wifi: brcmfmac: support CQM RSSI notification with older firmware

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[ Upstream commit ec52d77d07 ]

Using the BCM4339 firmware from linux-firmware (version "BCM4339/2 wl0:
Sep  5 2019 11:05:52 version 6.37.39.113 (r722271 CY)" from
cypress/cyfmac4339-sdio.bin) the RSSI respose is only 4 bytes, which
results in an error being logged.

It seems that older devices send only the RSSI field and neither SNR nor
noise is included.  Handle this by accepting a 4 byte message and
reading only the RSSI from it.

Fixes: 7dd56ea45a ("brcmfmac: add support for CQM RSSI notifications")
Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230124104248.2917465-1-john@metanate.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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John Keeping 2023-01-24 10:42:48 +00:00 • committed by Greg Kroah-Hartman

parent 9354826c02

commit 0022a3936e

1 changed files with 8 additions and 6 deletions

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drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

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