From: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
To: Sanchayan Maity <maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 1/4] spi: spi-fsl-dspi: Fix SPI transfer issue when using multiple SPI_IOC_MESSAGE
Date: Thu, 17 Nov 2016 16:52:43 -0800 [thread overview]
Message-ID: <b92d7535f6c34a2b011a1c7c75c7f6fe@agner.ch> (raw)
In-Reply-To: <bbdbc8df434dd2af74eb351b799a2812a1c1967e.1479384571.git.maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
On 2016-11-17 04:16, Sanchayan Maity wrote:
> Current DMA implementation had a bug where the DMA transfer would
> exit the loop in dspi_transfer_one_message after the completion of
> a single transfer. This results in a multi message transfer submitted
> with SPI_IOC_MESSAGE to terminate incorrectly without an error.
Looks good to me:
Reviewed-by: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
>
> Signed-off-by: Sanchayan Maity <maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> drivers/spi/spi-fsl-dspi.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
> index bc64700..b1ee1f5 100644
> --- a/drivers/spi/spi-fsl-dspi.c
> +++ b/drivers/spi/spi-fsl-dspi.c
> @@ -714,7 +714,7 @@ static int dspi_transfer_one_message(struct
> spi_master *master,
> SPI_RSER_TFFFE | SPI_RSER_TFFFD |
> SPI_RSER_RFDFE | SPI_RSER_RFDFD);
> status = dspi_dma_xfer(dspi);
> - goto out;
> + break;
> default:
> dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n",
> trans_mode);
> @@ -722,9 +722,13 @@ static int dspi_transfer_one_message(struct
> spi_master *master,
> goto out;
> }
>
> - if (wait_event_interruptible(dspi->waitq, dspi->waitflags))
> - dev_err(&dspi->pdev->dev, "wait transfer complete fail!\n");
> - dspi->waitflags = 0;
> + if (trans_mode != DSPI_DMA_MODE) {
> + if (wait_event_interruptible(dspi->waitq,
> + dspi->waitflags))
> + dev_err(&dspi->pdev->dev,
> + "wait transfer complete fail!\n");
> + dspi->waitflags = 0;
> + }
>
> if (transfer->delay_usecs)
> udelay(transfer->delay_usecs);
--
To unsubscribe from this list: send the line "unsubscribe linux-spi" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2016-11-18 0:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-10 12:19 [PATCH v3] spi: spi-fsl-dspi: Add DMA support for Vybrid Sanchayan Maity
[not found] ` <836dd6a84fa149cafdbb0b53e792d305febf6207.1478778329.git.maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-11-11 12:20 ` Mark Brown
2016-11-17 12:16 ` [PATCH 0/4] Fixes for Vybrid SPI DMA implementation Sanchayan Maity
2016-11-17 12:16 ` [PATCH 1/4] spi: spi-fsl-dspi: Fix SPI transfer issue when using multiple SPI_IOC_MESSAGE Sanchayan Maity
[not found] ` <bbdbc8df434dd2af74eb351b799a2812a1c1967e.1479384571.git.maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-11-18 0:52 ` Stefan Agner [this message]
2016-11-21 19:20 ` Applied "spi: spi-fsl-dspi: Fix SPI transfer issue when using multiple SPI_IOC_MESSAGE" to the spi tree Mark Brown
2016-11-17 12:16 ` [PATCH 2/4] spi: spi-fsl-dspi: Fix incorrect DMA setup Sanchayan Maity
[not found] ` <d83f4896d77f577ca92fd70534f6198bb3288d8a.1479384571.git.maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-11-18 1:03 ` Stefan Agner
[not found] ` <bc8d9b808b99d3b217361df6fa8853ea-XLVq0VzYD2Y@public.gmane.org>
2016-11-18 8:04 ` maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w
[not found] ` <20161118080403.GB1572-2b/appYahYDPUjlVagVGR1Kr0EmMEXJSn9A1Ff6Mc9Q@public.gmane.org>
2016-11-18 23:39 ` Stefan Agner
2016-11-17 12:16 ` [PATCH 3/4] spi: spi-fsl-dspi: Fix continuous selection format Sanchayan Maity
[not found] ` <c1e51fc92dbcc9c31dcdcdfab3eed40d7745308a.1479384571.git.maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-11-18 1:07 ` Stefan Agner
[not found] ` <c1c4a3f3eac6d4e7378971431bd5f595-XLVq0VzYD2Y@public.gmane.org>
2016-11-18 7:59 ` maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w
2016-11-17 12:16 ` [PATCH 4/4] spi: spi-fsl-dspi: Minor code cleanup and error path fixes Sanchayan Maity
2016-11-11 13:05 ` Applied "spi: spi-fsl-dspi: Add DMA support for Vybrid" to the spi tree Mark Brown
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=b92d7535f6c34a2b011a1c7c75c7f6fe@agner.ch \
--to=stefan-xlvq0vzyd2y@public.gmane.org \
--cc=broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).