tifm: fix memorystick host initialization code

Instead of assuming that host is powered on only once at card insertion, allow
for the possibility that memstick layer may need to cycle card's power to get
it out from some unhealthy states.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/memstick/host/tifm_ms.c

@@ -496,7 +496,18 @@ static void tifm_ms_set_param(struct memstick_host *msh,
 
 	switch (param) {
 	case MEMSTICK_POWER:
-		/* this is set by card detection mechanism */
+		/* also affected by media detection mechanism */
+		if (value == MEMSTICK_POWER_ON) {
+			host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
+			writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
+			writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
+			       sock->addr + SOCK_MS_SYSTEM);
+			writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
+		} else if (value == MEMSTICK_POWER_OFF) {
+			writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
+			       sock->addr + SOCK_MS_SYSTEM);
+			writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
+		}
 		break;
 	case MEMSTICK_INTERFACE:
 		if (value == MEMSTICK_SERIAL) {
@@ -531,22 +542,6 @@ static void tifm_ms_abort(unsigned long data)
 	tifm_eject(host->dev);
 }
 
-static int tifm_ms_initialize_host(struct tifm_ms *host)
-{
-	struct tifm_dev *sock = host->dev;
-	struct memstick_host *msh = tifm_get_drvdata(sock);
-
-	host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
-	writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
-	writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
-	       sock->addr + SOCK_MS_SYSTEM);
-	writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
-	if (tifm_has_ms_pif(sock))
-		msh->caps |= MEMSTICK_CAP_PAR4;
-
-	return 0;
-}
-
 static int tifm_ms_probe(struct tifm_dev *sock)
 {
 	struct memstick_host *msh;
@@ -575,10 +570,10 @@ static int tifm_ms_probe(struct tifm_dev *sock)
 	msh->set_param = tifm_ms_set_param;
 	sock->card_event = tifm_ms_card_event;
 	sock->data_event = tifm_ms_data_event;
-	rc = tifm_ms_initialize_host(host);
+	if (tifm_has_ms_pif(sock))
+		msh->caps |= MEMSTICK_CAP_PAR4;
 
-	if (!rc)
-		rc = memstick_add_host(msh);
+	rc = memstick_add_host(msh);
 	if (!rc)
 		return 0;
 
@@ -616,11 +611,6 @@ static void tifm_ms_remove(struct tifm_dev *sock)
 	spin_unlock_irqrestore(&sock->lock, flags);
 
 	memstick_remove_host(msh);
-
-	writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
-	       sock->addr + SOCK_MS_SYSTEM);
-	writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
-
 	memstick_free_host(msh);
 }