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Kernel/USB: Explicitely copy descriptor.hub_characteristics for printing
This field is in a packed struct, which makes it possibly misaligned. This knowledge is lost when invoking `dbgln` triggering an unaligned access to it, aka UB. By explicitely copying it we avoid this issue.
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@ -72,7 +72,7 @@ ErrorOr<void> Hub::enumerate_and_power_on_hub()
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if constexpr (USB_DEBUG) {
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dbgln("USB Hub Descriptor for {:04x}:{:04x}", m_vendor_id, m_product_id);
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dbgln("Number of Downstream Ports: {}", descriptor.number_of_downstream_ports);
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dbgln("Hub Characteristics: 0x{:04x}", descriptor.hub_characteristics);
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dbgln("Hub Characteristics: 0x{:04x}", static_cast<u16>(descriptor.hub_characteristics));
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dbgln("Power On to Power Good Time: {} ms ({} * 2ms)", descriptor.power_on_to_power_good_time * 2, descriptor.power_on_to_power_good_time);
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dbgln("Hub Controller Current: {} mA", descriptor.hub_controller_current);
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}
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