mmc: core: Add a debug print when the card may have been replaced

If the card was removed in suspended state and a new one was inserted,
print a debug log when the check detects that it's not the old card.
Signed-off-by: hongjiefang <hongjiefang@asrmicro.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/mmc.c

@@ -1594,6 +1594,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 
 	if (oldcard) {
 		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
 			err = -ENOENT;
 			goto err;
 		}

drivers/mmc/core/sd.c

@@ -951,8 +951,11 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 		return err;
 
 	if (oldcard) {
-		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
+		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
 			return -ENOENT;
+		}
 
 		card = oldcard;
 	} else {

drivers/mmc/core/sdio.c

@@ -617,6 +617,8 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 		if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
 		    memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
 			mmc_remove_card(card);
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
 			return -ENOENT;
 		}
 	} else {
@@ -624,6 +626,8 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 
 		if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
 			mmc_remove_card(card);
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
 			return -ENOENT;
 		}
 	}
@@ -736,8 +740,11 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 		int same = (card->cis.vendor == oldcard->cis.vendor &&
 			    card->cis.device == oldcard->cis.device);
 		mmc_remove_card(card);
-		if (!same)
+		if (!same) {
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
 			return -ENOENT;
+		}
 
 		card = oldcard;
 	}