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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-09-01 08:55:22 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-09-01 08:55:22 -0600 |
| commit | cc0fc0bbeb17dd33ed7bfea58d0178e9c007ff67 (patch) | |
| tree | e659a873a4095b594d21aa38ccbd415498aa7961 /drivers/spi/spi_s3c64xx.c | |
| parent | 2bfc96a127bc1cc94d26bfaa40159966064f9c8c (diff) | |
| download | kernel_samsung_smdk4412-cc0fc0bbeb17dd33ed7bfea58d0178e9c007ff67.zip kernel_samsung_smdk4412-cc0fc0bbeb17dd33ed7bfea58d0178e9c007ff67.tar.gz kernel_samsung_smdk4412-cc0fc0bbeb17dd33ed7bfea58d0178e9c007ff67.tar.bz2 | |
spi/spi_s3c64xx: Make probe more robust against missing board config
The S3C64xx SPI driver requires the machine to call s3c64xx_spi_set_info()
to select a few options, including the clock to use for the SPI controller.
If this is not done then a NULL will be passed as the clock name for
clk_get(), causing an obscure crash. Guard against this and other missing
configuration by validating that the clock name has been filled in in
the platform data that ets passed in.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/spi_s3c64xx.c')
| -rw-r--r-- | drivers/spi/spi_s3c64xx.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/spi/spi_s3c64xx.c b/drivers/spi/spi_s3c64xx.c index 9736581..a0b63b7 100644 --- a/drivers/spi/spi_s3c64xx.c +++ b/drivers/spi/spi_s3c64xx.c @@ -919,6 +919,13 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev) return -ENODEV; } + sci = pdev->dev.platform_data; + if (!sci->src_clk_name) { + dev_err(&pdev->dev, + "Board init must call s3c64xx_spi_set_info()\n"); + return -EINVAL; + } + /* Check for availability of necessary resource */ dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0); @@ -946,8 +953,6 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev) return -ENOMEM; } - sci = pdev->dev.platform_data; - platform_set_drvdata(pdev, master); sdd = spi_master_get_devdata(master); |