| From: Joakim Tjernlund <joakim.tjernlund@infinera.com> |
| Date: Wed, 6 Jun 2018 12:13:30 +0200 |
| Subject: mtd: cfi_cmdset_0002: Avoid walking all chips when unlocking. |
| |
| commit f1ce87f6080b1dda7e7b1eda3da332add19d87b9 upstream. |
| |
| cfi_ppb_unlock() walks all flash chips when unlocking sectors, |
| avoid walking chips unaffected by the unlock operation. |
| |
| Fixes: 1648eaaa1575 ("mtd: cfi_cmdset_0002: Support Persistent Protection Bits (PPB) locking") |
| Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com> |
| Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> |
| Signed-off-by: Ben Hutchings <ben@decadent.org.uk> |
| --- |
| drivers/mtd/chips/cfi_cmdset_0002.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/drivers/mtd/chips/cfi_cmdset_0002.c |
| +++ b/drivers/mtd/chips/cfi_cmdset_0002.c |
| @@ -2356,6 +2356,8 @@ static int __maybe_unused cfi_ppb_unlock |
| i++; |
| |
| if (adr >> cfi->chipshift) { |
| + if (offset >= (ofs + len)) |
| + break; |
| adr = 0; |
| chipnum++; |
| |
