ipmi: Skip channel scan if channels are already marked ready

Channels remain static unless the BMC firmware changes.
Therefore, rescanning is unnecessary while they are marked
ready and no BMC update has occurred.

Signed-off-by: Jinhui Guo <guojinhui.liam@bytedance.com>
Message-ID: <20250930074239.2353-4-guojinhui.liam@bytedance.com>
Signed-off-by: Corey Minyard <corey@minyard.net>

Author: guojinhui-liam

drivers/char/ipmi/ipmi_msghandler.c

@@ -3450,6 +3450,10 @@ static int __scan_channels(struct ipmi_smi *intf,
 		intf->channels_ready = false;
 	}
 
+	/* Skip channel scan if channels are already marked ready */
+	if (intf->channels_ready)
+		return 0;
+
 	if (ipmi_version_major(id) > 1
 			|| (ipmi_version_major(id) == 1
 			    && ipmi_version_minor(id) >= 5)) {