mmc: core: Remove SD card upon recovery failure

In case of bad SD card recovery fails everytime.
Also some SD cards fail on Read/writes but can get initialized
successfully.

Mark card as removed and gracefully remove by calling
mmc_detect_change. Also mark the card as corrupted and return
to avoid reinitialization as sdhci_get_cd will return non zero as the
card is physically present and avoid mmc_rescan from proceeding ahead.

Change-Id: Id4c99d4608ef2b5f49cf5ac796a2aaf6d12a56c2
Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org>

drivers/mmc/core/block.c

@@ -1840,6 +1840,15 @@ static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req)
 	    err && mmc_blk_reset(md, card->host, type)) {
 		pr_err("%s: recovery failed!\n", req->rq_disk->disk_name);
 		mqrq->retries = MMC_NO_RETRIES;
+
+#if defined(CONFIG_SDC_QTI)
+		/* Completely remove the non-recoverable card */
+		if (mmc_card_sd(card)) {
+			mmc_card_set_removed(card);
+			card->host->corrupted_card = true;
+			mmc_detect_change(card->host, msecs_to_jiffies(200));
+		}
+#endif
 		return;
 	}
 

drivers/mmc/core/core.c

@@ -2997,6 +2997,11 @@ void mmc_rescan(struct work_struct *work)
 	if (host->bus_ops && !host->bus_dead)
 		host->bus_ops->detect(host);
 
+#if defined(CONFIG_SDC_QTI)
+	if (host->corrupted_card)
+		return;
+#endif
+
 	host->detect_change = 0;
 
 	/*

drivers/mmc/core/slot-gpio.c

@@ -32,6 +32,11 @@ static irqreturn_t mmc_gpio_cd_irqt(int irq, void *dev_id)
 	struct mmc_host *host = dev_id;
 	struct mmc_gpio *ctx = host->slot.handler_priv;
 
+#if defined(CONFIG_SDC_QTI)
+	/* New card is not corrupted */
+	host->corrupted_card = false;
+#endif
+
 	host->trigger_card_event = true;
 	mmc_detect_change(host, msecs_to_jiffies(ctx->cd_debounce_delay_ms));
 

include/linux/mmc/host.h

@@ -499,7 +499,9 @@ struct mmc_host {
 
 	int			rescan_disable;	/* disable card detection */
 	int			rescan_entered;	/* used with nonremovable devices */
-
+#if defined(CONFIG_SDC_QTI)
+	bool			corrupted_card; /* good/bad associated card */
+#endif
 	int			need_retune;	/* re-tuning is needed */
 	int			hold_retune;	/* hold off re-tuning */
 	unsigned int		retune_period;	/* re-tuning period in secs */