linux-kernel - [PATCH 5.18 0313/1095] ath11k: fix IRQ affinity warning on shutdown

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Message-Id: <20220815180442.750719081@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:55:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Johan Hovold <johan+linaro@...nel.org>,
        Kalle Valo <quic_kvalo@...cinc.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0313/1095] ath11k: fix IRQ affinity warning on shutdown

From: Johan Hovold <johan+linaro@...nel.org>

[ Upstream commit 3bd0c69653ac636eae8872aacdcd4156f772f928 ]

Make sure to clear the IRQ affinity hint also on shutdown to avoid
triggering a WARN_ON_ONCE() in __free_irq() when stopping MHI while
using a single MSI vector.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

Fixes: e94b07493da3 ("ath11k: Set IRQ affinity to CPU0 in case of one MSI vector")
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
Signed-off-by: Kalle Valo <quic_kvalo@...cinc.com>
Link: https://lore.kernel.org/r/20220523143258.24818-1-johan+linaro@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath11k/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 8a3ff12057e8..e2382c8595b6 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -1566,7 +1566,9 @@ static void ath11k_pci_remove(struct pci_dev *pdev)
 static void ath11k_pci_shutdown(struct pci_dev *pdev)
 {
 	struct ath11k_base *ab = pci_get_drvdata(pdev);
+	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
 
+	ath11k_pci_set_irq_affinity_hint(ab_pci, NULL);
 	ath11k_pci_power_down(ab);
 }
 
-- 
2.35.1