[PATCH v4] remoteproc: Add device awake calls in rproc boot and shutdown path

[Souradeep Chowdhury]

Add device awake calls in case of rproc boot and rproc shutdown path.
Currently, device awake call is only present in the recovery path
of remoteproc. If a user stops and starts rproc by using the sysfs
interface, then on pm suspension the firmware loading fails as the
request_firmware call under adsp_load returns failure. Add device
awake calls to fix this.

Signed-off-by: Souradeep Chowdhury <quic_schow...@quicinc.com>
---
Changes in v4

*Remove stability from mailing list
*Remove the extra tab in v3
*Change the commit description

 drivers/remoteproc/remoteproc_core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c 
b/drivers/remoteproc/remoteproc_core.c
index c2cf0d277729..5d6c4e694b4c 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1917,6 +1917,7 @@ int rproc_boot(struct rproc *rproc)
                return -EINVAL;
        }
 
+       pm_stay_awake(rproc->dev.parent);
        dev = &rproc->dev;
 
        ret = mutex_lock_interruptible(&rproc->lock);
@@ -1961,6 +1962,7 @@ int rproc_boot(struct rproc *rproc)
                atomic_dec(&rproc->power);
 unlock_mutex:
        mutex_unlock(&rproc->lock);
+       pm_relax(rproc->dev.parent);
        return ret;
 }
 EXPORT_SYMBOL(rproc_boot);
@@ -1991,6 +1993,7 @@ int rproc_shutdown(struct rproc *rproc)
        struct device *dev = &rproc->dev;
        int ret = 0;
 
+       pm_stay_awake(rproc->dev.parent);
        ret = mutex_lock_interruptible(&rproc->lock);
        if (ret) {
                dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret);
@@ -2027,6 +2030,7 @@ int rproc_shutdown(struct rproc *rproc)
        rproc->table_ptr = NULL;
 out:
        mutex_unlock(&rproc->lock);
+       pm_relax(rproc->dev.parent);
        return ret;
 }
 EXPORT_SYMBOL(rproc_shutdown);
-- 
2.34.1