linux-kernel - [PATCH 4.17 11/67] mmc: renesas_sdhi_internal_dmac: Cannot clear the RX_IN

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Message-Id: <20180716073444.849899456@linuxfoundation.org>
Date:   Mon, 16 Jul 2018 09:34:40 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 4.17 11/67] mmc: renesas_sdhi_internal_dmac: Cannot clear the RX_IN_USE in abort

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>

commit 25a98edd5795719c5187e16ea271e8de86e02809 upstream.

This patch is fixes an issue that the SDHI_INTERNAL_DMAC_RX_IN_USE
flag cannot be cleared because tmio_mmc_core sets the host->data
to NULL before the tmio_mmc_core calls tmio_mmc_abort_dma().

So, this patch clears the SDHI_INTERNAL_DMAC_RX_IN_USE in
the renesas_sdhi_internal_dmac_abort_dma() anyway. This doesn't
cause any side effects.

Fixes: 0cbc94daa554 ("mmc: renesas_sdhi_internal_dmac: limit DMA RX for old SoCs")
Cc: <stable@...r.kernel.org> # v4.17+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Simon Horman <horms+renesas@...ge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mmc/host/renesas_sdhi_internal_dmac.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -139,8 +139,7 @@ renesas_sdhi_internal_dmac_abort_dma(str
 	renesas_sdhi_internal_dmac_dm_write(host, DM_CM_RST,
 					    RST_RESERVED_BITS | val);
 
-	if (host->data && host->data->flags & MMC_DATA_READ)
-		clear_bit(SDHI_INTERNAL_DMAC_RX_IN_USE, &global_flags);
+	clear_bit(SDHI_INTERNAL_DMAC_RX_IN_USE, &global_flags);
 
 	renesas_sdhi_internal_dmac_enable_dma(host, true);
 }