Commit 3db617e7 authored by Ofir Drang's avatar Ofir Drang Committed by Herbert Xu
Browse files

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: default avatarOfir Drang <ofir.drang@arm.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent d84f6269

drivers/crypto/ccree/cc_driver.c

+3 −0
Original line number Diff line number Diff line
@@ -134,6 +134,9 @@ static irqreturn_t cc_isr(int irq, void *dev_id) 
	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

+6 −0
Original line number Diff line number Diff line
@@ -106,6 +106,12 @@ int cc_pm_put_suspend(struct device *dev) 
	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

+7 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ int cc_pm_suspend(struct device *dev); 
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
@@ -54,6 +55,12 @@ 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



#endif /*__POWER_MGR_H__*/

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