xen-netback: Handle backend state transitions in a more robust way

[~andy/linux] / drivers / hid / hid-core.c

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index be52c06dbe30a8d1e40d0adb9b764d53a1dc3b44..b8470b1a10fe8b40bef83386a0476591e5a067d7 100644 (file)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -94,7 +94,6 @@ EXPORT_SYMBOL_GPL(hid_register_report);
 static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
 {
        struct hid_field *field;
-       int i;
 
        if (report->maxfield == HID_MAX_FIELDS) {
                hid_err(report->device, "too many fields in report\n");
@@ -113,9 +112,6 @@ static struct hid_field *hid_register_field(struct hid_report *report, unsigned
        field->value = (s32 *)(field->usage + usages);
        field->report = report;
 
-       for (i = 0; i < usages; i++)
-               field->usage[i].usage_index = i;
-
        return field;
 }
 
@@ -226,9 +222,9 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
 {
        struct hid_report *report;
        struct hid_field *field;
-       int usages;
+       unsigned usages;
        unsigned offset;
-       int i;
+       unsigned i;
 
        report = hid_register_report(parser->device, report_type, parser->global.report_id);
        if (!report) {
@@ -255,7 +251,8 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
        if (!parser->local.usage_index) /* Ignore padding fields */
                return 0;
 
-       usages = max_t(int, parser->local.usage_index, parser->global.report_count);
+       usages = max_t(unsigned, parser->local.usage_index,
+                                parser->global.report_count);
 
        field = hid_register_field(report, usages, parser->global.report_count);
        if (!field)
@@ -266,13 +263,14 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
        field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
 
        for (i = 0; i < usages; i++) {
-               int j = i;
+               unsigned j = i;
                /* Duplicate the last usage we parsed if we have excess values */
                if (i >= parser->local.usage_index)
                        j = parser->local.usage_index - 1;
                field->usage[i].hid = parser->local.usage[j];
                field->usage[i].collection_index =
                        parser->local.collection_index[j];
+               field->usage[i].usage_index = i;
        }
 
        field->maxusage = usages;
@@ -1354,7 +1352,7 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
                        goto out;
        }
 
-       if (hid->claimed != HID_CLAIMED_HIDRAW) {
+       if (hid->claimed != HID_CLAIMED_HIDRAW && report->maxfield) {
                for (a = 0; a < report->maxfield; a++)
                        hid_input_field(hid, report->field[a], cdata, interrupt);
                hdrv = hid->driver;