X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fgeneric%2Fbackport-4.9%2F063-v4.11-0002-mtd-introduce-function-max_bad_blocks.patch;fp=target%2Flinux%2Fgeneric%2Fbackport-4.9%2F063-v4.11-0002-mtd-introduce-function-max_bad_blocks.patch;h=d2e582ef5b5adf413c29dc650ed545281a311f57;hb=eefe02b23f5347a90eb19cdbaaa24387fe160fe4;hp=0000000000000000000000000000000000000000;hpb=1188f35a986a78475819bc5550a8a7bc2d21b16c;p=openwrt%2Fstaging%2Fdedeckeh.git

diff --git a/target/linux/generic/backport-4.9/063-v4.11-0002-mtd-introduce-function-max_bad_blocks.patch b/target/linux/generic/backport-4.9/063-v4.11-0002-mtd-introduce-function-max_bad_blocks.patch
new file mode 100644
index 0000000000..d2e582ef5b
--- /dev/null
+++ b/target/linux/generic/backport-4.9/063-v4.11-0002-mtd-introduce-function-max_bad_blocks.patch
@@ -0,0 +1,73 @@
+From 6080ef6e7c0a0592cbcca11200d879faf65e27d4 Mon Sep 17 00:00:00 2001
+From: Jeff Westfahl <jeff.westfahl@ni.com>
+Date: Tue, 10 Jan 2017 13:30:17 -0600
+Subject: [PATCH] mtd: introduce function max_bad_blocks
+
+If implemented, 'max_bad_blocks' returns the maximum number of bad
+blocks to reserve for a MTD. An implementation for NAND is coming soon.
+
+Signed-off-by: Jeff Westfahl <jeff.westfahl@ni.com>
+Signed-off-by: Zach Brown <zach.brown@ni.com>
+Acked-by: Boris Brezillon <boris.brezillon@free-electron.com>
+Acked-by: Brian Norris <computersforpeace@gmail.com>
+Signed-off-by: Brian Norris <computersforpeace@gmail.com>
+---
+ drivers/mtd/mtdpart.c   | 10 ++++++++++
+ include/linux/mtd/mtd.h | 13 +++++++++++++
+ 2 files changed, 23 insertions(+)
+
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -349,6 +349,14 @@ static const struct mtd_ooblayout_ops pa
+ 	.free = part_ooblayout_free,
+ };
+ 
++static int part_max_bad_blocks(struct mtd_info *mtd, loff_t ofs, size_t len)
++{
++	struct mtd_part *part = mtd_to_part(mtd);
++
++	return part->master->_max_bad_blocks(part->master,
++					     ofs + part->offset, len);
++}
++
+ static inline void free_partition(struct mtd_part *p)
+ {
+ 	kfree(p->mtd.name);
+@@ -475,6 +483,8 @@ static struct mtd_part *allocate_partiti
+ 		slave->mtd._block_isbad = part_block_isbad;
+ 	if (master->_block_markbad)
+ 		slave->mtd._block_markbad = part_block_markbad;
++	if (master->_max_bad_blocks)
++		slave->mtd._max_bad_blocks = part_max_bad_blocks;
+ 
+ 	if (master->_get_device)
+ 		slave->mtd._get_device = part_get_device;
+--- a/include/linux/mtd/mtd.h
++++ b/include/linux/mtd/mtd.h
+@@ -322,6 +322,7 @@ struct mtd_info {
+ 	int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs);
+ 	int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
+ 	int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
++	int (*_max_bad_blocks) (struct mtd_info *mtd, loff_t ofs, size_t len);
+ 	int (*_suspend) (struct mtd_info *mtd);
+ 	void (*_resume) (struct mtd_info *mtd);
+ 	void (*_reboot) (struct mtd_info *mtd);
+@@ -397,6 +398,18 @@ static inline int mtd_oobavail(struct mt
+ 	return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize;
+ }
+ 
++static inline int mtd_max_bad_blocks(struct mtd_info *mtd,
++				     loff_t ofs, size_t len)
++{
++	if (!mtd->_max_bad_blocks)
++		return -ENOTSUPP;
++
++	if (mtd->size < (len + ofs) || ofs < 0)
++		return -EINVAL;
++
++	return mtd->_max_bad_blocks(mtd, ofs, len);
++}
++
+ int mtd_wunit_to_pairing_info(struct mtd_info *mtd, int wunit,
+ 			      struct mtd_pairing_info *info);
+ int mtd_pairing_info_to_wunit(struct mtd_info *mtd,