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authorJim Keir <jimkeir@oracledbadirect.com>2015-01-23 17:21:12 +0000
committerJiri Kosina <jkosina@suse.cz>2015-01-26 21:26:30 +0100
commitafd700d933963d07391e3e3dfbfbc05e905960ef (patch)
tree063934f6d0e4467c70a50da8766b4868a429926a /drivers/hid/usbhid
parent3458e4c0e5f8783ae699e1205062d1fdd2a48cca (diff)
downloadlinux-afd700d933963d07391e3e3dfbfbc05e905960ef.tar.bz2
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>
Diffstat (limited to 'drivers/hid/usbhid')
-rw-r--r--drivers/hid/usbhid/hid-pidff.c6
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;
}