4.9-stable review patch. If anyone has any objections, please let me know.
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From: Joakim Tjernlund joakim.tjernlund@infinera.com
commit 5fdfc3dbad099281bf027a353d5786c09408a8e5 upstream.
cfi_ppb_unlock() tries to relock all sectors that were locked before unlocking the whole chip. This locking used the chip start address + the FULL offset from the first flash chip, thereby forming an illegal address. Fix that by using the chip offset(adr).
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 Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mtd/chips/cfi_cmdset_0002.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -2531,7 +2531,7 @@ static int cfi_atmel_unlock(struct mtd_i
struct ppb_lock { struct flchip *chip; - loff_t offset; + unsigned long adr; int locked; };
@@ -2667,7 +2667,7 @@ static int __maybe_unused cfi_ppb_unlock */ if ((adr < ofs) || (adr >= (ofs + len))) { sect[sectors].chip = &cfi->chips[chipnum]; - sect[sectors].offset = offset; + sect[sectors].adr = adr; sect[sectors].locked = do_ppb_xxlock( map, &cfi->chips[chipnum], adr, 0, DO_XXLOCK_ONEBLOCK_GETLOCK); @@ -2711,7 +2711,7 @@ static int __maybe_unused cfi_ppb_unlock */ for (i = 0; i < sectors; i++) { if (sect[i].locked) - do_ppb_xxlock(map, sect[i].chip, sect[i].offset, 0, + do_ppb_xxlock(map, sect[i].chip, sect[i].adr, 0, DO_XXLOCK_ONEBLOCK_LOCK); }