From: Krzysztof Kozlowski <krzk@kernel.org>
To: "Łukasz Stelmach" <l.stelmach@samsung.com>
Cc: linux-samsung-soc@vger.kernel.org, b.zolnierkie@samsung.com,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
Mark Brown <broonie@kernel.org>, Kukjin Kim <kgene@kernel.org>,
Andi Shyti <andi@etezian.org>,
linux-arm-kernel@lists.infradead.org, m.szyprowski@samsung.com
Subject: Re: [PATCH 7/8] spi: spi-s3c64xx: Increase transfer timeout
Date: Wed, 19 Aug 2020 14:49:40 +0200 [thread overview]
Message-ID: <20200819124940.GG18122@kozik-lap> (raw)
In-Reply-To: <20200819123208.12337-8-l.stelmach@samsung.com>
On Wed, Aug 19, 2020 at 02:32:07PM +0200, Łukasz Stelmach wrote:
> Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Why? Everything works fine and suddenly minimum timeout is 100 ms?
Best regards,
Krzysztof
> ---
> drivers/spi/spi-s3c64xx.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
> index 27d77600a820..27db1e0f6f32 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -464,7 +464,8 @@ static int s3c64xx_wait_for_dma(struct s3c64xx_spi_driver_data *sdd,
>
> /* millisecs to xfer 'len' bytes @ 'cur_speed' */
> ms = xfer->len * 8 * 1000 / sdd->cur_speed;
> - ms += 10; /* some tolerance */
> + ms = (ms * 10) + 30; /* some tolerance */
> + ms = max(ms, 100); /* minimum timeout */
>
> val = msecs_to_jiffies(ms) + 10;
> val = wait_for_completion_timeout(&sdd->xfer_completion, val);
> --
> 2.26.2
>
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next prev parent reply other threads:[~2020-08-19 12:52 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200819123225eucas1p28be1b1920ade0ba8997bc17da97599b6@eucas1p2.samsung.com>
2020-08-19 12:32 ` [PATCH 0/8] Some fixes for spi-s3c64xx Łukasz Stelmach
2020-08-19 12:32 ` [PATCH 1/8] spi: spi-s3c64xx: swap s3c64xx_spi_set_cs() and s3c64xx_enable_datapath() Łukasz Stelmach
2020-08-19 12:38 ` Krzysztof Kozlowski
2020-08-19 12:51 ` Lukasz Stelmach
2020-08-19 12:58 ` Krzysztof Kozlowski
2020-08-19 13:16 ` Mark Brown
2020-08-19 14:01 ` Lukasz Stelmach
2020-08-19 19:12 ` Mark Brown
2020-08-20 10:12 ` Lukasz Stelmach
2020-08-19 12:32 ` [PATCH 2/8] spi: spi-s3s64xx: Add S3C64XX_SPI_QUIRK_CS_AUTO for Exynos3250 Łukasz Stelmach
2020-08-19 12:39 ` Krzysztof Kozlowski
2020-08-19 13:01 ` Lukasz Stelmach
2020-08-19 13:06 ` Krzysztof Kozlowski
2020-08-19 19:38 ` Mark Brown
2020-08-20 10:47 ` Lukasz Stelmach
2020-08-19 12:32 ` [PATCH 3/8] spi: spi-s3c64xx: Report more information when errors occur Łukasz Stelmach
2020-08-19 12:43 ` Krzysztof Kozlowski
2020-08-19 12:32 ` [PATCH 4/8] spi: spi-s3c64xx: Rename S3C64XX_SPI_SLAVE_* to S3C64XX_SPI_CS_* Łukasz Stelmach
2020-08-19 12:44 ` Krzysztof Kozlowski
2020-08-19 12:32 ` [PATCH 5/8] spi: spi-s3c64xx: Fix doc comment for struct s3c64xx_spi_driver_data Łukasz Stelmach
2020-08-19 12:37 ` Krzysztof Kozlowski
2020-08-19 13:25 ` Lukasz Stelmach
2020-08-19 12:32 ` [PATCH 6/8] spi: spi-s3c64xx: Check return values Łukasz Stelmach
2020-08-19 12:48 ` Krzysztof Kozlowski
2020-08-19 15:41 ` Lukasz Stelmach
2020-08-19 16:13 ` Krzysztof Kozlowski
2020-08-19 12:32 ` [PATCH 7/8] spi: spi-s3c64xx: Increase transfer timeout Łukasz Stelmach
2020-08-19 12:49 ` Krzysztof Kozlowski [this message]
2020-08-19 13:39 ` Lukasz Stelmach
2020-08-21 7:10 ` Krzysztof Kozlowski
2020-08-19 12:32 ` [PATCH 8/8] spi: spi-s3c64xx: Turn on interrupts upon resume Łukasz Stelmach
2020-08-19 12:53 ` Krzysztof Kozlowski
2020-08-19 13:33 ` Lukasz Stelmach
2020-08-19 12:50 ` [PATCH 0/8] Some fixes for spi-s3c64xx Krzysztof Kozlowski
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