linux-kernel - [PATCH 4/4] spi-topcliff-pch: add recovery processing in case wait-event timeout

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Message-Id: <1323404009-3476-3-git-send-email-tomoya.rohm@gmail.com>
Date:	Fri,  9 Dec 2011 13:13:29 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Grant Likely <grant.likely@...retlab.ca>,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Cc:	qi.wang@...el.com, yong.y.wang@...el.com, joel.clark@...el.com,
	kok.howg.ewe@...el.com, Wolfram Sang <w.sang@...gutronix.de>,
	Tomoya MORINAGA <tomoya.rohm@...il.com>
Subject: [PATCH 4/4] spi-topcliff-pch: add recovery processing in case wait-event timeout

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

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
---
 drivers/spi/spi-topcliff-pch.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 1864555..10b684c 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1262,8 +1262,16 @@ static void pch_spi_process_messages(struct work_struct *pwork)
 			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;
-- 
1.7.4.4

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