pcmcia: preserve configuration information if request_io fails partly
Dominik Brodowski [Sat, 18 Sep 2010 08:19:13 +0000 (10:19 +0200)]
If pcmcia_request_io() only fails partly -- for the second of two
requested resources -- preserve the configuration settings for the
first one.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/pcmcia_resource.c

index a5c1765..9ba4dad 100644 (file)
@@ -595,7 +595,13 @@ int pcmcia_request_io(struct pcmcia_device *p_dev)
        if (c->io[1].end) {
                ret = alloc_io_space(s, &c->io[1], p_dev->io_lines);
                if (ret) {
+                       struct resource tmp = c->io[0];
+                       /* release the previously allocated resource */
                        release_io_space(s, &c->io[0]);
+                       /* but preserve the settings, for they worked... */
+                       c->io[0].end = resource_size(&tmp);
+                       c->io[0].start = tmp.start;
+                       c->io[0].flags = tmp.flags;
                        goto out;
                }
        } else