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| author | Mark Brown <broonie@kernel.org> | 2015-08-31 16:45:27 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-08-31 16:45:27 +0300 |
| commit | bc6450994976f26bbde656b1994f95b955bdabfc (patch) | |
| tree | 464732f5478c63938973aea3afc1f3d632f1ef5e /drivers/spi | |
| parent | af211211e39f59575854d5976a4e301c8c21d4bc (diff) | |
| parent | 63ab645f4d8b2dc1351c41751e7ebb1b3f1c99d3 (diff) | |
| download | linux-bc6450994976f26bbde656b1994f95b955bdabfc.tar.xz | |
Merge remote-tracking branch 'spi/topic/core' into spi-next
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index cf8b91b23a76..829323ce7cdf 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1740,6 +1740,20 @@ EXPORT_SYMBOL_GPL(spi_busnum_to_master); * other core methods are currently defined as inline functions. */ +static int __spi_validate_bits_per_word(struct spi_master *master, u8 bits_per_word) +{ + if (master->bits_per_word_mask) { + /* Only 32 bits fit in the mask */ + if (bits_per_word > 32) + return -EINVAL; + if (!(master->bits_per_word_mask & + SPI_BPW_MASK(bits_per_word))) + return -EINVAL; + } + + return 0; +} + /** * spi_setup - setup SPI mode and clock rate * @spi: the device whose settings are being modified @@ -1798,6 +1812,9 @@ int spi_setup(struct spi_device *spi) if (!spi->bits_per_word) spi->bits_per_word = 8; + if (__spi_validate_bits_per_word(spi->master, spi->bits_per_word)) + return -EINVAL; + if (!spi->max_speed_hz) spi->max_speed_hz = spi->master->max_speed_hz; @@ -1860,19 +1877,15 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) if (!xfer->speed_hz) xfer->speed_hz = spi->max_speed_hz; + if (!xfer->speed_hz) + xfer->speed_hz = master->max_speed_hz; if (master->max_speed_hz && xfer->speed_hz > master->max_speed_hz) xfer->speed_hz = master->max_speed_hz; - if (master->bits_per_word_mask) { - /* Only 32 bits fit in the mask */ - if (xfer->bits_per_word > 32) - return -EINVAL; - if (!(master->bits_per_word_mask & - BIT(xfer->bits_per_word - 1))) - return -EINVAL; - } + if (__spi_validate_bits_per_word(master, xfer->bits_per_word)) + return -EINVAL; /* * SPI transfer length should be multiple of SPI word size |