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

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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 <ofir.drang@arm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ofir Drang 2019-06-17 11:46:29 +03:00 committed by Herbert Xu
parent d84f6269ce
commit 3db617e77a
3 changed files with 16 additions and 0 deletions
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3
drivers/crypto/ccree/cc_driver.c
View File

@ -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));

6
drivers/crypto/ccree/cc_pm.c
View File

@ -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);

7
drivers/crypto/ccree/cc_pm.h
View File

@ -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__*/