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Kernel: Only update USB max packet size for FS devices

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Bananymous
2026-08-22 11:57:19 +03:00
parent 4b7d90f939
commit b818e2764c
1 changed files with 6 additions and 7 deletions
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kernel/kernel/USB/XHCI/Device.cpp
+6 -7
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@@ -113,7 +113,8 @@ namespace Kernel
TRY(m_controller.send_command(address_device));
}
TRY(update_actual_max_packet_size());
if (m_speed_class == USB::SpeedClass::FullSpeed)
TRY(update_actual_max_packet_size());
return {};
}
@@ -134,18 +135,16 @@ namespace Kernel
request.wLength = 8;
TRY(send_request(request, response_region->paddr()));
uint8_t bMaxPacketSize0;
PageTable::with_fast_page(response_region->paddr(), [&bMaxPacketSize0] {
bMaxPacketSize0 = PageTable::fast_page_as_sized<uint8_t>(7);
});
dprintln_if(DEBUG_XHCI, "Got device descriptor");
const uint8_t bMaxPacketSize0 = reinterpret_cast<const uint8_t*>(response_region->vaddr())[7];
const bool is_usb3 = (m_speed_class == USB::SpeedClass::SuperSpeed);
const uint32_t new_max_packet_size = is_usb3 ? 1u << bMaxPacketSize0 : bMaxPacketSize0;
if (m_endpoints[0].max_packet_size == new_max_packet_size)
{
dprintln_if(DEBUG_XHCI, "No need to update max packet size");
return {};
}
m_endpoints[0].max_packet_size = new_max_packet_size;