On Wed, 20 Jun 2018 11:10:23 +0000 Joakim Tjernlund Joakim.Tjernlund@infinera.com wrote:
On Wed, 2018-06-20 at 11:14 +0200, Boris Brezillon wrote:
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On Wed, 6 Jun 2018 12:13:29 +0200 Joakim Tjernlund joakim.tjernlund@infinera.com wrote:
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.
^ avoid
As I said before, I think the current code is doing worse than just relocking already locked sectors. As soon as you cross a chip boundary, addr is set back to 0, and the (addr < offs || adr >= (ofs + len)) might be true while it shouldn't be (absolute offset still in the unlock range), which means you'll lock sectors that the caller expect to be unlocked.
I don't see how, the code asks for its current lock status and will reapply those that are locked again.
After reading the commit message a second time I think I misunderstood it. I thought you were implying that the re-locking operation was harmless and the only reason for fixing the test was to avoid useless lock operations, but that's not what you wrote.
Sorry for the noise.