6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lizhi Hou lizhi.hou@amd.com
[ Upstream commit 6ff9385c07aa311f01f87307e6256231be7d8675 ]
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") Reviewed-by: Maciej Falkowski maciej.falkowski@linux.intel.com Signed-off-by: Lizhi Hou lizhi.hou@amd.com Link: https://patch.msgid.link/20251107181115.1293158-1-lizhi.hou@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 da1ac89bb78f1..6634a4d5717ff 100644 --- a/drivers/accel/amdxdna/amdxdna_mailbox.c +++ b/drivers/accel/amdxdna/amdxdna_mailbox.c @@ -513,6 +513,7 @@ 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;