diff options
Diffstat (limited to 'drivers/tty/hvc')
| -rw-r--r-- | drivers/tty/hvc/hvc_opal.c | 2 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_xen.c | 31 |
2 files changed, 18 insertions, 15 deletions
diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c index ced26c8ccd57..0d2ea0c224c3 100644 --- a/drivers/tty/hvc/hvc_opal.c +++ b/drivers/tty/hvc/hvc_opal.c @@ -401,7 +401,7 @@ out: } #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL_RAW -void __init udbg_init_debug_opal(void) +void __init udbg_init_debug_opal_raw(void) { u32 index = CONFIG_PPC_EARLY_DEBUG_OPAL_VTERMNO; hvc_opal_privs[index] = &hvc_opal_boot_priv; diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c index d3d91dae065c..944eaeb8e0cf 100644 --- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -214,24 +214,24 @@ static int xen_hvm_console_init(void) /* already configured */ if (info->intf != NULL) return 0; - + /* + * If the toolstack (or the hypervisor) hasn't set these values, the + * default value is 0. Even though mfn = 0 and evtchn = 0 are + * theoretically correct values, in practice they never are and they + * mean that a legacy toolstack hasn't initialized the pv console correctly. + */ r = hvm_get_parameter(HVM_PARAM_CONSOLE_EVTCHN, &v); - if (r < 0) { - kfree(info); - return -ENODEV; - } + if (r < 0 || v == 0) + goto err; info->evtchn = v; - hvm_get_parameter(HVM_PARAM_CONSOLE_PFN, &v); - if (r < 0) { - kfree(info); - return -ENODEV; - } + v = 0; + r = hvm_get_parameter(HVM_PARAM_CONSOLE_PFN, &v); + if (r < 0 || v == 0) + goto err; mfn = v; info->intf = ioremap(mfn << PAGE_SHIFT, PAGE_SIZE); - if (info->intf == NULL) { - kfree(info); - return -ENODEV; - } + if (info->intf == NULL) + goto err; info->vtermno = HVC_COOKIE; spin_lock(&xencons_lock); @@ -239,6 +239,9 @@ static int xen_hvm_console_init(void) spin_unlock(&xencons_lock); return 0; +err: + kfree(info); + return -ENODEV; } static int xen_pv_console_init(void) |