linux-kernel - [PATCH v2 5/7] ASoC: SigmaDSP: Provide diagnostic error messages

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Date:	Mon, 28 Nov 2011 09:44:18 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Mike Frysinger <vapier@...too.org>,
	<linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>,
	<drivers@...log.com>, Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH v2 5/7] ASoC: SigmaDSP: Provide diagnostic error messages

Provide some error messages when loading the firmware fails, so it is possible
to diagnose the reason for the failure.

Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>

---
Changes since v1:
	* Don't split error message string across multiple lines.
---
 sound/soc/codecs/sigmadsp.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/sigmadsp.c b/sound/soc/codecs/sigmadsp.c
index acb97a9..c0ad885 100644
--- a/sound/soc/codecs/sigmadsp.c
+++ b/sound/soc/codecs/sigmadsp.c
@@ -124,18 +124,25 @@ int process_sigma_firmware(struct i2c_client *client, const char *name)
 	 * purposes and having the limit makes it easier to avoid integer
 	 * overflows later in the loading process.
 	 */
-	if (fw->size < sizeof(*ssfw_head) || fw->size >= 0x4000000)
+	if (fw->size < sizeof(*ssfw_head) || fw->size >= 0x4000000) {
+		dev_err(&client->dev, "Failed to load firmware: Invalid size\n");
 		goto done;
+	}
 
 	ssfw_head = (void *)fw->data;
-	if (memcmp(ssfw_head->magic, SIGMA_MAGIC, ARRAY_SIZE(ssfw_head->magic)))
+	if (memcmp(ssfw_head->magic, SIGMA_MAGIC, ARRAY_SIZE(ssfw_head->magic))) {
+		dev_err(&client->dev, "Failed to load firmware: Invalid magic\n");
 		goto done;
+	}
 
 	crc = crc32(0, fw->data + sizeof(*ssfw_head),
 			fw->size - sizeof(*ssfw_head));
 	pr_debug("%s: crc=%x\n", __func__, crc);
-	if (crc != le32_to_cpu(ssfw_head->crc))
+	if (crc != le32_to_cpu(ssfw_head->crc)) {
+		dev_err(&client->dev, "Failed to load firmware: Wrong crc checksum: expected %x got %x\n",
+			le32_to_cpu(ssfw_head->crc), crc);
 		goto done;
+	}
 
 	ssfw.pos = sizeof(*ssfw_head);
 
-- 
1.7.7.3


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