mmc: renesas_sdhi_internal_dmac: Fix missing unmap in error patch

This patch fixes an issue that lacks the dma_unmap_sg() calling in
the error patch of renesas_sdhi_internal_dmac_start_dma().

Fixes: 0cbc94daa554 ("mmc: renesas_sdhi_internal_dmac: limit DMA RX for old SoCs")
Cc: <stable@vger.kernel.org> # v4.17+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
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 f7f9773..d676a20 100644 (file)
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -164,17 +164,14 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
                goto force_pio;
 
        /* This DMAC cannot handle if buffer is not 8-bytes alignment */
-       if (!IS_ALIGNED(sg_dma_address(sg), 8)) {
-               dma_unmap_sg(&host->pdev->dev, sg, host->sg_len,
-                            mmc_get_dma_dir(data));
-               goto force_pio;
-       }
+       if (!IS_ALIGNED(sg_dma_address(sg), 8))
+               goto force_pio_with_unmap;
 
        if (data->flags & MMC_DATA_READ) {
                dtran_mode |= DTRAN_MODE_CH_NUM_CH1;
                if (test_bit(SDHI_INTERNAL_DMAC_ONE_RX_ONLY, &global_flags) &&
                    test_and_set_bit(SDHI_INTERNAL_DMAC_RX_IN_USE, &global_flags))
-                       goto force_pio;
+                       goto force_pio_with_unmap;
        } else {
                dtran_mode |= DTRAN_MODE_CH_NUM_CH0;
        }
@@ -189,6 +186,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
 
        return;
 
+force_pio_with_unmap:
+       dma_unmap_sg(&host->pdev->dev, sg, host->sg_len, mmc_get_dma_dir(data));
+
 force_pio:
        host->force_pio = true;
        renesas_sdhi_internal_dmac_enable_dma(host, false);