change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/drivers/firmware/arm_scmi/mailbox.c
..
..
@@ -52,6 +52,39 @@
52
52
 					   "#mbox-cells", idx, NULL);
53
53
 }
54
54
 
55
+static int mailbox_chan_validate(struct device *cdev)
56
+{
57
+	int num_mb, num_sh, ret = 0;
58
+	struct device_node *np = cdev->of_node;
59
+
60
+	num_mb = of_count_phandle_with_args(np, "mboxes", "#mbox-cells");
61
+	num_sh = of_count_phandle_with_args(np, "shmem", NULL);
62
+	/* Bail out if mboxes and shmem descriptors are inconsistent */
63
+	if (num_mb <= 0 || num_sh > 2 || num_mb != num_sh) {
64
+		dev_warn(cdev, "Invalid channel descriptor for '%s'\n",
65
+			 of_node_full_name(np));
66
+		return -EINVAL;
67
+	}
68
+
69
+	if (num_sh > 1) {
70
+		struct device_node *np_tx, *np_rx;
71
+
72
+		np_tx = of_parse_phandle(np, "shmem", 0);
73
+		np_rx = of_parse_phandle(np, "shmem", 1);
74
+		/* SCMI Tx and Rx shared mem areas have to be distinct */
75
+		if (!np_tx || !np_rx || np_tx == np_rx) {
76
+			dev_warn(cdev, "Invalid shmem descriptor for '%s'\n",
77
+				 of_node_full_name(np));
78
+			ret = -EINVAL;
79
+		}
80
+
81
+		of_node_put(np_tx);
82
+		of_node_put(np_rx);
83
+	}
84
+
85
+	return ret;
86
+}
87
+
55
88
 static int mailbox_chan_setup(struct scmi_chan_info *cinfo, struct device *dev,
56
89
 			      bool tx)
57
90
 {
..
..
@@ -64,6 +97,10 @@
64
97
 	resource_size_t size;
65
98
 	struct resource res;
66
99
 
100
+	ret = mailbox_chan_validate(cdev);
101
+	if (ret)
102
+		return ret;
103
+
67
104
 	smbox = devm_kzalloc(dev, sizeof(*smbox), GFP_KERNEL);
68
105
 	if (!smbox)
69
106
 		return -ENOMEM;