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irqchip/qcom-mpm: Add missing mailbox TX done acknowledgment

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The mbox_client for qcom-mpm sends NULL doorbell messages via
mbox_send_message() but never signals TX completion.

Set knows_txdone=true and call mbox_client_txdone() after a successful
send, matching the pattern used by other Qualcomm mailbox clients (smp2p,
smsm, qcom_aoss etc).

Fixes: a6199bb514 "irqchip: Add Qualcomm MPM controller driver"
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260322171533.608436-1-jassisinghbrar@gmail.com
This commit is contained in:
Jassi Brar 2026-03-22 12:15:33 -05:00 committed by Thomas Gleixner
parent 6de23f81a5
commit cfe02147e8
1 changed files with 3 additions and 0 deletions
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3
drivers/irqchip/irq-qcom-mpm.c
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@ -306,6 +306,8 @@ static int mpm_pd_power_off(struct generic_pm_domain *genpd)
if (ret < 0)
return ret;
mbox_client_txdone(priv->mbox_chan, 0);
return 0;
}
@ -434,6 +436,7 @@ static int qcom_mpm_probe(struct platform_device *pdev, struct device_node *pare
}
priv->mbox_client.dev = dev;
priv->mbox_client.knows_txdone = true;
priv->mbox_chan = mbox_request_channel(&priv->mbox_client, 0);
if (IS_ERR(priv->mbox_chan)) {
ret = PTR_ERR(priv->mbox_chan);