diff options
| author | Niklas Söderlund <niklas.soderlund@ericsson.com> | 2012-01-09 19:49:44 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-01-24 04:31:11 +0400 |
| commit | 4c40aed869a200a621b53bcb491c5ee8a34ef5f1 (patch) | |
| tree | a40591412b41866bf6b4403be6d64f570329973d /drivers | |
| parent | 1001a3a307ca2425c028fd23b8ad05ad8bb048dd (diff) | |
| download | linux-4c40aed869a200a621b53bcb491c5ee8a34ef5f1.tar.xz | |
ACPI, APEI, EINJ Allow empty Trigger Error Action Table
According to the ACPI spec [1] section 18.6.4 the TRIGGER_ERROR action
table can consists of zero elements.
[1] Advanced Configuration and Power Interface Specification
Revision 5.0, December 6, 2011
http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
Signed-off-by: Niklas Söderlund <niklas.soderlund@ericsson.com>
Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/apei/einj.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c index 5b898d4dda99..bb20b03ddc39 100644 --- a/drivers/acpi/apei/einj.c +++ b/drivers/acpi/apei/einj.c @@ -276,7 +276,7 @@ static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab) if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger)) return -EINVAL; if (trigger_tab->table_size > PAGE_SIZE || - trigger_tab->table_size <= trigger_tab->header_size) + trigger_tab->table_size < trigger_tab->header_size) return -EINVAL; if (trigger_tab->entry_count != (trigger_tab->table_size - trigger_tab->header_size) / @@ -340,6 +340,11 @@ static int __einj_error_trigger(u64 trigger_paddr, u32 type, "The trigger error action table is invalid\n"); goto out_rel_header; } + + /* No action structures in the TRIGGER_ERROR table, nothing to do */ + if (!trigger_tab->entry_count) + goto out_rel_header; + rc = -EIO; table_size = trigger_tab->table_size; r = request_mem_region(trigger_paddr + sizeof(*trigger_tab), |