Martin Kaistra <martin.kaistra@xxxxxxxxxxxxx> wrote: > Hi Ping-Ke, hi Bitterblue, > > I have a problem with the rtl8xxxu driver and 8188f, but only on some boards. > More specifically, I can see that during the second channel switch (which > happens when I do "iw dev wlan0 scan"), the rtl8xxxu_read32(0e08) returns -110 > (ETIMEDOUT) and after that no reads or writes work anymore until I unload and > reload the driver. If this symptom is 100% reproducible, I would add many rtl8xxxu_read32(0xe08) somewhere to bisect the cause resulting from writing IO or certain H2C commands. Example 1: rtl8xxxu_write32(0x1234) // original code rtl8xxxu_read32(0xe08) // add this to see if problem encounters? Example 2: rtl8xxxu_gen2_h2c_cmd() // original code mdelay(50) // add some delay to wait firmware complete the work rtl8xxxu_read32(0xe08) // add this to see if problem encounters? The address of 0xe08 is not always on, so you should read it after power-on.
