Merge tag 'rpmsg-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

Pull rpmsg updates from Bjorn Andersson:
 "The major part of the rpmsg changes for v5.18 relates to improvements
  in the rpmsg char driver, which now allow automatically attaching to
  rpmsg channels as well as initiating new communication channels from
  the Linux side.

  The SMD driver is moved to arch_initcall with the purpose of
  registering root clocks earlier during boot.

  Also in the SMD driver, a workaround for the resource power management
  (RPM) channel is introduced to resolve an issue where both the RPM and
  Linux side waits for the other to close the communication established
  by the bootloader - this unblocks support for clocks and regulators on
  some older Qualcomm platforms"

* tag 'rpmsg-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
  rpmsg: ctrl: Introduce new RPMSG_CREATE/RELEASE_DEV_IOCTL controls
  rpmsg: char: Introduce the "rpmsg-raw" channel
  rpmsg: char: Add possibility to use default endpoint of the rpmsg device
  rpmsg: char: Refactor rpmsg_chrdev_eptdev_create function
  rpmsg: Update rpmsg_chrdev_register_device function
  rpmsg: Move the rpmsg control device from rpmsg_char to rpmsg_ctrl
  rpmsg: Create the rpmsg class in core instead of in rpmsg char
  rpmsg: char: Export eptdev create and destroy functions
  rpmsg: char: treat rpmsg_trysend() ENOMEM as EAGAIN
  rpmsg: qcom_smd: Fix redundant channel->registered assignment
  rpmsg: use struct_size over open coded arithmetic
  rpmsg: smd: allow opening rpm_requests even if already opened
  rpmsg: qcom_smd: Promote to arch_initcall

Author: torvalds

drivers/rpmsg/Kconfig

@@ -15,6 +15,14 @@ config RPMSG_CHAR
 	  in /dev. They make it possible for user-space programs to send and
 	  receive rpmsg packets.
 
+config RPMSG_CTRL
+	tristate "RPMSG control interface"
+	depends on RPMSG && ( RPMSG_CHAR || RPMSG_CHAR=n )
+	help
+	  Say Y here to enable the support of the /dev/rpmsg_ctrlX API. This API
+	  allows user-space programs to create endpoints with specific service name,
+	  source and destination addresses.
+
 config RPMSG_NS
 	tristate "RPMSG name service announcement"
 	depends on RPMSG

drivers/rpmsg/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_RPMSG)		+= rpmsg_core.o
 obj-$(CONFIG_RPMSG_CHAR)	+= rpmsg_char.o
+obj-$(CONFIG_RPMSG_CTRL)	+= rpmsg_ctrl.o
 obj-$(CONFIG_RPMSG_NS)		+= rpmsg_ns.o
 obj-$(CONFIG_RPMSG_MTK_SCP)	+= mtk_rpmsg.o
 qcom_glink-objs			:= qcom_glink_native.o qcom_glink_ssr.o

drivers/rpmsg/qcom_glink_native.c

@@ -792,7 +792,7 @@ static int qcom_glink_rx_defer(struct qcom_glink *glink, size_t extra)
 		return -ENXIO;
 	}
 
-	dcmd = kzalloc(sizeof(*dcmd) + extra, GFP_ATOMIC);
+	dcmd = kzalloc(struct_size(dcmd, data, extra), GFP_ATOMIC);
 	if (!dcmd)
 		return -ENOMEM;
 
@@ -1715,7 +1715,7 @@ static int qcom_glink_create_chrdev(struct qcom_glink *glink)
 	rpdev->dev.parent = glink->dev;
 	rpdev->dev.release = qcom_glink_device_release;
 
-	return rpmsg_chrdev_register_device(rpdev);
+	return rpmsg_ctrldev_register_device(rpdev);
 }
 
 struct qcom_glink *qcom_glink_native_probe(struct device *dev,

drivers/rpmsg/qcom_smd.c

@@ -1113,7 +1113,7 @@ static int qcom_smd_create_chrdev(struct qcom_smd_edge *edge)
 	qsdev->rpdev.dev.parent = &edge->dev;
 	qsdev->rpdev.dev.release = qcom_smd_release_device;
 
-	return rpmsg_chrdev_register_device(&qsdev->rpdev);
+	return rpmsg_ctrldev_register_device(&qsdev->rpdev);
 }
 
 /*
@@ -1288,19 +1288,22 @@ static void qcom_channel_state_worker(struct work_struct *work)
 		if (channel->state != SMD_CHANNEL_CLOSED)
 			continue;
 
+		/*
+		 * Always open rpm_requests, even when already opened which is
+		 * required on some SoCs like msm8953.
+		 */
 		remote_state = GET_RX_CHANNEL_INFO(channel, state);
 		if (remote_state != SMD_CHANNEL_OPENING &&
-		    remote_state != SMD_CHANNEL_OPENED)
+		    remote_state != SMD_CHANNEL_OPENED &&
+		    strcmp(channel->name, "rpm_requests"))
 			continue;
 
 		if (channel->registered)
 			continue;
 
 		spin_unlock_irqrestore(&edge->channels_lock, flags);
 		qcom_smd_create_device(channel);
-		channel->registered = true;
 		spin_lock_irqsave(&edge->channels_lock, flags);
-
 		channel->registered = true;
 	}
 
@@ -1605,7 +1608,7 @@ static int __init qcom_smd_init(void)
 {
 	return platform_driver_register(&qcom_smd_driver);
 }
-subsys_initcall(qcom_smd_init);
+arch_initcall(qcom_smd_init);
 
 static void __exit qcom_smd_exit(void)
 {