crypto: ccree - prevent isr handling in case driver is suspended

ccree irq may be shared with other devices, in order to prevent ccree isr
handling while device maybe suspended we added a check to verify that the
device is not suspended.

Signed-off-by: Ofir Drang <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/ccree/cc_driver.c

···
 	u32 imr;
 
 	/* STAT_OP_TYPE_GENERIC STAT_PHASE_0: Interrupt */
+	/* if driver suspended return, probebly shared interrupt */
+	if (cc_pm_is_dev_suspended(dev))
+		return IRQ_NONE;
 
 	/* read the interrupt status */
 	irr = cc_ioread(drvdata, CC_REG(HOST_IRR));

drivers/crypto/ccree/cc_pm.c

···
 	return rc;
 }
 
+bool cc_pm_is_dev_suspended(struct device *dev)
+{
+	/* check device state using runtime api */
+	return pm_runtime_suspended(dev);
+}
+
 int cc_pm_init(struct cc_drvdata *drvdata)
 {
 	struct device *dev = drvdata_to_dev(drvdata);

drivers/crypto/ccree/cc_pm.h

···
 int cc_pm_resume(struct device *dev);
 int cc_pm_get(struct device *dev);
 int cc_pm_put_suspend(struct device *dev);
+bool cc_pm_is_dev_suspended(struct device *dev);
 
 #else
 
···
 static inline int cc_pm_put_suspend(struct device *dev)
 {
 	return 0;
+}
+
+static inline bool cc_pm_is_dev_suspended(struct device *dev)
+{
+	/* if PM not supported device is never suspend */
+	return false;
 }
 
 #endif