[PATCH v3 1/2] crypto: bfin_crc: ignore duplicated registration of the same algorithm

[Sonic Zhang <sonic.adi@gmail.com>]

From: Sonic Zhang <sonic.zhang@analog.com>

in case of multiple crc devices are probed.
Call platform_set_drvdata() before adding new CRC device into the list.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
---
v3-change:
- check list_is_singular() before register the algorithm

 drivers/crypto/bfin_crc.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/crypto/bfin_crc.c b/drivers/crypto/bfin_crc.c
index cea3e8c..892b6d2 100644
--- a/drivers/crypto/bfin_crc.c
+++ b/drivers/crypto/bfin_crc.c
@@ -665,19 +665,19 @@ static int bfin_crypto_crc_probe(struct platform_device *pdev)
 	if (timeout == 0)
 		dev_info(&pdev->dev, "init crc poly timeout\n");
 
+	platform_set_drvdata(pdev, crc);
+
 	spin_lock(&crc_list.lock);
 	list_add(&crc->list, &crc_list.dev_list);
 	spin_unlock(&crc_list.lock);
 
-	platform_set_drvdata(pdev, crc);
-
-	ret = crypto_register_ahash(&algs);
-	if (ret) {
-		spin_lock(&crc_list.lock);
-		list_del(&crc->list);
-		spin_unlock(&crc_list.lock);
-		dev_err(&pdev->dev, "Cann't register crypto ahash device\n");
-		goto out_error_dma;
+	if (list_is_singular(&crc_list.dev_list)) {
+		ret = crypto_register_ahash(&algs);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"Cann't register crypto ahash device\n");
+			goto out_error_dma;
+		}
 	}
 
 	dev_info(&pdev->dev, "initialized\n");
-- 
1.8.2.3