mmc: core: Fix kernel panic when remove non-standard SDIO card

SDIO tuple is only allocated for standard SDIO card, especially it causes
memory corruption issues when the non-standard SDIO card has removed, which
is because the card device's reference counter does not increase for it at
sdio_init_func(), but all SDIO card device reference counter gets decreased
at sdio_release_func().

Fixes: 6f51be3 ("sdio: allow non-standard SDIO cards")
Signed-off-by: Matthew Ma <[email protected]>
Reviewed-by: Weizhao Ouyang <[email protected]>
Reviewed-by: John Wang <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

Author: Matthew Ma

drivers/mmc/core/sdio_bus.c

@@ -291,7 +291,8 @@ static void sdio_release_func(struct device *dev)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
 
-	sdio_free_func_cis(func);
+	if (!(func->card->quirks & MMC_QUIRK_NONSTD_SDIO))
+		sdio_free_func_cis(func);
 
 	kfree(func->info);
 	kfree(func->tmpbuf);