of the hardware. */ - if (spi->dev.of_node && !of_match_device(spidev_dt_ids, &spi->dev)) { - dev_err(&spi->dev, "buggy DT: spidev listed directly in DT\n"); - WARN_ON(spi->dev.of_node && - !of_match_device(spidev_dt_ids, &spi->dev)); - } + WARN(spi->dev.of_node && + of_device_is_compatible(spi->dev.of_node, "spidev"), + "%pOF: buggy DT: spidev listed directly in DT\n", spi->dev.of_node);
/* Allocate driver data */ spidev = kzalloc(sizeof(*spidev), GFP_KERNEL);