pcmcia: improve check for same card in slot after resume
During a suspend/resume cycle, an user may change the card in the
PCMCIA/CardBus slot. The pcmcia_core can at least look at the
socket state to check whether it is the same.
For PCMCIA devices, move the detection and handling of such a
change to ds.c.
For CardBus devices, the PCI hotplug interface doesn't offer a "rescan"
facility which also _removes_ devices no longer to be found behind a
bridge. Therefore, remove and re-add all devices unconditionally.
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index defa44c..87e0639 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -1252,8 +1252,22 @@
case CS_EVENT_EJECTION_REQUEST:
break;
- case CS_EVENT_PM_SUSPEND:
case CS_EVENT_PM_RESUME:
+ if (verify_cis_cache(skt) != 0) {
+ dev_dbg(&skt->dev, "cis mismatch - different card\n");
+ /* first, remove the card */
+ ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
+ destroy_cis_cache(skt);
+ kfree(skt->fake_cis);
+ skt->fake_cis = NULL;
+ /* now, add the new card */
+ ds_event(skt, CS_EVENT_CARD_INSERTION,
+ CS_EVENT_PRI_LOW);
+ }
+ handle_event(skt, event);
+ break;
+
+ case CS_EVENT_PM_SUSPEND:
case CS_EVENT_RESET_PHYSICAL:
case CS_EVENT_CARD_RESET:
default: