diff options
| author | hselasky <hselasky@FreeBSD.org> | 2015-06-17 07:41:53 +0000 |
|---|---|---|
| committer | hselasky <hselasky@FreeBSD.org> | 2015-06-17 07:41:53 +0000 |
| commit | 46e7b2b082c772cd1bc03b7398cd04f046efa61a (patch) | |
| tree | 2d70ee319cfa0dd6d0fcb3e5b3075c5b05dca204 /sys/dev/pci | |
| parent | 1786513a8dec318f224361d099419987e8e9a761 (diff) | |
| download | FreeBSD-src-46e7b2b082c772cd1bc03b7398cd04f046efa61a.zip FreeBSD-src-46e7b2b082c772cd1bc03b7398cd04f046efa61a.tar.gz | |
MFC r284012:
Disable VGA PCI interrupts until a chipset driver is loaded for VGA
PCI devices. Else unhandled display adapter interrupts might freeze
the CPU or consume a lot of CPU.
PR: 156596
Diffstat (limited to 'sys/dev/pci')
| -rw-r--r-- | sys/dev/pci/vga_pci.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/dev/pci/vga_pci.c b/sys/dev/pci/vga_pci.c index 6e733f5..835293c 100644 --- a/sys/dev/pci/vga_pci.c +++ b/sys/dev/pci/vga_pci.c @@ -125,6 +125,13 @@ vga_pci_is_boot_display(device_t dev) if ((config & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN)) == 0) return (0); + /* + * Disable interrupts until a chipset driver is loaded for + * this PCI device. Else unhandled display adapter interrupts + * might freeze the CPU. + */ + pci_write_config(dev, PCIR_COMMAND, config | PCIM_CMD_INTxDIS, 2); + /* This video card is the boot display: record its unit number. */ vga_pci_default_unit = unit; device_set_flags(dev, 1); |
