4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Joakim Tjernlund <[email protected]> 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: [email protected] Signed-off-by: Joakim Tjernlund <[email protected]> Signed-off-by: Boris Brezillon <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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 @@ -2683,6 +2683,8 @@ static int __maybe_unused cfi_ppb_unlock i++; if (adr >> cfi->chipshift) { + if (offset >= (ofs + len)) + break; adr = 0; chipnum++;
