From: Kukjin Kim <kgene.kim@samsung.com>
To: 'Mark Brown' <broonie@opensource.wolfsonmicro.com>,
'Grant Likely' <grant.likely@secretlab.ca>
Cc: linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org,
spi-devel-general@lists.sourceforge.net
Subject: RE: [PATCH 1/4] spi/s3c64xx: Fix handling of errors in gpio_request()
Date: Thu, 19 Jul 2012 15:46:11 +0900 [thread overview]
Message-ID: <184501cd657a$2f5b23d0$8e116b70$%kim@samsung.com> (raw)
In-Reply-To: <1342610921-31986-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Mark Brown wrote:
>
> 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 <broonie@opensource.wolfsonmicro.com>
> ---
> 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
Mark, thanks for your re-work 3th and 4th patches in this series :-)
Looks good to me, applied this series.
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
prev parent reply other threads:[~2012-07-19 6:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-18 11:28 [PATCH 1/4] spi/s3c64xx: Fix handling of errors in gpio_request() Mark Brown
2012-07-18 11:28 ` [PATCH 2/4] spi/s3c64xx: Put the /CS GPIO into output mode Mark Brown
2012-07-18 11:28 ` [PATCH 3/4] spi/s3c64xx: Convert to devm_request_and_ioremap() Mark Brown
2012-07-18 11:28 ` [PATCH 4/4] spi/s3c64xx: Expand S3C64XX_SPI_{DE,}ACT macros at call sites Mark Brown
2012-07-19 6:46 ` Kukjin Kim [this message]
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