[flashrom] Avoton patches for flashrom

[TR Reardon]

Ok, sorry for my misunderstanding.  But even with that change,
copy_old_content() still gets called to copy the old non-readable
regions.  Shouldn't copy_old_content() just set oldcontent and
newcontent to all-ones for excluded regions?

The unselected regions are not automatically skipped by the "do I need
to erase and then update this block?" comparison logic in
need_erase(), correct?  At least, when I run it, the excluded regions
are erased (rather than skipped), but then not written.

Anyway, I made one minor adjustment to your layout patches for partial
read, else segfault:

---
diff --git a/flashrom.c b/flashrom.c
index 27d1736..e3639ae 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -1286,10 +1286,10 @@ int write_image_to_file(const unsigned char
*buf, unsigned long size, const char
        l = get_next_included_romentry(0);

        while (l != NULL) {
-               const char* name = (l->file[0] == '\0') ? l->name : l->file;
+               const char* name = (l->file == NULL || l->file[0] ==
'\0') ? l->name : l->file;
                unsigned int len = l->end - l->start + 1;
                msg_gdbg2("Writing \"%s\" to \"%s\" 0x%08x - 0x%08x (%uB)... ",
-                         l->name, l->file, l->start, l->end, len);
+                         l->name, name, l->start, l->end, len);
                if (write_buf_to_file(buf + l->start, len, name) != 0) {
                        msg_gdbg2("failed.\n");
                        return 1;
+Reardon


On Tue, Aug 12, 2014 at 4:33 PM, Stefan Tauner
<stefan.tauner at alumni.tuwien.ac.at> wrote:
> On Mon, 11 Aug 2014 19:14:53 -0400
> TR Reardon <thomas_reardon at hotmail.com> wrote:
>
>> I'd like to start experimenting with partial-write support, now that
>> partial-read works well for me.  But as of  now doit() does a full read
>> before the write, which of course fails.  Any updates that I could test?
>>  Any useful log I can provide regarding successes?
>>
>> Note, I now have a buspirate so I can do full writes to recover, as needed
>> (this works successfully now, if slowly)
>
> As I wrote in my previous mail, (after applying the layout patches) you
> can disable the full read in doit() by setting read_all_first to 0.
> There are no further changes yet, because it does not make much sense
> until the proposed ones are merged...
>
> --
> Kind regards/Mit freundlichen Grüßen, Stefan Tauner
>