From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: [PATCH 1/4] spi/s3c64xx: Fix handling of errors in gpio_request() Date: Wed, 18 Jul 2012 12:28:38 +0100 Message-ID: <1342610921-31986-1-git-send-email-broonie@opensource.wolfsonmicro.com> Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, spi-devel-general@lists.sourceforge.net, Mark Brown To: Grant Likely , Kukjin Kim Return-path: Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org When gpio_request() fails the driver logged the failure but while it'd try to print an error code in the non-DT case it didn't pass the error code in so garbage would be logged and in the DT case the error wasn't logged. Further, in the non-DT case the error code was then overwritten with -EBUSY depriving the caller of information and breaking automatic probe deferral pushing back from the GPIO level. Also reformat the non-DT log message so it's not word wrapped and we can grep for it. Signed-off-by: Mark Brown --- drivers/spi/spi-s3c64xx.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 999154a0..7258b18 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -894,9 +894,9 @@ static int s3c64xx_spi_setup(struct spi_device *spi) if (!spi_get_ctldata(spi)) { err = gpio_request(cs->line, dev_name(&spi->dev)); if (err) { - dev_err(&spi->dev, "request for slave select gpio " - "line [%d] failed\n", cs->line); - err = -EBUSY; + dev_err(&spi->dev, + "Failed to get /CS gpio [%d]: %d\n", + cs->line, err); goto err_gpio_req; } spi_set_ctldata(spi, cs); @@ -1114,7 +1114,8 @@ static int s3c64xx_spi_parse_dt_gpio(struct s3c64xx_spi_driver_data *sdd) ret = gpio_request(gpio, "spi-bus"); if (ret) { - dev_err(dev, "gpio [%d] request failed\n", gpio); + dev_err(dev, "gpio [%d] request failed: %d\n", + gpio, ret); goto free_gpio; } } -- 1.7.10.4