[PATCH 5.15 353/371] mailbox: zynqmp: Fix IPI isr handling

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Tanmay Shah <tanmay.shah@xxxxxxx>

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: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller")
Signed-off-by: Tanmay Shah <tanmay.shah@xxxxxxx>
Acked-by: Michal Simek <michal.simek@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20230311012407.1292118-3-tanmay.shah@xxxxxxx
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/mailbox/zynqmp-ipi-mailbox.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/mailbox/zynqmp-ipi-mailbox.c
+++ b/drivers/mailbox/zynqmp-ipi-mailbox.c
@@ -152,7 +152,7 @@ static irqreturn_t zynqmp_ipi_interrupt(
 	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(
 				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;
 }
 
 /**





[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux