Commit 3db2c886 authored by Xiongfeng Wang's avatar Xiongfeng Wang Committed by JiangShui
Browse files

crypto: hisilicon/qm - add missing pci_dev_put() in q_num_set() 

mainline inclusion
from mainline-v6.2-rc1
commit cc7710d0
category: bugfix
bugzilla: https://gitee/com/openeuler/kernel/issues/16VW8E
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc7710d0d4ebc6998f04035cde4f32c5ddbe9d7f



-------------------------------------------------------------------

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: c8b4b477 ("crypto: hisilicon - add HiSilicon HPRE accelerator")
Signed-off-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: default avatarWeili Qian <qianweili@huawei.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarJangShui <yangjiangshui@h-partners.com>
parent 9895e9ad

include/linux/hisi_acc_qm.h

+4 −2
Original line number Diff line number Diff line
@@ -385,14 +385,14 @@ 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",
@@ -402,6 +402,8 @@ 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);