mmc: be more verbose about card insertions/removal

Let the user know that the kernel actually detected the card
by printing some basic information in dmesg.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

drivers/mmc/core/bus.c

@@ -209,10 +209,30 @@ struct mmc_card *mmc_alloc_card(struct mmc_host *host)
 int mmc_add_card(struct mmc_card *card)
 {
 	int ret;
+	const char *type;
 
 	snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
 		 "%s:%04x", mmc_hostname(card->host), card->rca);
 
+	switch (card->type) {
+	case MMC_TYPE_MMC:
+		type = "MMC";
+		break;
+	case MMC_TYPE_SD:
+		type = "SD";
+		if (mmc_card_blockaddr(card))
+			type = "SDHC";
+		break;
+	default:
+		type = "?";
+		break;
+	}
+
+	printk(KERN_INFO "%s: new %s%s card at address %04x\n",
+		mmc_hostname(card->host),
+		mmc_card_highspeed(card) ? "high speed " : "",
+		type, card->rca);
+
 	card->dev.uevent_suppress = 1;
 
 	ret = device_add(&card->dev);
@@ -243,6 +263,9 @@ int mmc_add_card(struct mmc_card *card)
 void mmc_remove_card(struct mmc_card *card)
 {
 	if (mmc_card_present(card)) {
+		printk(KERN_INFO "%s: card %04x removed\n",
+			mmc_hostname(card->host), card->rca);
+
 		if (card->host->bus_ops->sysfs_remove)
 			card->host->bus_ops->sysfs_remove(card->host, card);
 		device_del(&card->dev);

drivers/mmc/core/mmc.c

@@ -556,8 +556,10 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr)
 	/*
 	 * Can we support the voltage of the card?
 	 */
-	if (!host->ocr)
+	if (!host->ocr) {
+		err = -EINVAL;
 		goto err;
+	}
 
 	/*
 	 * Detect and init the card.
@@ -582,6 +584,9 @@ err:
 	mmc_detach_bus(host);
 	mmc_release_host(host);
 
+	printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
+		mmc_hostname(host), err);
+
 	return 0;
 }
 

drivers/mmc/core/sd.c

@@ -637,8 +637,10 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr)
 	/*
 	 * Can we support the voltage(s) of the card(s)?
 	 */
-	if (!host->ocr)
+	if (!host->ocr) {
+		err = -EINVAL;
 		goto err;
+	}
 
 	/*
 	 * Detect and init the card.
@@ -663,6 +665,9 @@ err:
 	mmc_detach_bus(host);
 	mmc_release_host(host);
 
+	printk(KERN_ERR "%s: error %d whilst initialising SD card\n",
+		mmc_hostname(host), err);
+
 	return 0;
 }