[PATCH 5.10 005/116] mmc: sdhci-of-esdhc: Check for error num after setting mask

Greg Kroah-Hartman
2022-02-14T09:49:28Z

From: Jiasheng Jiang <jiasheng@iscas.ac.cn>

commit 40c67c291a93f8846c4a972c9ef1b7ba4544c8d0 upstream.

Because of the possible failure of the dma_supported(), the
dma_set_mask_and_coherent() may return error num.
Therefore, it should be better to check it and return the error if
fails.
And since the sdhci_setup_host() has already checked the return value of
the enable_dma, we need not check it in sdhci_resume_host() again.

Fixes: 5552d7ad596c ("mmc: sdhci-of-esdhc: set proper dma mask for ls104x chips")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220112083156.1124782-1-jiasheng@iscas.ac.cn
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mmc/host/sdhci-of-esdhc.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -524,12 +524,16 @@ static void esdhc_of_adma_workaround(str

static int esdhc_of_enable_dma(struct sdhci_host *host)
{
+ int ret;
u32 value;
struct device *dev = mmc_dev(host->mmc);

if (of_device_is_compatible(dev->of_node, "fsl,ls1043a-esdhc") ||
- of_device_is_compatible(dev->of_node, "fsl,ls1046a-esdhc"))
- dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+ of_device_is_compatible(dev->of_node, "fsl,ls1046a-esdhc")) {
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+ if (ret)
+ return ret;
+ }

value = sdhci_readl(host, ESDHC_DMA_SYSCTL);