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mtd: cfi_cmdset_0002: Fix unlocking requests crossing a chip boudary

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commit 0cd8116f17 upstream.

The "sector is in requested range" test used to determine whether
sectors should be re-locked or not is done on a variable that is reset
everytime we cross a chip boundary, which can lead to some blocks being
re-locked while the caller expect them to be unlocked.
Fix the check to make sure this cannot happen.

Fixes: 1648eaaa15 ("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 12:13:29 +02:00
committed by Greg Kroah-Hartman
parent 2f11a0c8c2
commit fbbde9343c
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/chips/cfi_cmdset_0002.c
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@@ -2669,7 +2669,7 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
* sectors shall be unlocked, so lets keep their locking
* status at "unlocked" (locked=0) for the final re-locking.
*/
if ((adr < ofs) || (adr >= (ofs + len))) {
if ((offset < ofs) || (offset >= (ofs + len))) {
sect[sectors].chip = &cfi->chips[chipnum];
sect[sectors].adr = adr;
sect[sectors].locked = do_ppb_xxlock(