mmc: deprecate mmc bus topology
The classic MMC bus was defined as multi card bus
system, which is reflected in the design in the MMC
layer.
When SD showed up, the bus topology was abandoned
and a star topology (one card per host) was mandated.
MMC version 4 has followed this, officially deprecating
the bus topology.
As we do not have any known users of the bus
topology we can remove support for it. This will
simplify the code and rectify some incorrect
assumptions in the newer additions.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 1ca5054..7d98990 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -61,7 +61,6 @@
* MMC device
*/
struct mmc_card {
- struct list_head node; /* node in hosts devices list */
struct mmc_host *host; /* the host this device belongs to */
struct device dev; /* the device */
unsigned int rca; /* relative card address of device */
@@ -123,11 +122,4 @@
extern int mmc_register_driver(struct mmc_driver *);
extern void mmc_unregister_driver(struct mmc_driver *);
-static inline int mmc_card_claim_host(struct mmc_card *card)
-{
- return __mmc_claim_host(card->host, card);
-}
-
-#define mmc_card_release_host(c) mmc_release_host((c)->host)
-
#endif
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 92efe8e..6ea3c0e 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -138,14 +138,12 @@
#define MMC_MODE_MMC 0
#define MMC_MODE_SD 1
- struct list_head cards; /* devices attached to this host */
+ struct mmc_card *card; /* device attached to this host */
wait_queue_head_t wq;
spinlock_t lock; /* claimed lock */
unsigned int claimed:1; /* host exclusively claimed */
- struct mmc_card *card_selected; /* the selected MMC card */
-
struct delayed_work detect;
#ifdef CONFIG_MMC_DEBUG
unsigned int removed:1; /* host is being removed */
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index cdc54be..b3d80ef 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -8,7 +8,6 @@
#ifndef MMC_H
#define MMC_H
-#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/device.h>
@@ -107,13 +106,7 @@
extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int);
-extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card);
-
-static inline void mmc_claim_host(struct mmc_host *host)
-{
- __mmc_claim_host(host, (struct mmc_card *)-1);
-}
-
+extern void mmc_claim_host(struct mmc_host *host);
extern void mmc_release_host(struct mmc_host *host);
#endif