staging: brcm80211: improved checks on incompatible firmware
The return status of wl_ucode_init_buf() is now being used. Also a bug in firmware validation, which could lead to incompatible firmware not being rejected by the driver, has been fixed. Comment from Dan Carpenter on using negative error values has been incorporated in this commit. Signed-off-by: NRoland Vossen <rvossen@broadcom.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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