This is a note to let you know that I've just added the patch titled
mailbox: zynqmp: Fix IPI isr handling
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mailbox-zynqmp-fix-ipi-isr-handling.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 74ad37a30ffee3643bc34f9ca7225b20a66abaaf Mon Sep 17 00:00:00 2001
From: Tanmay Shah <tanmay.shah@xxxxxxx>
Date: Fri, 10 Mar 2023 17:24:05 -0800
Subject: mailbox: zynqmp: Fix IPI isr handling
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;
}
/**
Patches currently in stable-queue which might be from tanmay.shah@xxxxxxx are
queue-6.2/mailbox-zynqmp-fix-typo-in-ipi-documentation.patch
queue-6.2/drivers-remoteproc-xilinx-fix-carveout-names.patch
queue-6.2/mailbox-zynqmp-fix-ipi-isr-handling.patch
