Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx> wrote: > > This procedure for reading efuse bytes relies in a loop that performs an > I/O read up to *10k* times in case of failures. We measured the time of > the loop inside read_efuse_byte() alone, and in this reproducer (which > involves the dummy_hcd emulation layer), it takes 15 seconds each. The I/O read of 10k times is to polling if efuse is ready, and then following statement is to actually read efuse content back. For USB devices, I/O is slow, so it might be fine to reduce retry times. But For PCIE devices, I think this will be risky without testing with real hardware. Possible way is to use "rtlhal->interface == INTF_PCI" to keep original times for PCIE devices, and only reduce retry times for USB devices. But USB can operate on USB-2/-3 modes, so maybe still need experiments with real hardware to get reasonable retry times.
