4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Srinivas Kandagatla <[email protected]> [ Upstream commit fe782affd0f440a4e60e2cc81b8f2eccb2923113 ] Some of the rpmsg devices need to switch on power domains to communicate with remote processor. For example on Qualcomm DB820c platform LPASS power domain needs to switched on for any kind of audio services. This patch adds the missing power domain support in rpmsg core. Without this patch attempting to play audio via QDSP on DB820c would reboot the system. Signed-off-by: Srinivas Kandagatla <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/rpmsg/rpmsg_core.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -23,6 +23,7 @@ #include <linux/module.h> #include <linux/rpmsg.h> #include <linux/of_device.h> +#include <linux/pm_domain.h> #include <linux/slab.h> #include "rpmsg_internal.h" @@ -418,6 +419,10 @@ static int rpmsg_dev_probe(struct device struct rpmsg_endpoint *ept = NULL; int err; + err = dev_pm_domain_attach(dev, true); + if (err) + goto out; + if (rpdrv->callback) { strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE); chinfo.src = rpdev->src; @@ -459,6 +464,8 @@ static int rpmsg_dev_remove(struct devic rpdrv->remove(rpdev); + dev_pm_domain_detach(dev, true); + if (rpdev->ept) rpmsg_destroy_ept(rpdev->ept);
