From 4ceacd02f5a1795c5c697e0345ee10beef675290 Mon Sep 17 00:00:00 2001
From: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Date: Wed, 26 Nov 2014 22:01:14 +0800
Subject: [PATCH] ACPI / table: Always count matched and successfully parsed
entries
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.
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/tables.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index f1debe97dcfc..93b81523a2fe 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -224,10 +224,13 @@ acpi_parse_entries(char *id, unsigned long table_size,
while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
table_end) {
if (entry->type == entry_id
- && (!max_entries || count++ < max_entries))
+ && (!max_entries || count < max_entries)) {
if (handler(entry, table_end))
return -EINVAL;
+ count++;
+ }
+
/*
* If entry->length is 0, break from this loop to avoid
* infinite loop.
--
2.34.1