[PATCH v2 10/16] dell-smbios: implement new function for finding DMI table 0xDA tokens

["Michał Kępień" <kernel@kempniu.pl>]

Ultimately, the da_tokens table should not be exported from dell-smbios.
Currently, in some cases, dell-laptop accesses that table's members
directly, so implement a new function, dell_smbios_find_token(), which
returns a pointer to an entry inside the da_tokens table with the given
token ID (or NULL if it is not found).

Signed-off-by: Michał Kępień <kernel@kempniu.pl>
---
 drivers/platform/x86/dell-smbios.c |   13 +++++++++++++
 drivers/platform/x86/dell-smbios.h |    2 ++
 2 files changed, 15 insertions(+)

diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
index b383d0d..43aafab 100644
--- a/drivers/platform/x86/dell-smbios.c
+++ b/drivers/platform/x86/dell-smbios.c
@@ -76,6 +76,19 @@ void dell_smbios_send_request(int class, int select)
 }
 EXPORT_SYMBOL_GPL(dell_smbios_send_request);
 
+struct calling_interface_token *dell_smbios_find_token(int tokenid)
+{
+	int i;
+
+	for (i = 0; i < da_num_tokens; i++) {
+		if (da_tokens[i].tokenID == tokenid)
+			return &da_tokens[i];
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(dell_smbios_find_token);
+
 int find_token_id(int tokenid)
 {
 	int i;
diff --git a/drivers/platform/x86/dell-smbios.h b/drivers/platform/x86/dell-smbios.h
index af653ff..6f6dbe8 100644
--- a/drivers/platform/x86/dell-smbios.h
+++ b/drivers/platform/x86/dell-smbios.h
@@ -42,6 +42,8 @@ void dell_smbios_clear_buffer(void);
 void dell_smbios_release_buffer(void);
 void dell_smbios_send_request(int class, int select);
 
+struct calling_interface_token *dell_smbios_find_token(int tokenid);
+
 int find_token_id(int tokenid);
 int find_token_location(int tokenid);
 #endif
-- 
1.7.10.4