From 190657c9f464b9f99a05a6ed8476c8bbccbc6a8b Mon Sep 17 00:00:00 2001 From: Subhash Jadavani Date: Mon, 2 May 2011 18:10:40 +0530 Subject: [PATCH] mmc: msm_sdcc: Handle dma resource not present case If DMA resource is not available then SDCC driver should atleast work in PIO data transfer mode. Signed-off-by: Subhash Jadavani Signed-off-by: Sahitya Tummala Signed-off-by: David Brown Signed-off-by: Chris Ball --- drivers/mmc/host/msm_sdcc.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c index a835ac0269e..61c7d385fd3 100644 --- a/drivers/mmc/host/msm_sdcc.c +++ b/drivers/mmc/host/msm_sdcc.c @@ -1242,9 +1242,13 @@ msmsdcc_probe(struct platform_device *pdev) /* * Setup DMA */ - ret = msmsdcc_init_dma(host); - if (ret) - goto ioremap_free; + if (host->dmares) { + ret = msmsdcc_init_dma(host); + if (ret) + goto ioremap_free; + } else { + host->dma.channel = -1; + } /* Get our clocks */ host->pclk = clk_get(&pdev->dev, "sdc_pclk"); @@ -1388,8 +1392,9 @@ msmsdcc_probe(struct platform_device *pdev) pclk_put: clk_put(host->pclk); dma_free: - dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata), - host->dma.nc, host->dma.nc_busaddr); + if (host->dmares) + dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata), + host->dma.nc, host->dma.nc_busaddr); ioremap_free: tasklet_kill(&host->dma_tlet); iounmap(host->base); -- 2.41.0