We are using Cypress 4373 wireless chip on a hardware with usb interface, after compiling the drivers we get compat.ko, cfg80211.ko,brcmutil.ko and brcmfmac.ko modules. After inserting the modules in sequence (compat.ko, cfg80211.ko,brcmutil.ko and brcmfmac.ko) we get error "brcmf_usb_dl_cmd: usb_submit_urb failed -19" after brcmfmac.ko is inserted.
Please let us know how do we resolve the issue.
Could you post the .config file that you used while building the kernel. Did you enable the following flag in the .config file.
Also please post the dmesg log of the error that you are getting.
Please insmod the brcmfmac.ko with the log level 0x00002000
>> insmod brcmfmac.ko debug=0x00002000;