[v2,3/4] mtd: cfi_cmdset_0002: Avoid point less unlocking/locking

Message ID 20180606101330.11071-3-joakim.tjernlund@infinera.com
State New
Delegated to: Boris Brezillon
Headers show
Series
  • [v2,1/4] mtd: cfi_cmdset_0002: Use right chip in do_ppb_xxlock()
Related show

Commit Message

Joakim Tjernlund June 6, 2018, 10:13 a.m.
cfi_ppb_unlock() walks all flash chips when unlocking sectors.
testing lock status on each chip which causes relocking of already
locked sectors. Test against offset to aviod this aliasing.

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>
---

 v2 - Spilt into several patches


 drivers/mtd/chips/cfi_cmdset_0002.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index cb85cccc48c1..b6273ce83de7 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -2670,7 +2670,7 @@  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(