dell-smbios: implement new function for finding DMI table 0xDA tokens

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>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
index 2577cf6aff0f..6a27e4c85a24 100644
--- a/drivers/platform/x86/dell-smbios.c
+++ b/drivers/platform/x86/dell-smbios.c
@@ -77,6 +77,19 @@ 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;