tifm_sd: restructure initialization, removal and command handling

In order to support correct suspend and resume several changes were needed:
1. Switch from work_struct to tasklet for command handling. When device
suspend is called workqueues are already frozen and can not be used.
2. Separate host initialization code from driver's probe and don't rely
on interrupts for host initialization. This, in turn, addresses two
problems:
 a) Resume needs to re-initialize the host, but can not assume that
    device interrupts were already re-armed.
 b) Previously, probe will return successfully before really knowing
    the state of the host, as host interrupts were not armed in time.
    Now it uses polling to determine the real host state before returning.
3. Separate termination code from driver's remove. Termination may be caused
by resume, if media changed type or became unavailable during suspend.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 2 insertions, 3 deletions

diff --git a/include/linux/tifm.h b/include/linux/tifm.h
index dfb8052eee5e..9caa28e2a63c 100644
--- a/include/linux/tifm.h
+++ b/include/linux/tifm.h
@@ -89,8 +89,7 @@ struct tifm_dev {
         char __iomem            *addr;
         spinlock_t              lock;
         tifm_media_id           media_id;
-        char                    wq_name[KOBJ_NAME_LEN];
-        struct workqueue_struct *wq;
+        unsigned int            socket_id;
 
         unsigned int            (*signal_irq)(struct tifm_dev *sock,
                                               unsigned int sock_irq_status);
@@ -132,7 +131,7 @@ void tifm_free_device(struct device *dev);
 void tifm_free_adapter(struct tifm_adapter *fm);
 int tifm_add_adapter(struct tifm_adapter *fm);
 void tifm_remove_adapter(struct tifm_adapter *fm);
-struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id);
+struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm);
 int tifm_register_driver(struct tifm_driver *drv);
 void tifm_unregister_driver(struct tifm_driver *drv);
 void tifm_eject(struct tifm_dev *sock);