crypto: hisilicon/qm - return failure if vfs_num exceeds total VFs

The accelerator drivers supports users to enable VFs through the
module parameter 'vfs_num'. If the number of VFs to be enabled
exceeds the total VFs, all VFs are enabled. Change it to the same
as enabling VF through the 'sriov_numvfs' file. Returns -ERANGE
if the number of VFs to be enabled exceeds total VFs.
Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hisilicon/qm.c

@@ -4766,7 +4766,13 @@ int hisi_qm_sriov_enable(struct pci_dev *pdev, int max_vfs)
 		goto err_put_sync;
 	}
 
-	num_vfs = min_t(int, max_vfs, total_vfs);
+	if (max_vfs > total_vfs) {
+		pci_err(pdev, "%d VFs is more than total VFs %d!\n", max_vfs, total_vfs);
+		ret = -ERANGE;
+		goto err_put_sync;
+	}
+
+	num_vfs = max_vfs;
 	ret = qm_vf_q_assign(qm, num_vfs);
 	if (ret) {
 		pci_err(pdev, "Can't assign queues for VF!\n");