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mtd: cfi_cmdset_0002: Avoid walking all chips when unlocking.

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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")
Cc: stable@vger.kernel.org
Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joakim Tjernlund 2018-06-06 12:13:30 +02:00 committed by Greg Kroah-Hartman
parent fbbde9343c
commit c375d0bd66
1 changed files with 2 additions and 0 deletions
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2
drivers/mtd/chips/cfi_cmdset_0002.c
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@ -2685,6 +2685,8 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
i++;
if (adr >> cfi->chipshift) {
if (offset >= (ofs + len))
break;
adr = 0;
chipnum++;