brcm/brcmfmac4356-pcie.bin failed with error -2

[Diederik de Haas <didi.debian@cknow.org>]

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Hi,

In https://bugs.debian.org/1032367 we have a user who reported that the
brcm/brcmfmac4356-pcie.bin firmware file failed to load with a new firmware-
brcm80211 package, while it succeeded with an old one.

In https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/ 
I found 2 commits that seem relevant:
- 04f71fe564552c22dc7ece0d2b8afc11b33de392 where various cypress firmware and 
clm_blob files (including 4356) were added to the *cypress* directory.
- 0f0aefd733f70beae4c0246edbd2c158d5ce974c which removed old brcm firmware files 
that have a newer cypress variant ...  from the *brcm* directory.

So in essence a bunch of firmware files were moved from 'brcm' dir to 'cypress'.

I don't know how the firmware file loading mechanism works, but could it be that 
it (also) needs to look in the new (cypress) location for those files?

Or is the issue somewhere else (f.e. in Debian)?

Cheers,
  Diederik

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