Re: [PATCH V3 2/2] brcmfmac: don't warn user about NVRAM if fallback to platform one succeeds

[Arend Van Spriel]

On 21-2-2017 10:47, RafaÅ MiÅecki wrote:
> From: RafaÅ MiÅecki <rafal@xxxxxxxxxx>
> 
> Failing to load NVRAM file isn't critical if we manage to get platform
> one in the fallback path. It means warnings like:
> [   10.801506] brcmfmac 0000:01:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.txt failed with error -2
> are unnecessary & disturbing for people with platform NVRAM. This is
> very common case for Broadcom home routers.
> 
> So instead of printing warning immediately with the firmware subsystem
> let's first try our fallback code. If that fails as well, then it's a
> right moment to print an error.
> 
> This should reduce amount of false reports from users seeing this
> warning while having wireless working perfectly fine.

I think FW_OPT_NO_WARN does not cover all warnings in firmware_class
although I did not check. Anyway...

Acked-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
> Signed-off-by: RafaÅ MiÅecki <rafal@xxxxxxxxxx>
> ---
> V2: Update commit message as it wasn't clear enough (thanks Andy) & add extra
>     messages to the firmware.c.
> V3: Set FW_OPT_UEVENT to don't change behavior
> 
> Kalle, Arend: this patch is strictly related to the bigger 1/2. Could you ack
> this change as I expect this patchset to be picked by Ming, Luis or Greg?
> ---
>  .../net/wireless/broadcom/brcm80211/brcmfmac/firmware.c | 17 ++++++++++++-----
>  1 file changed, 12 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> index c7c1e9906500..6dbcceff2529 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> @@ -462,8 +462,14 @@ static void brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx)
>  		raw_nvram = false;
>  	} else {
>  		data = bcm47xx_nvram_get_contents(&data_len);
> -		if (!data && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL))
> -			goto fail;
> +		if (!data) {
> +			brcmf_dbg(TRACE, "Failed to get platform NVRAM\n");
> +			if (!(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL)) {
> +				brcmf_err("Loading NVRAM from %s and using platform one both failed\n",
> +					  fwctx->nvram_name);
> +				goto fail;
> +			}
> +		}
>  		raw_nvram = true;
>  	}
>  
> @@ -504,9 +510,10 @@ static void brcmf_fw_request_code_done(const struct firmware *fw, void *ctx)
>  		return;
>  	}
>  	fwctx->code = fw;
> -	ret = request_firmware_nowait(THIS_MODULE, true, fwctx->nvram_name,
> -				      fwctx->dev, GFP_KERNEL, fwctx,
> -				      brcmf_fw_request_nvram_done);
> +	ret = request_firmware_async(THIS_MODULE,
> +				     FW_OPT_UEVENT | FW_OPT_NO_WARN,
> +				     fwctx->nvram_name, fwctx->dev, GFP_KERNEL,
> +				     fwctx, brcmf_fw_request_nvram_done);