From: Shannon Zhao <shannon.z...@linaro.org>
acpi_parse_entries() allows to traverse all available table entries (aka
subtables) by passing max_entries parameter equal to 0, but since its count
variable is only incremented if max_entries is not 0, the function always
returns 0 for max_entries equal to 0. It would be more useful if it returned
the number of entries matched instead, so make it increment count in that
case too.
Signed-off-by: Tomasz Nowicki <tomasz.nowi...@linaro.org>
Signed-off-by: Shannon Zhao <shannon.z...@linaro.org>
---
xen/drivers/acpi/tables.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/xen/drivers/acpi/tables.c b/xen/drivers/acpi/tables.c
index 1beca79..822689e 100644
--- a/xen/drivers/acpi/tables.c
+++ b/xen/drivers/acpi/tables.c
@@ -240,10 +240,13 @@ acpi_table_parse_entries(char *id,
}
if (entry->type == entry_id
- && (!max_entries || count++ < max_entries))
+ && (!max_entries || count < max_entries)) {
if (handler(entry, table_end))
return -EINVAL;
+ count++;
+ }
+
entry = (struct acpi_subtable_header *)
((unsigned long)entry + entry->length);
}
--
2.0.4
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