crypto: hisilicon/qm: modify loop exit condition

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7DUYJ
CVE: NA

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

Loop branch using 'i++' as condition will cause the loop to not execute
when 'i == 0', should use '++i', Fix it.

Fixes: 26f2f10d ("crypto: hisilicon/qm - obtain the mailbox
configuration at one time")
Fixes: aabdf15d ("vfio/migration: obtain the mailbox configuration at one
time")
Signed-off-by: NJiangShui Yang <yangjiangshui@h-partners.com>
Signed-off-by: NWeili Qian <qianweili@huawei.com>

drivers/crypto/hisilicon/migration/acc_vf_migration.c

@@ -104,7 +104,7 @@ static int qm_wait_mb_finish(struct hisi_qm *qm, struct qm_mailbox *mailbox)
 {
 	int i = 0;
 
-	while (i++) {
+	while (++i) {
 		qm_mb_read(qm, mailbox);
 		if (!((le16_to_cpu(mailbox->w0) >> QM_MB_BUSY_SHIFT) & 0x1))
 			break;

drivers/crypto/hisilicon/qm.c

@@ -666,7 +666,7 @@ static int qm_wait_mb_finish(struct hisi_qm *qm, struct qm_mailbox *mailbox)
 {
 	int i = 0;
 
-	while (i++) {
+	while (++i) {
 		qm_mb_read(qm, mailbox);
 		if (!((le16_to_cpu(mailbox->w0) >> QM_MB_BUSY_SHIFT) & 0x1))
 			break;