r8152: fix the firmware doesn't work

generic_ocp_write() asks the parameter "size" must be 4 bytes align.
Therefore, write the bp would fail, if the mac->bp_num is odd. Align the
size to 4 for fixing it. The way may write an extra bp, but the
rtl8152_is_fw_mac_ok() makes sure the value must be 0 for the bp whose
index is more than mac->bp_num. That is, there is no influence for the
firmware.

Besides, I check the return value of generic_ocp_write() to make sure
everything is correct.

Fixes: e5c266a ("r8152: set bp in bulk")
Signed-off-by: Hayes Wang <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: hayesorz

drivers/net/usb/r8152.c

@@ -5178,14 +5178,23 @@ static void rtl8152_fw_mac_apply(struct r8152 *tp, struct fw_mac *mac)
 	data = (u8 *)mac;
 	data += __le16_to_cpu(mac->fw_offset);
 
-	generic_ocp_write(tp, __le16_to_cpu(mac->fw_reg), 0xff, length, data,
-			  type);
+	if (generic_ocp_write(tp, __le16_to_cpu(mac->fw_reg), 0xff, length,
+			      data, type) < 0) {
+		dev_err(&tp->intf->dev, "Write %s fw fail\n",
+			type ? "PLA" : "USB");
+		return;
+	}
 
 	ocp_write_word(tp, type, __le16_to_cpu(mac->bp_ba_addr),
 		       __le16_to_cpu(mac->bp_ba_value));
 
-	generic_ocp_write(tp, __le16_to_cpu(mac->bp_start), BYTE_EN_DWORD,
-			  __le16_to_cpu(mac->bp_num) << 1, mac->bp, type);
+	if (generic_ocp_write(tp, __le16_to_cpu(mac->bp_start), BYTE_EN_DWORD,
+			      ALIGN(__le16_to_cpu(mac->bp_num) << 1, 4),
+			      mac->bp, type) < 0) {
+		dev_err(&tp->intf->dev, "Write %s bp fail\n",
+			type ? "PLA" : "USB");
+		return;
+	}
 
 	bp_en_addr = __le16_to_cpu(mac->bp_en_addr);
 	if (bp_en_addr)