diff options
Diffstat (limited to 'kernels/linux-libre-lts-knock/3.10.6-logitech-dj.patch')
| -rw-r--r-- | kernels/linux-libre-lts-knock/3.10.6-logitech-dj.patch | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/kernels/linux-libre-lts-knock/3.10.6-logitech-dj.patch b/kernels/linux-libre-lts-knock/3.10.6-logitech-dj.patch deleted file mode 100644 index 1c112ccde..000000000 --- a/kernels/linux-libre-lts-knock/3.10.6-logitech-dj.patch +++ /dev/null @@ -1,172 +0,0 @@ -From c63e0e370028d7e4033bd40165f18499872b5183 Mon Sep 17 00:00:00 2001 -From: Nestor Lopez Casado <nlopezcasad@logitech.com> -Date: Thu, 18 Jul 2013 13:21:30 +0000 -Subject: HID: Revert "Revert "HID: Fix logitech-dj: missing Unifying device issue"" - -This reverts commit 8af6c08830b1ae114d1a8b548b1f8b056e068887. - -This patch re-adds the workaround introduced by 596264082f10dd4 -which was reverted by 8af6c08830b1ae114. - -The original patch 596264 was needed to overcome a situation where -the hid-core would drop incoming reports while probe() was being -executed. - -This issue was solved by c849a6143bec520af which added -hid_device_io_start() and hid_device_io_stop() that enable a specific -hid driver to opt-in for input reports while its probe() is being -executed. - -Commit a9dd22b730857347 modified hid-logitech-dj so as to use the -functionality added to hid-core. Having done that, workaround 596264 -was no longer necessary and was reverted by 8af6c08. - -We now encounter a different problem that ends up 'again' thwarting -the Unifying receiver enumeration. The problem is time and usb controller -dependent. Ocasionally the reports sent to the usb receiver to start -the paired devices enumeration fail with -EPIPE and the receiver never -gets to enumerate the paired devices. - -With dcd9006b1b053c7b1c the problem was "hidden" as the call to the usb -driver became asynchronous and none was catching the error from the -failing URB. - -As the root cause for this failing SET_REPORT is not understood yet, --possibly a race on the usb controller drivers or a problem with the -Unifying receiver- reintroducing this workaround solves the problem. - -Overall what this workaround does is: If an input report from an -unknown device is received, then a (re)enumeration is performed. - -related bug: -https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1194649 - -Signed-off-by: Nestor Lopez Casado <nlopezcasad@logitech.com> -Signed-off-by: Jiri Kosina <jkosina@suse.cz> ---- -diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c -index 5207591a..cd33084 100644 ---- a/drivers/hid/hid-logitech-dj.c -+++ b/drivers/hid/hid-logitech-dj.c -@@ -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 +484,10 @@ 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; -+ - dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); - if (!dj_report) - return -ENOMEM; -@@ -455,6 +499,7 @@ 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) - { -diff --git a/drivers/hid/hid-logitech-dj.h b/drivers/hid/hid-logitech-dj.h -index fd28a5e..4a40003 100644 ---- a/drivers/hid/hid-logitech-dj.h -+++ b/drivers/hid/hid-logitech-dj.h -@@ -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 { --- -cgit v0.9.2 |