From: Jim Keir Date: Thu, 26 Feb 2015 09:14:03 +0000 (+0000) Subject: HID: pidff: support more than one concurrent effect X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e8f46e4f93f52b2bcc681cf8bc3ff84a22a2d356;p=linux-beck.git HID: pidff: support more than one concurrent effect The PID driver (usbhid/hid-pidff.c) does not set the effect ID when uploading an effect. The result is that the initial upload works but subsequent uploads to modify effect parameters are all directed at the last-created effect. The targeted effect ID must be passed back to the device when effect parameters are changed. This is done at the start of "pidff_set_condition_report", "pidff_set_periodic_report" etc. based on the value of "pidff->block_load[PID_EFFECT_ BLOCK_INDEX].value[0]". This value is only ever set during pidff_request_effect_upload. The result is stored in "pidff->pid_id[effect->id]" at the end of pid_upload_effect, for later use. However, if an effect is modified and re-sent then this identifier is not being copied back from pidff->pid_id[effect->id] before sending the command to the device. The fix is to do this at the start of pidff_upload_effect. Signed-off-by: Jim Keir Signed-off-by: Jiri Kosina --- diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c index 0b531c6a76a5..1b3fa70bd5ff 100644 --- a/drivers/hid/usbhid/hid-pidff.c +++ b/drivers/hid/usbhid/hid-pidff.c @@ -568,6 +568,12 @@ static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect, int type_id; int error; + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0; + if (old && effect) { + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->pid_id[effect->id]; + } + switch (effect->type) { case FF_CONSTANT: if (!old) {