1 files changed, 89 insertions, 40 deletions

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 17f63f95f4a2..a49cd81ae416 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -138,20 +138,12 @@ int spinand_select_target(struct spinand_device *spinand, unsigned int target)
 	return 0;
 }
 
-static int spinand_init_cfg_cache(struct spinand_device *spinand)
+static int spinand_read_cfg(struct spinand_device *spinand)
 {
 	struct nand_device *nand = spinand_to_nand(spinand);
-	struct device *dev = &spinand->spimem->spi->dev;
 	unsigned int target;
 	int ret;
 
-	spinand->cfg_cache = devm_kcalloc(dev,
-					  nand->memorg.ntargets,
-					  sizeof(*spinand->cfg_cache),
-					  GFP_KERNEL);
-	if (!spinand->cfg_cache)
-		return -ENOMEM;
-
 	for (target = 0; target < nand->memorg.ntargets; target++) {
 		ret = spinand_select_target(spinand, target);
 		if (ret)
@@ -170,6 +162,21 @@ static int spinand_init_cfg_cache(struct spinand_device *spinand)
 	return 0;
 }
 
+static int spinand_init_cfg_cache(struct spinand_device *spinand)
+{
+	struct nand_device *nand = spinand_to_nand(spinand);
+	struct device *dev = &spinand->spimem->spi->dev;
+
+	spinand->cfg_cache = devm_kcalloc(dev,
+					  nand->memorg.ntargets,
+					  sizeof(*spinand->cfg_cache),
+					  GFP_KERNEL);
+	if (!spinand->cfg_cache)
+		return -ENOMEM;
+
+	return 0;
+}
+
 static int spinand_init_quad_enable(struct spinand_device *spinand)
 {
 	bool enable = false;
@@ -290,6 +297,8 @@ static int spinand_ondie_ecc_finish_io_req(struct nand_device *nand,
 {
 	struct spinand_ondie_ecc_conf *engine_conf = nand->ecc.ctx.priv;
 	struct spinand_device *spinand = nand_to_spinand(nand);
+	struct mtd_info *mtd = spinand_to_mtd(spinand);
+	int ret;
 
 	if (req->mode == MTD_OPS_RAW)
 		return 0;
@@ -299,7 +308,13 @@ static int spinand_ondie_ecc_finish_io_req(struct nand_device *nand,
 		return 0;
 
 	/* Finish a page write: check the status, report errors/bitflips */
-	return spinand_check_ecc_status(spinand, engine_conf->status);
+	ret = spinand_check_ecc_status(spinand, engine_conf->status);
+	if (ret == -EBADMSG)
+		mtd->ecc_stats.failed++;
+	else if (ret > 0)
+		mtd->ecc_stats.corrected += ret;
+
+	return ret;
 }
 
 static struct nand_ecc_engine_ops spinand_ondie_ecc_engine_ops = {
@@ -620,13 +635,10 @@ static int spinand_mtd_read(struct mtd_info *mtd, loff_t from,
 		if (ret < 0 && ret != -EBADMSG)
 			break;
 
-		if (ret == -EBADMSG) {
+		if (ret == -EBADMSG)
 			ecc_failed = true;
-			mtd->ecc_stats.failed++;
-		} else {
-			mtd->ecc_stats.corrected += ret;
+		else
 			max_bitflips = max_t(unsigned int, max_bitflips, ret);
-		}
 
 		ret = 0;
 		ops->retlen += iter.req.datalen;
@@ -1074,12 +1086,71 @@ static int spinand_detect(struct spinand_device *spinand)
 	return 0;
 }
 
+static int spinand_init_flash(struct spinand_device *spinand)
+{
+	struct device *dev = &spinand->spimem->spi->dev;
+	struct nand_device *nand = spinand_to_nand(spinand);
+	int ret, i;
+
+	ret = spinand_read_cfg(spinand);
+	if (ret)
+		return ret;
+
+	ret = spinand_init_quad_enable(spinand);
+	if (ret)
+		return ret;
+
+	ret = spinand_upd_cfg(spinand, CFG_OTP_ENABLE, 0);
+	if (ret)
+		return ret;
+
+	ret = spinand_manufacturer_init(spinand);
+	if (ret) {
+		dev_err(dev,
+		"Failed to initialize the SPI NAND chip (err = %d)\n",
+		ret);
+		return ret;
+	}
+
+	/* After power up, all blocks are locked, so unlock them here. */
+	for (i = 0; i < nand->memorg.ntargets; i++) {
+		ret = spinand_select_target(spinand, i);
+		if (ret)
+			break;
+
+		ret = spinand_lock_block(spinand, BL_ALL_UNLOCKED);
+		if (ret)
+			break;
+	}
+
+	if (ret)
+		spinand_manufacturer_cleanup(spinand);
+
+	return ret;
+}
+
+static void spinand_mtd_resume(struct mtd_info *mtd)
+{
+	struct spinand_device *spinand = mtd_to_spinand(mtd);
+	int ret;
+
+	ret = spinand_reset_op(spinand);
+	if (ret)
+		return;
+
+	ret = spinand_init_flash(spinand);
+	if (ret)
+		return;
+
+	spinand_ecc_enable(spinand, false);
+}
+
 static int spinand_init(struct spinand_device *spinand)
 {
 	struct device *dev = &spinand->spimem->spi->dev;
 	struct mtd_info *mtd = spinand_to_mtd(spinand);
 	struct nand_device *nand = mtd_to_nanddev(mtd);
-	int ret, i;
+	int ret;
 
 	/*
 	 * We need a scratch buffer because the spi_mem interface requires that
@@ -1112,22 +1183,10 @@ static int spinand_init(struct spinand_device *spinand)
 	if (ret)
 		goto err_free_bufs;
 
-	ret = spinand_init_quad_enable(spinand);
+	ret = spinand_init_flash(spinand);
 	if (ret)
 		goto err_free_bufs;
 
-	ret = spinand_upd_cfg(spinand, CFG_OTP_ENABLE, 0);
-	if (ret)
-		goto err_free_bufs;
-
-	ret = spinand_manufacturer_init(spinand);
-	if (ret) {
-		dev_err(dev,
-			"Failed to initialize the SPI NAND chip (err = %d)\n",
-			ret);
-		goto err_free_bufs;
-	}
-
 	ret = spinand_create_dirmaps(spinand);
 	if (ret) {
 		dev_err(dev,
@@ -1136,17 +1195,6 @@ static int spinand_init(struct spinand_device *spinand)
 		goto err_manuf_cleanup;
 	}
 
-	/* After power up, all blocks are locked, so unlock them here. */
-	for (i = 0; i < nand->memorg.ntargets; i++) {
-		ret = spinand_select_target(spinand, i);
-		if (ret)
-			goto err_manuf_cleanup;
-
-		ret = spinand_lock_block(spinand, BL_ALL_UNLOCKED);
-		if (ret)
-			goto err_manuf_cleanup;
-	}
-
 	ret = nanddev_init(nand, &spinand_ops, THIS_MODULE);
 	if (ret)
 		goto err_manuf_cleanup;
@@ -1167,6 +1215,7 @@ static int spinand_init(struct spinand_device *spinand)
 	mtd->_block_isreserved = spinand_mtd_block_isreserved;
 	mtd->_erase = spinand_mtd_erase;
 	mtd->_max_bad_blocks = nanddev_mtd_max_bad_blocks;
+	mtd->_resume = spinand_mtd_resume;
 
 	if (nand->ecc.engine) {
 		ret = mtd_ooblayout_count_freebytes(mtd);