CHROMIUM: iwl7000: Fail fast if HW is inaccessible at probe
If the HW is not responding at probe time, fail immediately complaining
about it. Without this, we see that the kernel spends > 100ms trying to
load firmware (even gives an incorrect impression that it actually
loaded a firmware) and do unnecesary processing before concluding that
the device is not accessible:
INFO kernel: [ 34.092678] iwlwifi 0000:01:00.0: enabling device (0000 -> 0002)
WARNING kernel: [ 34.093560] iwlwifi 0000:01:00.0: Direct firmware load for iwl-dbg-cfg.ini failed with error -2
INFO kernel: [ 34.111523] iwlwifi 0000:01:00.0: loaded firmware version 17.318154.0 op_mode iwlmvm
INFO kernel: [ 34.173250] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band wireless-3.8 AC 7265, REV=0xFFFFFFFF
ERR kernel: [ 34.198023] iwlwifi 0000:01:00.0: iwlwifi transaction failed, dumping registers
ERR kernel: [ 34.198044] iwlwifi 0000:01:00.0: iwlwifi device config registers:
Signed-off-by: Rajat Jain <rajatja@google.com>
BUG=b:78586198
TEST=check it fails sooner if HW not accessible.
Change-Id: I4fb5fea510961f18ee1bc1404ee7f85a7c40b22e
Reviewed-on: https://chromium-review.googlesource.com/1038426
Commit-Ready: Kirtika Ruchandani <kirtika@chromium.org>
Tested-by: Rajat Jain <rajatja@chromium.org>
Reviewed-by: Rajat Jain <rajatja@chromium.org>
1 file changed
