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| author |   Ofir Drang <ofir.drang@arm.com> | 2019-06-17 11:46:29 +0300 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2019-06-27 14:28:00 +0800 |
| commit | 3db617e77ae2f8051fd6f5d3fff0e15f086d5b4c (patch) | |
| tree | f44c64fa8ad02b19bd62575b3d5ba84ecd88c69a /drivers/crypto | |
| parent | crypto: ccree - check that cryptocell reset completed (diff) | |
| download | linux-dev-3db617e77ae2f8051fd6f5d3fff0e15f086d5b4c.tar.xz linux-dev-3db617e77ae2f8051fd6f5d3fff0e15f086d5b4c.zip | |
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 <ofir.drang@arm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccree/cc_driver.c | 3 | ||||
| -rw-r--r-- | drivers/crypto/ccree/cc_pm.c | 6 | ||||
| -rw-r--r-- | drivers/crypto/ccree/cc_pm.h | 7 |
3 files changed, 16 insertions, 0 deletions
diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c index 1e73d32148dd..667bc73d7a00 100644 --- a/drivers/crypto/ccree/cc_driver.c +++ b/drivers/crypto/ccree/cc_driver.c @@ -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)); diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c index 20f7f3d34e27..899a52f05b7a 100644 --- a/drivers/crypto/ccree/cc_pm.c +++ b/drivers/crypto/ccree/cc_pm.c @@ -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); diff --git a/drivers/crypto/ccree/cc_pm.h b/drivers/crypto/ccree/cc_pm.h index 6190cdba5dad..a7d98a5da2e1 100644 --- a/drivers/crypto/ccree/cc_pm.h +++ b/drivers/crypto/ccree/cc_pm.h @@ -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__*/ |