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Date:   Wed, 29 Nov 2017 17:21:54 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Krzysztof Kozlowski <krzk@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.4 25/32] crypto: s5p-sss - Fix completing crypto
 request in IRQ handler

From: Krzysztof Kozlowski <krzk@...nel.org>

[ Upstream commit 07de4bc88ce6a4d898cad9aa4c99c1df7e87702d ]

In a regular interrupt handler driver was finishing the crypt/decrypt
request by calling complete on crypto request.  This is disallowed since
converting to skcipher in commit b286d8b1a690 ("crypto: skcipher - Add
skcipher walk interface") and causes a warning:
	WARNING: CPU: 0 PID: 0 at crypto/skcipher.c:430 skcipher_walk_first+0x13c/0x14c

The interrupt is marked shared but in fact there are no other users
sharing it.  Thus the simplest solution seems to be to just use a
threaded interrupt handler, after converting it to oneshot.

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/crypto/s5p-sss.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index f214a8755827..fd39893079d5 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -664,8 +664,9 @@ static int s5p_aes_probe(struct platform_device *pdev)
 		dev_warn(dev, "feed control interrupt is not available.\n");
 		goto err_irq;
 	}
-	err = devm_request_irq(dev, pdata->irq_fc, s5p_aes_interrupt,
-			       IRQF_SHARED, pdev->name, pdev);
+	err = devm_request_threaded_irq(dev, pdata->irq_fc, NULL,
+					s5p_aes_interrupt, IRQF_ONESHOT,
+					pdev->name, pdev);
 	if (err < 0) {
 		dev_warn(dev, "feed control interrupt is not available.\n");
 		goto err_irq;
-- 
2.11.0

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