From fd8a11e100b463811f41266ea3880c830f3359ea Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Thu, 18 Jun 2009 16:49:01 -0700 Subject: spi_mpc83xx: quieten down the "Requested speed is too low" message When a platform is running at high frequencies it's not always possible to scale-down a frequency to a requested value, and using mmc_spi driver this leads to the following printk flood during card polling: ... mmc_spi spi32766.0: Requested speed is too low: 400000 Hz. Will use 520828 Hz instead. mmc_spi spi32766.0: Requested speed is too low: 400000 Hz. Will use 520828 Hz instead. ... Fix this by using WARN_ONCE(), it's better than the flood, and also better than turning dev_err() into dev_dbg(), since we actually want to warn that some things may not work correctly. Signed-off-by: Anton Vorontsov Cc: Kumar Gala Cc: David Brownell Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/spi/spi_mpc83xx.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'drivers/spi/spi_mpc83xx.c') diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c index ce61be98e06d..4988230a7e0c 100644 --- a/drivers/spi/spi_mpc83xx.c +++ b/drivers/spi/spi_mpc83xx.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -275,12 +276,12 @@ int mpc83xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) if ((mpc83xx_spi->spibrg / hz) > 64) { cs->hw_mode |= SPMODE_DIV16; pm = mpc83xx_spi->spibrg / (hz * 64); - if (pm > 16) { - dev_err(&spi->dev, "Requested speed is too " - "low: %d Hz. Will use %d Hz instead.\n", - hz, mpc83xx_spi->spibrg / 1024); + + WARN_ONCE(pm > 16, "%s: Requested speed is too low: %d Hz. " + "Will use %d Hz instead.\n", dev_name(&spi->dev), + hz, mpc83xx_spi->spibrg / 1024); + if (pm > 16) pm = 16; - } } else pm = mpc83xx_spi->spibrg / (hz * 4); if (pm) -- cgit v1.2.3-55-g7522