linux-kernel - [6/7] ARM: 7220/1: mmc: mmci: Fixup error handling for dma

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Date:	Tue, 03 Jan 2012 14:01:36 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Per Forlin <per.forlin@...ricsson.com>,
	Ulf Hansson <ulf.hansson@...ricsson.com>,
	Russell King <rmk+kernel@....linux.org.uk>
Subject: [6/7] ARM: 7220/1: mmc: mmci: Fixup error handling for dma

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

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

From: Ulf Hansson <ulf.hansson@...ricsson.com>

commit 3b6e3c73851a9a4b0e6ed9d378206341dd65e8a5 upstream.

When getting a cmd irq during an ongoing data transfer
with dma, the dma job were never terminated. This is now
corrected.

Tested-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Per Forlin <per.forlin@...ricsson.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...ricsson.com>
Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mmc/host/mmci.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -232,8 +232,12 @@ mmci_cmd_irq(struct mmci_host *host, str
 	}
 
 	if (!cmd->data || cmd->error) {
-		if (host->data)
+		if (host->data) {
+			/* Terminate the DMA transfer */
+			if (dma_inprogress(host))
+				mmci_dma_data_error(host);
 			mmci_stop_data(host);
+		}
 		mmci_request_end(host, cmd->mrq);
 	} else if (!(cmd->data->flags & MMC_DATA_READ)) {
 		mmci_start_data(host, cmd->data);


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