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| author | Ricardo Ribalda <ricardo.ribalda@gmail.com> | 2015-01-28 20:53:39 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-01-28 20:57:32 +0100 |
| commit | eb25f16c6f446936932f41f3ff811fbdc285bbc4 (patch) | |
| tree | bcab11daa1c12ed4a0b8b9719421937e7f95df2e /drivers/spi | |
| parent | spi/xilinx: Use polling mode on small transfers (diff) | |
| download | linux-eb25f16c6f446936932f41f3ff811fbdc285bbc4.tar.xz linux-eb25f16c6f446936932f41f3ff811fbdc285bbc4.zip | |
spi/xilinx: Check number of slaves range
The core only supports up to 32 slaves, and the chipselect function
expects the same.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-xilinx.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 337fda4e78a6..2ca55f6b5158 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -22,6 +22,8 @@ #include <linux/spi/xilinx_spi.h> #include <linux/io.h> +#define XILINX_SPI_MAX_CS 32 + #define XILINX_SPI_NAME "xilinx_spi" /* Register definitions as per "OPB Serial Peripheral Interface (SPI) (v1.00e) @@ -347,6 +349,11 @@ static int xilinx_spi_probe(struct platform_device *pdev) return -EINVAL; } + if (num_cs > XILINX_SPI_MAX_CS) { + dev_err(&pdev->dev, "Invalid number of spi slaves\n"); + return -EINVAL; + } + master = spi_alloc_master(&pdev->dev, sizeof(struct xilinx_spi)); if (!master) return -ENODEV; |