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authorOfir Drang <ofir.drang@arm.com>2019-06-17 11:46:29 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-06-27 14:28:00 +0800
commit3db617e77ae2f8051fd6f5d3fff0e15f086d5b4c (patch)
treef44c64fa8ad02b19bd62575b3d5ba84ecd88c69a /drivers/crypto/ccree
parentd84f6269ce24eb4c468e246b24fc0fdce34ab6f6 (diff)
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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/ccree')
-rw-r--r--drivers/crypto/ccree/cc_driver.c3
-rw-r--r--drivers/crypto/ccree/cc_pm.c6
-rw-r--r--drivers/crypto/ccree/cc_pm.h7
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__*/