diff options
| author | Jim Keir <jimkeir@oracledbadirect.com> | 2015-01-23 20:21:12 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2015-01-26 23:26:30 +0300 |
| commit | afd700d933963d07391e3e3dfbfbc05e905960ef (patch) | |
| tree | 063934f6d0e4467c70a50da8766b4868a429926a | |
| parent | 3458e4c0e5f8783ae699e1205062d1fdd2a48cca (diff) | |
| download | linux-afd700d933963d07391e3e3dfbfbc05e905960ef.tar.xz | |
HID: pidff: Fix initialisation forMicrosoft Sidewinder FF Pro 2
The FF2 driver (usbhid/hid-pidff.c) sends commands to the stick during ff_init.
However, this is called inside a block where driver_input_lock is locked, so
the results of these initial commands are discarded. This behavior is the
"killer", without this nothing else works.
ff_init issues commands using "hid_hw_request". This eventually goes to
hid_input_report, which returns -EBUSY because driver_input_lock is locked. The
change is to delay the ff_init call in hid-core.c until after this lock has
been released.
Calling hid_device_io_start() releases the lock so the device can be
configured. We also need to call hid_device_io_stop() on exit for the lock to
remain locked while ending the init of the drivers.
[ benjamin.tissoires@redhat.com: imrpoved the changelog a lot ]
Signed-off-by: Jim Keir <jimkeir@oracledbadirect.com>
Reviewed-by: Benjamin.tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/usbhid/hid-pidff.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c index 10b616702780..0b531c6a76a5 100644 --- a/drivers/hid/usbhid/hid-pidff.c +++ b/drivers/hid/usbhid/hid-pidff.c @@ -1252,6 +1252,8 @@ int hid_pidff_init(struct hid_device *hid) pidff->hid = hid; + hid_device_io_start(hid); + pidff_find_reports(hid, HID_OUTPUT_REPORT, pidff); pidff_find_reports(hid, HID_FEATURE_REPORT, pidff); @@ -1315,9 +1317,13 @@ int hid_pidff_init(struct hid_device *hid) hid_info(dev, "Force feedback for USB HID PID devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); + hid_device_io_stop(hid); + return 0; fail: + hid_device_io_stop(hid); + kfree(pidff); return error; } |