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path: root/drivers/hid/hid-logitech-dj.h
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2013-07-22HID: Revert "Revert "HID: Fix logitech-dj: missing Unifying device issue""Nestor Lopez Casado
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>
2013-03-01Revert "HID: Fix logitech-dj: missing Unifying device issue"Andrew de los Reyes
This reverts commit 596264082f10dd4a567c43d4526b2f54ac5520bc. The reverted commit was a workaround needed when drivers became unable to communicate with devices during probe(). Now that such communication is possible, the workaround is not needed. Signed-off-by: Andrew de los Reyes <adlr@chromium.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-09-22HID: Fix logitech-dj: missing Unifying device issueNestor Lopez Casado
This patch fixes an issue introduced after commit 4ea5454203d991ec ("HID: Fix race condition between driver core and ll-driver"). After that commit, hid-core discards any incoming packet that arrives while hid driver's probe function is being executed. This broke the enumeration process of hid-logitech-dj, that must receive control packets in-band with the mouse and keyboard packets. Discarding mouse or keyboard data at the very begining is usually fine, but it is not the case for control packets. This patch forces a re-enumeration of the paired devices when a packet arrives that comes from an unknown device. Based on a patch originally written by Benjamin Tissoires. Cc: stable@vger.kernel.org # v3.2+ Signed-off-by: Nestor Lopez Casado <nlopezcasad@logitech.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-09-20HID: hid-logitech-dj: fix off by oneNestor Lopez Casado
There is a bug where a device with index 6 would write out of bounds in the array of paired devices. This patch fixes that problem. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> Reviewed-by: Olivier Gay <ogay@logitech.com> Signed-off-by: Nestor Lopez Casado <nlopezcasad@logitech.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-09-15HID: Add full support for Logitech Unifying receiversNestor Lopez Casado
With this driver, all the devices paired to a single Unifying receiver are exposed to user processes in separated /input/dev nodes. Keyboards with different layouts can be treated differently, Multiplayer games on single PC (like home theater PC) can differentiate input coming from different kbds paired to the same receiver. Up to now, when Logitech Unifying receivers are connected to a Linux based system, a single keyboard and a single mouse are presented to the HID Layer, even if the Unifying receiver can pair up to six compatible devices. The Unifying receiver by default multiplexes all incoming events (from multiple keyboards/mice) into these two. Signed-off-by: Nestor Lopez Casado <nlopezcasad@logitech.com> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>