From cc7710d0d4ebc6998f04035cde4f32c5ddbe9d7f Mon Sep 17 00:00:00 2001
From: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Date: Fri, 11 Nov 2022 18:00:36 +0800
Subject: [PATCH] crypto: hisilicon/qm - add missing pci_dev_put() in q_num_set()
Git-commit: cc7710d0d4ebc6998f04035cde4f32c5ddbe9d7f
Patch-mainline: v6.2-rc1
References: git-fixes
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.
Fixes: c8b4b477079d ("crypto: hisilicon - add HiSilicon HPRE accelerator")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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);
--
2.35.3