diff options
Diffstat (limited to 'fs/pstore/ram.c')
| -rw-r--r-- | fs/pstore/ram.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 5b7709894415..2bb3468fc93a 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -655,6 +655,7 @@ static int ramoops_parse_dt(struct platform_device *pdev, struct ramoops_platform_data *pdata) { struct device_node *of_node = pdev->dev.of_node; + struct device_node *parent_node; struct resource *res; u32 value; int ret; @@ -689,6 +690,26 @@ static int ramoops_parse_dt(struct platform_device *pdev, #undef parse_size + /* + * Some old Chromebooks relied on the kernel setting the + * console_size and pmsg_size to the record size since that's + * what the downstream kernel did. These same Chromebooks had + * "ramoops" straight under the root node which isn't + * according to the current upstream bindings (though it was + * arguably acceptable under a prior version of the bindings). + * Let's make those old Chromebooks work by detecting that + * we're not a child of "reserved-memory" and mimicking the + * expected behavior. + */ + parent_node = of_get_parent(of_node); + if (!of_node_name_eq(parent_node, "reserved-memory") && + !pdata->console_size && !pdata->ftrace_size && + !pdata->pmsg_size && !pdata->ecc_info.ecc_size) { + pdata->console_size = pdata->record_size; + pdata->pmsg_size = pdata->record_size; + } + of_node_put(parent_node); + return 0; } |