Applied to drm-misc-next
On 11/13/25 07:22, Falkowski, Maciej wrote:
Reviewed-by: Maciej Falkowski <[email protected]>
On 11/7/2025 7:11 PM, Lizhi Hou wrote:
The mailbox interrupt register is not always cleared when a mailbox
channel
is created. This can leave stale interrupt states from previous
operations.
Fix this by explicitly clearing the interrupt register in the mailbox
channel creation function.
Fixes: b87f920b9344 ("accel/amdxdna: Support hardware mailbox")
Signed-off-by: Lizhi Hou <[email protected]>
---
drivers/accel/amdxdna/amdxdna_mailbox.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/accel/amdxdna/amdxdna_mailbox.c
b/drivers/accel/amdxdna/amdxdna_mailbox.c
index 24258dcc18eb..858df97cd3fb 100644
--- a/drivers/accel/amdxdna/amdxdna_mailbox.c
+++ b/drivers/accel/amdxdna/amdxdna_mailbox.c
@@ -516,6 +516,7 @@ xdna_mailbox_create_channel(struct mailbox *mb,
}
mb_chann->bad_state = false;
+ mailbox_reg_write(mb_chann, mb_chann->iohub_int_addr, 0);
MB_DBG(mb_chann, "Mailbox channel created (irq: %d)",
mb_chann->msix_irq);
return mb_chann;
