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From:   Xiongfeng Wang <wangxiongfeng2@huawei.com>
To:     <qianweili@huawei.com>, <wangzhou1@hisilicon.com>,
        <herbert@gondor.apana.org.au>
CC:     <linux-crypto@vger.kernel.org>, <wangxiongfeng2@huawei.com>,
        <yangyingliang@huawei.com>
Subject: [PATCH] crypto: hisilicon/qm - add missing pci_dev_put() in q_num_set()
Date:   Fri, 11 Nov 2022 18:00:36 +0800
Message-ID: <20221111100036.129685-1-wangxiongfeng2@huawei.com>
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Precedence: bulk

pci_get_device() will increase the reference count for the returned
pci_dev. We need to use pci_dev_put() to decrease the reference count
before q_num_set() returns.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
---
 include/linux/hisi_acc_qm.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/hisi_acc_qm.h b/include/linux/hisi_acc_qm.h
index e230c7c46110..c3618255b150 100644
--- a/include/linux/hisi_acc_qm.h
+++ b/include/linux/hisi_acc_qm.h
@@ -384,14 +384,14 @@ struct hisi_qp {
 static inline int q_num_set(const char *val, const struct kernel_param *kp,
 			    unsigned int device)
 {
-	struct pci_dev *pdev = pci_get_device(PCI_VENDOR_ID_HUAWEI,
-					      device, NULL);
+	struct pci_dev *pdev;
 	u32 n, q_num;
 	int ret;
 
 	if (!val)
 		return -EINVAL;
 
+	pdev = pci_get_device(PCI_VENDOR_ID_HUAWEI, device, NULL);
 	if (!pdev) {
 		q_num = min_t(u32, QM_QNUM_V1, QM_QNUM_V2);
 		pr_info("No device found currently, suppose queue number is %u\n",
@@ -401,6 +401,8 @@ static inline int q_num_set(const char *val, const struct kernel_param *kp,
 			q_num = QM_QNUM_V1;
 		else
 			q_num = QM_QNUM_V2;
+
+		pci_dev_put(pdev);
 	}
 
 	ret = kstrtou32(val, 10, &n);
-- 
2.20.1