From 58a91d96d0bfdcbed7f9795220e42e02ed3f2f89 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Thu, 21 May 2020 16:01:06 +0900 Subject: [PATCH] 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 Fixes: 2a68ea7896e3 ("mmc: renesas-sdhi: add support for R-Car Gen3 SDHI DMAC") Signed-off-by: Yoshihiro Shimoda Link: https://lore.kernel.org/r/1590044466-28372-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Tested-by: Wolfram Sang Signed-off-by: Ulf Hansson --- drivers/mmc/host/renesas_sdhi_internal_dmac.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 201b8ed..32ab991 100644 --- 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, }; /* -- 2.7.4