提交 f9ed432c 编写于 作者: L Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid

Pull HID fixes from Jiri Kosina:
 - fix hid-sony PS3 sixaxxis breakage from Benjamin Tissories
 - fix hidraw race condition from Yonghua Zheng
 - fix/bandaid for rare device enumeration problems of Logitech Unifying
   receivers from Nestor Lopez Casado

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: hidraw: fix improper mutex release
  HID: sony: fix HID mapping for PS3 sixaxis controller
  HID: hid-logitech-dj: querying_devices was never set
  HID: Revert "Revert "HID: Fix logitech-dj: missing Unifying device issue""
......@@ -192,6 +192,7 @@ static struct hid_ll_driver logi_dj_ll_driver;
static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf,
size_t count,
unsigned char report_type);
static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev);
static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev,
struct dj_report *dj_report)
......@@ -232,6 +233,7 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
SPFUNCTION_DEVICE_LIST_EMPTY) {
dbg_hid("%s: device list is empty\n", __func__);
djrcv_dev->querying_devices = false;
return;
}
......@@ -242,6 +244,12 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
return;
}
if (djrcv_dev->paired_dj_devices[dj_report->device_index]) {
/* The device is already known. No need to reallocate it. */
dbg_hid("%s: device is already known\n", __func__);
return;
}
dj_hiddev = hid_allocate_device();
if (IS_ERR(dj_hiddev)) {
dev_err(&djrcv_hdev->dev, "%s: hid_allocate_device failed\n",
......@@ -305,6 +313,7 @@ static void delayedwork_callback(struct work_struct *work)
struct dj_report dj_report;
unsigned long flags;
int count;
int retval;
dbg_hid("%s\n", __func__);
......@@ -337,6 +346,25 @@ static void delayedwork_callback(struct work_struct *work)
logi_dj_recv_destroy_djhid_device(djrcv_dev, &dj_report);
break;
default:
/* A normal report (i. e. not belonging to a pair/unpair notification)
* arriving here, means that the report arrived but we did not have a
* paired dj_device associated to the report's device_index, this
* means that the original "device paired" notification corresponding
* to this dj_device never arrived to this driver. The reason is that
* hid-core discards all packets coming from a device while probe() is
* executing. */
if (!djrcv_dev->paired_dj_devices[dj_report.device_index]) {
/* ok, we don't know the device, just re-ask the
* receiver for the list of connected devices. */
retval = logi_dj_recv_query_paired_devices(djrcv_dev);
if (!retval) {
/* everything went fine, so just leave */
break;
}
dev_err(&djrcv_dev->hdev->dev,
"%s:logi_dj_recv_query_paired_devices "
"error:%d\n", __func__, retval);
}
dbg_hid("%s: unexpected report type\n", __func__);
}
}
......@@ -367,6 +395,12 @@ static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
if (!djdev) {
dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
" is NULL, index %d\n", dj_report->device_index);
kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
if (schedule_work(&djrcv_dev->work) == 0) {
dbg_hid("%s: did not schedule the work item, was already "
"queued\n", __func__);
}
return;
}
......@@ -397,6 +431,12 @@ static void logi_dj_recv_forward_report(struct dj_receiver_dev *djrcv_dev,
if (dj_device == NULL) {
dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
" is NULL, index %d\n", dj_report->device_index);
kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
if (schedule_work(&djrcv_dev->work) == 0) {
dbg_hid("%s: did not schedule the work item, was already "
"queued\n", __func__);
}
return;
}
......@@ -444,6 +484,12 @@ static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
struct dj_report *dj_report;
int retval;
/* no need to protect djrcv_dev->querying_devices */
if (djrcv_dev->querying_devices)
return 0;
djrcv_dev->querying_devices = true;
dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
if (!dj_report)
return -ENOMEM;
......@@ -455,6 +501,7 @@ static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
return retval;
}
static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
unsigned timeout)
{
......
......@@ -101,6 +101,7 @@ struct dj_receiver_dev {
struct work_struct work;
struct kfifo notif_fifo;
spinlock_t lock;
bool querying_devices;
};
struct dj_device {
......
......@@ -369,7 +369,8 @@ static int sony_mapping(struct hid_device *hdev, struct hid_input *hi,
if (sc->quirks & PS3REMOTE)
return ps3remote_mapping(hdev, hi, field, usage, bit, max);
return -1;
/* Let hid-core decide for the others */
return 0;
}
/*
......
......@@ -518,7 +518,6 @@ int hidraw_connect(struct hid_device *hid)
goto out;
}
mutex_unlock(&minors_lock);
init_waitqueue_head(&dev->wait);
INIT_LIST_HEAD(&dev->list);
......@@ -528,6 +527,7 @@ int hidraw_connect(struct hid_device *hid)
dev->exist = 1;
hid->hidraw = dev;
mutex_unlock(&minors_lock);
out:
return result;
......
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