Merge tag 'mtd/fixes-for-4.20-rc2' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Boris Brezillon:
 "MTD changes:
   - Kill a VLA in sa1100

  SPI NOR changes:
   - Make sure ->addr_width is restored when SFDP parsing fails
   - Propate errors happening in cqspi_direct_read_execute()

  NAND changes:
   - Fix kernel-doc mismatch
   - Fix nanddev_neraseblocks() to return the correct value
   - Avoid selection of BCH_CONST_PARAMS when some users require dynamic
     BCH settings"

* tag 'mtd/fixes-for-4.20-rc2' of git://git.infradead.org/linux-mtd:
  mtd: nand: Fix nanddev_pos_next_page() kernel-doc header
  mtd: sa1100: avoid VLA in sa1100_setup_mtd
  mtd: spi-nor: Reset nor->addr_width when SFDP parsing failed
  mtd: spi-nor: cadence-quadspi: Return error code in cqspi_direct_read_execute()
  mtd: nand: Fix nanddev_neraseblocks()
  mtd: nand: drop kernel-doc notation for a deleted function parameter
  mtd: docg3: don't set conflicting BCH_CONST_PARAMS option

drivers/mtd/devices/Kconfig

@@ -207,7 +207,7 @@ comment "Disk-On-Chip Device Drivers"
 config MTD_DOCG3
 	tristate "M-Systems Disk-On-Chip G3"
 	select BCH
-	select BCH_CONST_PARAMS
+	select BCH_CONST_PARAMS if !MTD_NAND_BCH
 	select BITREVERSE
 	help
 	  This provides an MTD device driver for the M-Systems DiskOnChip

drivers/mtd/maps/sa1100-flash.c

@@ -221,7 +221,14 @@ static struct sa_info *sa1100_setup_mtd(struct platform_device *pdev,
 		info->mtd = info->subdev[0].mtd;
 		ret = 0;
 	} else if (info->num_subdev > 1) {
-		struct mtd_info *cdev[nr];
+		struct mtd_info **cdev;
+
+		cdev = kmalloc_array(nr, sizeof(*cdev), GFP_KERNEL);
+		if (!cdev) {
+			ret = -ENOMEM;
+			goto err;
+		}
+
 		/*
 		 * We detected multiple devices.  Concatenate them together.
 		 */
@@ -230,6 +237,7 @@ static struct sa_info *sa1100_setup_mtd(struct platform_device *pdev,
 
 		info->mtd = mtd_concat_create(cdev, info->num_subdev,
 					      plat->name);
+		kfree(cdev);
 		if (info->mtd == NULL) {
 			ret = -ENXIO;
 			goto err;

drivers/mtd/nand/raw/nand_base.c

@@ -590,7 +590,6 @@ nand_get_device(struct mtd_info *mtd, int new_state)
 
 /**
  * panic_nand_wait - [GENERIC] wait until the command is done
- * @mtd: MTD device structure
  * @chip: NAND chip structure
  * @timeo: timeout
  *

drivers/mtd/spi-nor/cadence-quadspi.c

@@ -996,7 +996,7 @@ static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf,
 err_unmap:
 	dma_unmap_single(nor->dev, dma_dst, len, DMA_FROM_DEVICE);
 
-	return 0;
+	return ret;
 }
 
 static ssize_t cqspi_read(struct spi_nor *nor, loff_t from,

drivers/mtd/spi-nor/spi-nor.c

@@ -3250,13 +3250,15 @@ static int spi_nor_init_params(struct spi_nor *nor,
 		memcpy(&sfdp_params, params, sizeof(sfdp_params));
 		memcpy(&prev_map, &nor->erase_map, sizeof(prev_map));
 
-		if (spi_nor_parse_sfdp(nor, &sfdp_params))
+		if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
+			nor->addr_width = 0;
 			/* restore previous erase map */
 			memcpy(&nor->erase_map, &prev_map,
 			       sizeof(nor->erase_map));
-		else
+		} else {
 			memcpy(params, &sfdp_params, sizeof(*params));
 		}
+	}
 
 	return 0;
 }

include/linux/mtd/nand.h

@@ -324,9 +324,8 @@ static inline unsigned int nanddev_ntargets(const struct nand_device *nand)
  */
 static inline unsigned int nanddev_neraseblocks(const struct nand_device *nand)
 {
-	return (u64)nand->memorg.luns_per_target *
-	       nand->memorg.eraseblocks_per_lun *
-	       nand->memorg.pages_per_eraseblock;
+	return nand->memorg.ntargets * nand->memorg.luns_per_target *
+	       nand->memorg.eraseblocks_per_lun;
 }
 
 /**
@@ -569,7 +568,7 @@ static inline void nanddev_pos_next_eraseblock(struct nand_device *nand,
 }
 
 /**
- * nanddev_pos_next_eraseblock() - Move a position to the next page
+ * nanddev_pos_next_page() - Move a position to the next page
  * @nand: NAND device
  * @pos: the position to update
  *