Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[mirror_ubuntu-artful-kernel.git] / drivers / mmc / host / atmel-mci.c

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index fcfe1eb5acc8f421a1e10a3c387c3c139171ef4d..e4449a54ae8f9fc68c3d9f719fe3a09e3e028adf 100644 (file)
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -969,11 +969,14 @@ static void atmci_start_request(struct atmel_mci *host,
        host->data_status = 0;
 
        if (host->need_reset) {
+               iflags = atmci_readl(host, ATMCI_IMR);
+               iflags &= (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB);
                atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST);
                atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN);
                atmci_writel(host, ATMCI_MR, host->mode_reg);
                if (host->caps.has_cfg_reg)
                        atmci_writel(host, ATMCI_CFG, host->cfg_reg);
+               atmci_writel(host, ATMCI_IER, iflags);
                host->need_reset = false;
        }
        atmci_writel(host, ATMCI_SDCR, slot->sdc_reg);
@@ -1945,12 +1948,12 @@ static bool atmci_filter(struct dma_chan *chan, void *slave)
        }
 }
 
-static void atmci_configure_dma(struct atmel_mci *host)
+static bool atmci_configure_dma(struct atmel_mci *host)
 {
        struct mci_platform_data        *pdata;
 
        if (host == NULL)
-               return;
+               return false;
 
        pdata = host->pdev->dev.platform_data;
 
@@ -1967,12 +1970,15 @@ static void atmci_configure_dma(struct atmel_mci *host)
                host->dma.chan =
                        dma_request_channel(mask, atmci_filter, pdata->dma_slave);
        }
-       if (!host->dma.chan)
-               dev_notice(&host->pdev->dev, "DMA not available, using PIO\n");
-       else
+       if (!host->dma.chan) {
+               dev_warn(&host->pdev->dev, "no DMA channel available\n");
+               return false;
+       } else {
                dev_info(&host->pdev->dev,
                                        "Using %s for DMA transfers\n",
                                        dma_chan_name(host->dma.chan));
+               return true;
+       }
 }
 
 static inline unsigned int atmci_get_version(struct atmel_mci *host)
@@ -2082,8 +2088,7 @@ static int __init atmci_probe(struct platform_device *pdev)
 
        /* Get MCI capabilities and set operations according to it */
        atmci_get_cap(host);
-       if (host->caps.has_dma) {
-               dev_info(&pdev->dev, "using DMA\n");
+       if (host->caps.has_dma && atmci_configure_dma(host)) {
                host->prepare_data = &atmci_prepare_data_dma;
                host->submit_data = &atmci_submit_data_dma;
                host->stop_transfer = &atmci_stop_transfer_dma;
@@ -2093,15 +2098,12 @@ static int __init atmci_probe(struct platform_device *pdev)
                host->submit_data = &atmci_submit_data_pdc;
                host->stop_transfer = &atmci_stop_transfer_pdc;
        } else {
-               dev_info(&pdev->dev, "no DMA, no PDC\n");
+               dev_info(&pdev->dev, "using PIO\n");
                host->prepare_data = &atmci_prepare_data;
                host->submit_data = &atmci_submit_data;
                host->stop_transfer = &atmci_stop_transfer;
        }
 
-       if (host->caps.has_dma)
-               atmci_configure_dma(host);
-
        platform_set_drvdata(pdev, host);
 
        /* We need at least one slot to succeed */