From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:49704 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730065AbeKLFsK (ORCPT ); Mon, 12 Nov 2018 00:48:10 -0500 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Joakim Tjernlund" , "Boris Brezillon" Date: Sun, 11 Nov 2018 19:49:05 +0000 Message-ID: Subject: [PATCH 3.16 180/366] mtd: cfi_cmdset_0002: Avoid walking all chips when unlocking. In-Reply-To: Sender: stable-owner@vger.kernel.org List-ID: 3.16.61-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Joakim Tjernlund 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") Signed-off-by: Joakim Tjernlund Signed-off-by: Boris Brezillon Signed-off-by: Ben Hutchings --- 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 @@ -2356,6 +2356,8 @@ static int __maybe_unused cfi_ppb_unlock i++; if (adr >> cfi->chipshift) { + if (offset >= (ofs + len)) + break; adr = 0; chipnum++;