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Kernel: Don't allow sending commands to halted xHCI

This commit is contained in:
Bananymous 2024-11-22 22:19:29 +02:00
parent fb1ffec5bb
commit c1d8790623
1 changed files with 7 additions and 0 deletions
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7
kernel/kernel/USB/XHCI/Controller.cpp
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@ -404,6 +404,13 @@ namespace Kernel
{ {
LockGuard _(m_mutex); LockGuard _(m_mutex);
auto& operational = operational_regs();
if (operational.usbsts & XHCI::USBSTS::HCHalted)
{
dwarnln("Trying to send a command on a halted controller");
return BAN::Error::from_errno(EFAULT);
}
auto& command_trb = reinterpret_cast<volatile XHCI::TRB*>(m_command_ring_region->vaddr())[m_command_enqueue]; auto& command_trb = reinterpret_cast<volatile XHCI::TRB*>(m_command_ring_region->vaddr())[m_command_enqueue];
command_trb.raw.dword0 = trb.raw.dword0; command_trb.raw.dword0 = trb.raw.dword0;
command_trb.raw.dword1 = trb.raw.dword1; command_trb.raw.dword1 = trb.raw.dword1;