[PATCH v45 6/7] synchronize IRQ before releasing shared memory
COLD53d
From: Adam Young <hidden>
Date: 2026-07-21 17:53:29
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Subsystem:
acpi pcc(platform communication channel) mailbox driver, mailbox api, the rest · Maintainers:
Sudeep Holla, Jassi Brar, Linus Torvalds
Make sure a final interrupt request does not asccess the shared buffer after it has been release. Signed-off-by: Adam Young <redacted> --- drivers/mailbox/pcc.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index b9a01bfdc95d..2ce2afd255f0 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c@@ -537,6 +537,7 @@ static void pcc_shutdown(struct mbox_chan *chan) if (pchan->plat_irq > 0) devm_free_irq(chan->mbox->dev, pchan->plat_irq, chan); + synchronize_irq(pchan->plat_irq); pcc_mbox_chan = &pchan->chan; if (pcc_mbox_chan->shmem) {
--
2.43.0