Merge tag 'rproc-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

Pull remoteproc updates from Bjorn Andersson:

 - Unnecessary type casts from the 'void *' rproc->priv pointer are
   dropped throughout the subsystem.

 - A kernel-doc error is corrected in the Mediatek SCPI IPI
   implementation

 - The firmware loading onto the IMX DSP remote processors is reworked
   to avoid non-32bit memory operations. A module parameter is
   introduced to assist development of firmware without communication
   abilities in place. Error paths in imx_dsp_rproc_mbox_alloc() is
   cleaned up

 - The cluster configuration handling in the TI K3 R5 driver is
   corrected and support for the single-R5 core found in the TI AM62x
   SoC family is introduced

 - The TI PRU driver device- to virtual-address translation is updated
   to avoid compiler warning about the unsigned device-address always
   being larger than 0

 - The ST remoteproc driver is transitioned to use of_property_present()

 - Issues with kicks arriving after the STM32 remote processor has been
   shut down are mitigated by checking the processor's state before
   handling them.

 - Support for mailbox channels for communication with the remote
   processors are added to the Xilinx R5 remoteproc driver. The naming
   of carveouts are corrected and their parsing is reworked. For this a
   couple of fixes targeting the mailbox subsystem are picked up here as
   well.

 - Reference counting of of_nodes are corrected in the ST, STM32, RCAR
   and IMX remoteproc drivers

* tag 'rproc-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: (24 commits)
  remoteproc: st: Use of_property_present() for testing DT property presence
  dt-bindings: remoteproc: Drop unneeded quotes
  remoteproc: imx_dsp_rproc: Fix kernel test robot sparse warning
  remoteproc: imx_dsp_rproc: Improve exception handling in imx_dsp_rproc_mbox_alloc()
  remoteproc: pru: Remove always true check positive unsigned value
  dt-bindings: remoteproc: stm32-rproc: Typo fix
  remoteproc: stm32_rproc: Add mutex protection for workqueue
  remoteproc: Remove unnecessary (void*) conversions
  remoteproc: imx_dsp_rproc: Call of_node_put() on iteration error
  remoteproc: imx_rproc: Call of_node_put() on iteration error
  remoteproc: rcar_rproc: Call of_node_put() on iteration error
  remoteproc: st: Call of_node_put() on iteration error
  remoteproc: stm32: Call of_node_put() on iteration error
  remoteproc: k3-r5: Use separate compatible string for TI AM62x SoC family
  dt-bindings: remoteproc: ti: Add new compatible for AM62 SoC family
  remoteproc: k3-r5: Simplify cluster mode setting usage
  remoteproc/mtk_scpi_ipi: Fix one kernel-doc comment
  remoteproc: xilinx: Add mailbox channels for rpmsg
  drivers: remoteproc: xilinx: Fix carveout names
  mailbox: zynqmp: Fix typo in IPI documentation
  ...

1 files changed, 9 insertions, 4 deletions

diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c b/drivers/mailbox/zynqmp-ipi-mailbox.c
index a4c8d23c76e218..d097f45b0e5f5c 100644
--- a/drivers/mailbox/zynqmp-ipi-mailbox.c
+++ b/drivers/mailbox/zynqmp-ipi-mailbox.c
@@ -152,7 +152,7 @@ static irqreturn_t zynqmp_ipi_interrupt(int irq, void *data)
 	struct zynqmp_ipi_message *msg;
 	u64 arg0, arg3;
 	struct arm_smccc_res res;
-	int ret, i;
+	int ret, i, status = IRQ_NONE;
 
 	(void)irq;
 	arg0 = SMC_IPI_MAILBOX_STATUS_ENQUIRY;
@@ -170,11 +170,11 @@ static irqreturn_t zynqmp_ipi_interrupt(int irq, void *data)
 				memcpy_fromio(msg->data, mchan->req_buf,
 					      msg->len);
 				mbox_chan_received_data(chan, (void *)msg);
-				return IRQ_HANDLED;
+				status = IRQ_HANDLED;
 			}
 		}
 	}
-	return IRQ_NONE;
+	return status;
 }
 
 /**
@@ -634,7 +634,12 @@ static int zynqmp_ipi_probe(struct platform_device *pdev)
 	struct zynqmp_ipi_mbox *mbox;
 	int num_mboxes, ret = -EINVAL;
 
-	num_mboxes = of_get_child_count(np);
+	num_mboxes = of_get_available_child_count(np);
+	if (num_mboxes == 0) {
+		dev_err(dev, "mailbox nodes not available\n");
+		return -EINVAL;
+	}
+
 	pdata = devm_kzalloc(dev, struct_size(pdata, ipi_mboxes, num_mboxes),
 			     GFP_KERNEL);
 	if (!pdata)