crypto: hisilicon - cleanup warning in qm_get_qos_value()

mainline inclusion
from mainline-v5.17-rc1
commit c5d692a2
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5AFY1
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5d692a2335d



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Building with clang static analysis returns this warning:

qm.c:4382:11: warning: The left operand of '==' is a garbage value
        if (*val == 0 || *val > QM_QOS_MAX_VAL || ret) {
            ~~~~ ^

The call to qm_qos_value_init() can return an error without setting
*val.  So check ret before checking *val.

Fixes: 72b010dc ("crypto: hisilicon/qm - supports writing QoS int the host")
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiangshui Yang <yangjiangshui@h-partners.com>
Reviewed-by: Yang Shen <shenyang39@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>