linux-kernel - [PATCH 5.4 201/348] ath10k: add missing error return code in ath10k_pci

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Message-Id: <20210712060728.131292587@linuxfoundation.org>
Date:   Mon, 12 Jul 2021 08:09:45 +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, Hulk Robot <hulkci@...wei.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 201/348] ath10k: add missing error return code in ath10k_pci_probe()

From: Yang Yingliang <yangyingliang@...wei.com>

[ Upstream commit e2783e2f39ba99178dedfc1646d5cc0979d1bab3 ]

When chip_id is not supported, the resources will be freed
on path err_unsupported, these resources will also be freed
when calling ath10k_pci_remove(), it will cause double free,
so return -ENODEV when it doesn't support the device with wrong
chip_id.

Fixes: c0c378f9907c ("ath10k: remove target soc ps code")
Fixes: 7505f7c3ec1d ("ath10k: create a chip revision whitelist")
Fixes: f8914a14623a ("ath10k: restore QCA9880-AR1A (v1) detection")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/20210522105822.1091848-3-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath10k/pci.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 53c791cc69a1..0f055e577749 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -3647,8 +3647,10 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
 			ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
 		if (bus_params.chip_id != 0xffffffff) {
 			if (!ath10k_pci_chip_is_supported(pdev->device,
-							  bus_params.chip_id))
+							  bus_params.chip_id)) {
+				ret = -ENODEV;
 				goto err_unsupported;
+			}
 		}
 	}
 
@@ -3659,11 +3661,15 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
 	}
 
 	bus_params.chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
-	if (bus_params.chip_id == 0xffffffff)
+	if (bus_params.chip_id == 0xffffffff) {
+		ret = -ENODEV;
 		goto err_unsupported;
+	}
 
-	if (!ath10k_pci_chip_is_supported(pdev->device, bus_params.chip_id))
+	if (!ath10k_pci_chip_is_supported(pdev->device, bus_params.chip_id)) {
+		ret = -ENODEV;
 		goto err_unsupported;
+	}
 
 	ret = ath10k_core_register(ar, &bus_params);
 	if (ret) {
-- 
2.30.2