linux-kernel - [ 45/47] spi-topcliff-pch: add recovery processing in case wait-event timeout

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Date:	Fri, 18 May 2012 14:27:34 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Tomoya MORINAGA <tomoya.rohm@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: [ 45/47] spi-topcliff-pch: add recovery processing in case wait-event timeout

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

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

From: Tomoya MORINAGA <tomoya.rohm@...il.com>

commit 0f57e168aa109775430c76cc663fb64909813d84 upstream.

Currently, pch_spi_start_transfer failure is not anticipated.
This patch adds the processing.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/spi/spi-topcliff-pch.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1266,8 +1266,16 @@ static void pch_spi_process_messages(str
 			char *save_rx_buf = data->cur_trans->rx_buf;
 			for (i = 0; i < cnt; i ++) {
 				pch_spi_handle_dma(data, &bpw);
-				if (!pch_spi_start_transfer(data))
+				if (!pch_spi_start_transfer(data)) {
+					data->transfer_complete = true;
+					data->current_msg->status = -EIO;
+					data->current_msg->complete
+						   (data->current_msg->context);
+					data->bcurrent_msg_processing = false;
+					data->current_msg = NULL;
+					data->cur_trans = NULL;
 					goto out;
+				}
 				pch_spi_copy_rx_data_for_dma(data, bpw);
 			}
 			data->cur_trans->rx_buf = save_rx_buf;


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