From: Niklas Söderlund <niklas.soderlund@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Acked-by: Huang Ying <ying.huang@xxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
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 5b898d4..bb20b03 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),
--
1.7.9.rc2
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