On Fri, 2018-03-02 at 09:50 +0100, Greg Kroah-Hartman wrote: > 4.4-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > > > [ Upstream commit fdf2e821052958a114618a95ab18a300d0b080cb ] > > When erased subpages are read then the BCH decoder returns STATUS_ERASED > if they are all empty, or STATUS_UNCORRECTABLE if there are bitflips. > When there are bitflips, we have to set these bits again to show the > upper layers a completely erased page. When a bitflip happens in the > exact byte where the bad block marker is, then this byte is swapped > with another byte in block_mark_swapping(). The correction code then > detects a bitflip in another subpage and no longer corrects the bitflip > where it really happens. [...] This seesm to be a bug fix for commit bd2e778c9ee3 "gpmi-nand: Handle ECC Errors in erased pages". That's not in 4.4 so the bug fix is not needed, though it doesn't appear to do any harm. Ben. -- Ben Hutchings Software Developer, Codethink Ltd.