RE: [PATCH v3 3/6] staging: r8188eu: add error handling of rtw_read8

[David Laight]

From: Pavel Skripkin
> Sent: 24 August 2021 08:27
> 
> _rtw_read8 function can fail in case of usb transfer failure. But
> previous function prototype wasn't designed to return an error to
> caller. It can cause a lot uninit value bugs all across the driver code,
> since rtw_read8() returns local stack variable to caller.
> 
> Fix it by changing the prototype of this function. Now it returns an
> int: 0 on success, negative error value on failure and callers should pass
> the pointer to storage location for register value.

...
> +		len += snprintf(page + len, count - len, "rtw_read8(0x%x)=0x%x\n",
> +				proc_get_read_addr, (u8) tmp);

That is broken.

	David

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