wifi: ray_cs: add sanity check on local->sram/rmem/amem

The ray_config uses ray_release as its unified error handling function.
However, it does not know if local->sram/rmem/amem succeeds or not.

Fix this by adding sanity check on local->sram/rmem/amem in the
ray_relase.
Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230316133236.556198-3-dzm91@hust.edu.cn

drivers/net/wireless/legacy/ray_cs.c

@@ -738,9 +738,12 @@ static void ray_release(struct pcmcia_device *link)
 
 	del_timer_sync(&local->timer);
 
-	iounmap(local->sram);
-	iounmap(local->rmem);
-	iounmap(local->amem);
+	if (local->sram)
+		iounmap(local->sram);
+	if (local->rmem)
+		iounmap(local->rmem);
+	if (local->amem)
+		iounmap(local->amem);
 	pcmcia_disable_device(link);
 
 	dev_dbg(&link->dev, "ray_release ending\n");