From: Mike Frysinger <vapier@gentoo.org>
Date: Thu, 25 Feb 2010 10:00:55 +0000 (+0000)
Subject: spi/bfin_spi: reject unsupported SPI modes
X-Git-Tag: v4.13~17164^2~2^2~6
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=7715aad4ef5cccb318942a0c47aef8a39d6130d7;p=mirror_ubuntu-bionic-kernel.git

spi/bfin_spi: reject unsupported SPI modes

Who knows what people will try!

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 18b313a57236..a91e556489a9 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -1022,6 +1022,10 @@ static int bfin_spi_setup(struct spi_device *spi)
 	}
 
 	/* translate common spi framework into our register */
+	if (spi->mode & ~(SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST)) {
+		dev_err(&spi->dev, "unsupported spi modes detected\n");
+		goto error;
+	}
 	if (spi->mode & SPI_CPOL)
 		chip->ctl_reg |= BIT_CTL_CPOL;
 	if (spi->mode & SPI_CPHA)