mtd: nand: free vendor-specific resources in init failure paths

If we fail any time after calling nand_detect(), then we don't call the
vendor-specific ->cleanup() callback, and we'll leak any resources the
vendor-specific code might have allocated.

Mark the "fix" against the first commit that started allocating anything
in ->init().

Fixes: 626994e07480 ("mtd: nand: hynix: Add read-retry support for 1x nm MLC NANDs")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 6678229..81f77f9 100644 (file)
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -4361,7 +4361,7 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
        /* Initialize the ->data_interface field. */
        ret = nand_init_data_interface(chip);
        if (ret)
-               return ret;
+               goto err_nand_init;
 
        /*
         * Setup the data interface correctly on the chip and controller side.
@@ -4373,7 +4373,7 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
         */
        ret = nand_setup_data_interface(chip);
        if (ret)
-               return ret;
+               goto err_nand_init;
 
        nand_maf_id = chip->id.data[0];
        nand_dev_id = chip->id.data[1];
@@ -4404,6 +4404,12 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
        mtd->size = i * chip->chipsize;
 
        return 0;
+
+err_nand_init:
+       /* Free manufacturer priv data. */
+       nand_manufacturer_cleanup(chip);
+
+       return ret;
 }
 EXPORT_SYMBOL(nand_scan_ident);
 
@@ -4574,18 +4580,23 @@ int nand_scan_tail(struct mtd_info *mtd)
 
        /* New bad blocks should be marked in OOB, flash-based BBT, or both */
        if (WARN_ON((chip->bbt_options & NAND_BBT_NO_OOB_BBM) &&
-                  !(chip->bbt_options & NAND_BBT_USE_FLASH)))
-               return -EINVAL;
+                  !(chip->bbt_options & NAND_BBT_USE_FLASH))) {
+               ret = -EINVAL;
+               goto err_ident;
+       }
 
        if (invalid_ecc_page_accessors(chip)) {
                pr_err("Invalid ECC page accessors setup\n");
-               return -EINVAL;
+               ret = -EINVAL;
+               goto err_ident;
        }
 
        if (!(chip->options & NAND_OWN_BUFFERS)) {
                nbuf = kzalloc(sizeof(*nbuf), GFP_KERNEL);
-               if (!nbuf)
-                       return -ENOMEM;
+               if (!nbuf) {
+                       ret = -ENOMEM;
+                       goto err_ident;
+               }
 
                nbuf->ecccalc = kmalloc(mtd->oobsize, GFP_KERNEL);
                if (!nbuf->ecccalc) {
@@ -4608,8 +4619,10 @@ int nand_scan_tail(struct mtd_info *mtd)
 
                chip->buffers = nbuf;
        } else {
-               if (!chip->buffers)
-                       return -ENOMEM;
+               if (!chip->buffers) {
+                       ret = -ENOMEM;
+                       goto err_ident;
+               }
        }
 
        /* Set the internal oob buffer location, just after the page data */
@@ -4854,6 +4867,13 @@ err_free:
                kfree(nbuf->ecccalc);
                kfree(nbuf);
        }
+
+err_ident:
+       /* Clean up nand_scan_ident(). */
+
+       /* Free manufacturer priv data. */
+       nand_manufacturer_cleanup(chip);
+
        return ret;
 }
 EXPORT_SYMBOL(nand_scan_tail);