Commit dc81d1d4 authored by Weili Qian's avatar Weili Qian Committed by Zheng Zengkai
Browse files

crypto: hisilicon/qm - fix missing put dfx access 

mainline inclusion
from mainline-v6.1-rc1
commit 5afc904f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5T7AD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5afc904f443de2afd31c4e0686ba178beede86fe



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

In function qm_cmd_write(), if function returns from
branch 'atomic_read(&qm->status.flags) == QM_STOP',
the got dfx access is forgotten to put.

Fixes: 607c191b ("crypto: hisilicon - support runtime PM for accelerator device")
Signed-off-by: default avatarWeili Qian <qianweili@huawei.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarJiangshui Yang <yangjiangshui@h-partners.com>
Reviewed-by: default avatarXiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: default avatarYang Shen <shenyang39@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 12534fce

drivers/crypto/hisilicon/qm.c

+4 −2
Original line number Diff line number Diff line
@@ -2216,8 +2216,10 @@ static ssize_t qm_cmd_write(struct file *filp, const char __user *buffer, 
		return ret;



	/* Judge if the instance is being reset. */

	if (unlikely(atomic_read(&qm->status.flags) == QM_STOP))

		return 0;

	if (unlikely(atomic_read(&qm->status.flags) == QM_STOP)) {

		ret = 0;

		goto put_dfx_access;

	}



	if (count > QM_DBG_WRITE_LEN) {

		ret = -ENOSPC;