From: Chunyan Zhang <zhang.lyra@gmail.com>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>,
Mark Brown <broonie@kernel.org>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Ludovic Desroches <ludovic.desroches@microchip.com>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Florian Fainelli <f.fainelli@gmail.com>,
Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
bcm-kernel-feedback-list@broadcom.com,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Orson Zhai <orsonzhai@gmail.com>,
Baolin Wang <baolin.wang7@gmail.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Masahisa Kojima <masahisa.kojima@linaro.org>,
Jassi Brar <jaswinder.singh@linaro.org>,
Laxman Dewangan <ldewangan@nvidia.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
linux-spi@vger.kernel.org,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-rpi-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-tegra@vger.kernel.org, stable <stable@vger.kernel.org>
Subject: Re: [PATCH 01/11] spi: sprd: Release DMA channel also on probe deferral
Date: Tue, 8 Sep 2020 15:27:10 +0800 [thread overview]
Message-ID: <CAAfSe-u6Prn=nnX8Y67DearNEuHH90Fo71R7hmxbvWGuPxyk2w@mail.gmail.com> (raw)
In-Reply-To: <20200901152713.18629-1-krzk@kernel.org>
On Tue, 1 Sep 2020 at 23:27, Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> If dma_request_chan() for TX channel fails with EPROBE_DEFER, the RX
> channel would not be released and on next re-probe it would be requested
> second time.
>
> Fixes: 386119bc7be9 ("spi: sprd: spi: sprd: Add DMA mode support")
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Thanks,
Chunyan
> ---
> drivers/spi/spi-sprd.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi-sprd.c b/drivers/spi/spi-sprd.c
> index 6678f1cbc566..0443fec3a6ab 100644
> --- a/drivers/spi/spi-sprd.c
> +++ b/drivers/spi/spi-sprd.c
> @@ -563,11 +563,11 @@ static int sprd_spi_dma_request(struct sprd_spi *ss)
>
> ss->dma.dma_chan[SPRD_SPI_TX] = dma_request_chan(ss->dev, "tx_chn");
> if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_TX])) {
> + dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]);
> if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]) == -EPROBE_DEFER)
> return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
>
> dev_err(ss->dev, "request TX DMA channel failed!\n");
> - dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]);
> return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
> }
>
> --
> 2.17.1
>
next prev parent reply other threads:[~2020-09-08 7:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 15:27 [PATCH 01/11] spi: sprd: Release DMA channel also on probe deferral Krzysztof Kozlowski
2020-09-01 15:27 ` [PATCH 02/11] spi: sprd: Simplify with dev_err_probe() Krzysztof Kozlowski
2020-09-08 7:27 ` Chunyan Zhang
2020-09-08 13:22 ` Mark Brown
2020-09-01 15:27 ` [PATCH 03/11] spi: atmel: " Krzysztof Kozlowski
2020-09-01 19:12 ` Alexandre Belloni
2020-09-01 15:27 ` [PATCH 04/11] spi: bcm2835: " Krzysztof Kozlowski
2020-09-01 16:08 ` Florian Fainelli
2020-09-01 15:27 ` [PATCH 05/11] spi: cadence-quadspi: " Krzysztof Kozlowski
2020-09-01 15:27 ` [PATCH 06/11] spi: spi-mux: " Krzysztof Kozlowski
2020-09-01 15:27 ` [PATCH 07/11] spi: qcom-qspi: " Krzysztof Kozlowski
2020-09-01 15:27 ` [PATCH 08/11] spi: stm32: " Krzysztof Kozlowski
2020-09-08 13:53 ` Alain Volmat
2020-09-01 15:27 ` [PATCH 09/11] spi: synquacer: " Krzysztof Kozlowski
2020-09-01 15:27 ` [PATCH 10/11] spi: tegra114: " Krzysztof Kozlowski
2020-09-01 15:27 ` [PATCH 11/11] spi: tegra20: " Krzysztof Kozlowski
2020-09-08 7:27 ` Chunyan Zhang [this message]
2020-09-08 17:21 ` [PATCH 01/11] spi: sprd: Release DMA channel also on probe deferral Mark Brown
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