From: Joakim Tjernlund Date: Wed, 6 Jun 2018 10:13:29 +0000 (+0200) Subject: mtd: cfi_cmdset_0002: Fix unlocking requests crossing a chip boudary X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fbbde9343c3e2452f304cc7715d77d4c9481ac3a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git mtd: cfi_cmdset_0002: Fix unlocking requests crossing a chip boudary commit 0cd8116f172eed018907303dbff5c112690eeb91 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: 1648eaaa1575 ("mtd: cfi_cmdset_0002: Support Persistent Protection Bits (PPB) locking") Cc: stable@vger.kernel.org Signed-off-by: Joakim Tjernlund Signed-off-by: Boris Brezillon Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index b6cbe683c9c2..c3e90e67f3f4 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -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(