mmc: renesas_sdhi_internal_dmac: Fix dma unmapping in error cases

If this controller doesn't issue interrupt for response of command,
this driver lacks to call dma_unmap_sg(). So, fix the issue by
using end() of struct tmio_mmc_dma_ops.

Reported-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
Fixes: 2a68ea7896e3 ("mmc: renesas-sdhi: add support for R-Car Gen3 SDHI DMAC")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/1590044466-28372-4-git-send-email-yoshihiro.shimoda.uh@renesas.com
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index 201b8ed..32ab991 100644 (file)
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -233,6 +233,9 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host)
 {
        enum dma_data_direction dir;
 
+       if (!host->dma_on)
+               return false;
+
        if (!host->data)
                return false;
 
@@ -247,6 +250,8 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host)
        if (dir == DMA_FROM_DEVICE)
                clear_bit(SDHI_INTERNAL_DMAC_RX_IN_USE, &global_flags);
 
+       host->dma_on = false;
+
        return true;
 }
 
@@ -263,6 +268,12 @@ out:
        spin_unlock_irq(&host->lock);
 }
 
+static void renesas_sdhi_internal_dmac_end_dma(struct tmio_mmc_host *host)
+{
+       if (host->data)
+               renesas_sdhi_internal_dmac_complete(host);
+}
+
 static void
 renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host,
                                       struct tmio_mmc_data *pdata)
@@ -300,6 +311,7 @@ static const struct tmio_mmc_dma_ops renesas_sdhi_internal_dmac_dma_ops = {
        .release = renesas_sdhi_internal_dmac_release_dma,
        .abort = renesas_sdhi_internal_dmac_abort_dma,
        .dataend = renesas_sdhi_internal_dmac_dataend_dma,
+       .end = renesas_sdhi_internal_dmac_end_dma,
 };
 
 /*