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Diffstat (limited to 'arch/x86/lguest/boot.c')
-rw-r--r--arch/x86/lguest/boot.c17
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 3847e7367..25da5bc8d 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");
}