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Kernel: Use TRY() some more in USB::Hub

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This commit is contained in:
Andreas Kling 2021-09-05 21:37:06 +02:00
parent 8ceff65161
commit 4d961387c1
2 changed files with 11 additions and 15 deletions
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16
Kernel/Bus/USB/USBHub.cpp
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@ -15,24 +15,18 @@ namespace Kernel::USB {
KResultOr<NonnullRefPtr<Hub>> Hub::try_create_root_hub(NonnullRefPtr<USBController> controller, DeviceSpeed device_speed)
{
auto pipe = TRY(Pipe::try_create_pipe(controller, Pipe::Type::Control, Pipe::Direction::Bidirectional, 0, 8, 0));
auto hub = try_make_ref_counted<Hub>(controller, device_speed, move(pipe));
if (!hub)
return ENOMEM;
// NOTE: Enumeration does not happen here, as the controller must know what the device address is at all times during enumeration to intercept requests.
return hub.release_nonnull();
auto pipe = TRY(Pipe::try_create_pipe(controller, Pipe::Type::Control, Pipe::Direction::Bidirectional, 0, 8, 0));
auto hub = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Hub(controller, device_speed, move(pipe))));
return hub;
}
KResultOr<NonnullRefPtr<Hub>> Hub::try_create_from_device(Device const& device)
{
auto pipe = TRY(Pipe::try_create_pipe(device.controller(), Pipe::Type::Control, Pipe::Direction::Bidirectional, 0, device.device_descriptor().max_packet_size, device.address()));
auto hub = try_make_ref_counted<Hub>(device, move(pipe));
if (!hub)
return ENOMEM;
auto hub = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Hub(device, move(pipe))));
TRY(hub->enumerate_and_power_on_hub());
return hub.release_nonnull();
return hub;
}
Hub::Hub(NonnullRefPtr<USBController> controller, DeviceSpeed device_speed, NonnullOwnPtr<Pipe> default_pipe)