Commit 38afc633 authored Mar 10, 2023 by Tanmay Shah Committed by Greg Kroah-Hartman May 17, 2023

mailbox: zynqmp: Fix IPI isr handling



commit 74ad37a30ffee3643bc34f9ca7225b20a66abaaf upstream.

Multiple IPI channels are mapped to same interrupt handler.
Current isr implementation handles only one channel per isr.
Fix this behavior by checking isr status bit of all child
mailbox nodes.

Fixes: 4981b82b ("mailbox: ZynqMP IPI mailbox controller")
Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230311012407.1292118-3-tanmay.shah@amd.com


Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 14964127

drivers/mailbox/zynqmp-ipi-mailbox.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -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;
		}

		/**