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authorHuzefa Kankroliwala <huzefa.nomanx.kankroliwala@intel.com>2013-04-03 05:45:21 -0700
committerJiri Kosina <jkosina@suse.cz>2013-04-04 09:59:32 +0200
commit7c4d577367fb710ea74a56955c5e3546fe5dd7ac (patch)
tree2e30de664d1f64d122a49b19604916f873f3fcdb /drivers/hid
parent83a44ac8bf4a8e6cbbf0c00ff281a482778f708a (diff)
HID: i2c-hid: fix length for set/get report in i2c hid
With the current i2c hid driver set/get report does not work as expected, for e.g sensor hub properties like power state, frequency etc is not set properly on the device as a result we do not get events. The problem is that i2c hid driver in function i2c_hid_request sets length equal to default buffer size for which the sensor hub does not respond on get/set commands. Use report length and calculate it based on report size and id. Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Huzefa Kankroliwala <huzefa.nomanx.kankroliwala@intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/i2c-hid/i2c-hid.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 935f387be95a..2b1799a3b212 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -567,18 +567,17 @@ static void i2c_hid_request(struct hid_device *hid, struct hid_report *rep,
int reqtype)
{
struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
char *buf;
int ret;
+ int len = i2c_hid_get_report_length(rep) - 2;
- buf = kzalloc(ihid->bufsize, GFP_KERNEL);
+ buf = kzalloc(len, GFP_KERNEL);
if (!buf)
return;
switch (reqtype) {
case HID_REQ_GET_REPORT:
- ret = i2c_hid_get_raw_report(hid, rep->id, buf, ihid->bufsize,
- rep->type);
+ ret = i2c_hid_get_raw_report(hid, rep->id, buf, len, rep->type);
if (ret < 0)
dev_err(&client->dev, "%s: unable to get report: %d\n",
__func__, ret);
@@ -587,7 +586,7 @@ static void i2c_hid_request(struct hid_device *hid, struct hid_report *rep,
break;
case HID_REQ_SET_REPORT:
hid_output_report(rep, buf);
- i2c_hid_output_raw_report(hid, buf, ihid->bufsize, rep->type);
+ i2c_hid_output_raw_report(hid, buf, len, rep->type);
break;
}