From: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Date: Thu, 2 Jun 2011 18:10:13 +0000 (+0300)
Subject: crypto: omap-sham - do not schedule tasklet if there is no active requests
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cd3f1d545c45489c88fbc71a82559664b8bf0bb2;p=linux-beck.git

crypto: omap-sham - do not schedule tasklet if there is no active requests

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 804c16bc2d61..6399a8f1938a 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -1085,6 +1085,11 @@ static irqreturn_t omap_sham_irq(int irq, void *dev_id)
 				 SHA_REG_CTRL_OUTPUT_READY);
 	omap_sham_read(dd, SHA_REG_CTRL);
 
+	if (!test_bit(FLAGS_BUSY, &dd->flags)) {
+		dev_warn(dd->dev, "Interrupt when no active requests.\n");
+		return IRQ_HANDLED;
+	}
+
 	set_bit(FLAGS_OUTPUT_READY, &dd->flags);
 	tasklet_schedule(&dd->done_task);