[U-Boot] git send-email and patch headers/subject line

[Stephen Arnold]

Howdy:

I could swear this worked the last time I sent patches to the OE list
(at least it didn't need the gmail insecure app workaround so I guess
it was a while ago).

Anyway, the real commit msg starts with ARM, I git format-patch and
this time didn't touch the patches, then:

git send-email --to=test at lists.denx.de --confirm=always -M -1
--subject-prefix="U-Boot][PATCH v3"  outgoing/*

with two patches.  In my gmail I see the first patch email still gets
threaded with the original email (with only one patch) and gets the
U-Boot][PATCH v3 but not a 1/2.

The second one gets PATCH 2/2 but not the U-Boot or v3.  Is there a
trick to this I'm missing, or does it only work correctly without the
format-patch step?  Sorry, but git send-email has never been part of
the Gentoo process so I kinda rely on the wiki pages for "how to
submit patches" for things like this.  And this page:

http://www.denx.de/wiki/U-Boot/Patches

doesn't mention using the  U-Boot][PATCH  string in subject arg.  And
I think I just answered one of my questions; is "git format-patch -n
--cover-letter" required to get more than one patch to thread
correctly?

Thanks in advance for any help clearing this up.

Steve