diff options
Diffstat (limited to 'arch/x86/lguest/boot.c')
| -rw-r--r-- | arch/x86/lguest/boot.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 3847e736702e..25da5bc8d83d 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -1233,8 +1233,6 @@ static void write_bar_via_cfg(u32 cfg_offset, u32 off, u32 val) static void probe_pci_console(void) { u8 cap, common_cap = 0, device_cap = 0; - /* Offset within BAR0 */ - u32 device_offset; u32 device_len; /* Avoid recursive printk into here. */ @@ -1258,24 +1256,16 @@ static void probe_pci_console(void) u8 vndr = read_pci_config_byte(0, 1, 0, cap); if (vndr == PCI_CAP_ID_VNDR) { u8 type, bar; - u32 offset, length; type = read_pci_config_byte(0, 1, 0, cap + offsetof(struct virtio_pci_cap, cfg_type)); bar = read_pci_config_byte(0, 1, 0, cap + offsetof(struct virtio_pci_cap, bar)); - offset = read_pci_config(0, 1, 0, - cap + offsetof(struct virtio_pci_cap, offset)); - length = read_pci_config(0, 1, 0, - cap + offsetof(struct virtio_pci_cap, length)); switch (type) { case VIRTIO_PCI_CAP_DEVICE_CFG: - if (bar == 0) { + if (bar == 0) device_cap = cap; - device_offset = offset; - device_len = length; - } break; case VIRTIO_PCI_CAP_PCI_CFG: console_access_cap = cap; @@ -1297,13 +1287,16 @@ static void probe_pci_console(void) * emerg_wr. If it doesn't support VIRTIO_CONSOLE_F_EMERG_WRITE * it should ignore the access. */ + device_len = read_pci_config(0, 1, 0, + device_cap + offsetof(struct virtio_pci_cap, length)); if (device_len < (offsetof(struct virtio_console_config, emerg_wr) + sizeof(u32))) { printk(KERN_ERR "lguest: console missing emerg_wr field\n"); return; } - console_cfg_offset = device_offset; + console_cfg_offset = read_pci_config(0, 1, 0, + device_cap + offsetof(struct virtio_pci_cap, offset)); printk(KERN_INFO "lguest: Console via virtio-pci emerg_wr\n"); } |