From: David Herrmann <dh.herrmann@gmail.com>
To: linux-input@vger.kernel.org
Cc: Jiri Kosina <jkosina@suse.cz>, David Herrmann <dh.herrmann@gmail.com>
Subject: [PATCH 19/21] HID: wiimote: lock DRM mode during debugfs overwrite
Date: Sat, 13 Apr 2013 12:48:00 +0200 [thread overview]
Message-ID: <1365850082-3585-20-git-send-email-dh.herrmann@gmail.com> (raw)
In-Reply-To: <1365850082-3585-1-git-send-email-dh.herrmann@gmail.com>
If we write a DRM mode via debugfs, we shouldn't allow normal operations
to overwrite this DRM mode. This is important if we want to debug
3rd-party devices and we want to see what data is sent on each mode.
If we write NULL/0 as DRM, the lock is removed again so the best matching
DRM is chosen by wiimote core.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
---
drivers/hid/hid-wiimote-core.c | 4 +++-
drivers/hid/hid-wiimote-debug.c | 3 +++
drivers/hid/hid-wiimote.h | 1 +
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index 6f930f1..126c9d9 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -234,7 +234,9 @@ void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
{
__u8 cmd[3];
- if (drm == WIIPROTO_REQ_NULL)
+ if (wdata->state.flags & WIIPROTO_FLAG_DRM_LOCKED)
+ drm = wdata->state.drm;
+ else if (drm == WIIPROTO_REQ_NULL)
drm = select_drm(wdata);
cmd[0] = WIIPROTO_REQ_DRM;
diff --git a/drivers/hid/hid-wiimote-debug.c b/drivers/hid/hid-wiimote-debug.c
index 0c0deaa..6e76a2c 100644
--- a/drivers/hid/hid-wiimote-debug.c
+++ b/drivers/hid/hid-wiimote-debug.c
@@ -154,7 +154,10 @@ static ssize_t wiidebug_drm_write(struct file *f, const char __user *u,
i = simple_strtoul(buf, NULL, 10);
spin_lock_irqsave(&dbg->wdata->state.lock, flags);
+ dbg->wdata->state.flags &= ~WIIPROTO_FLAG_DRM_LOCKED;
wiiproto_req_drm(dbg->wdata, (__u8) i);
+ if (i != WIIPROTO_REQ_NULL)
+ dbg->wdata->state.flags |= WIIPROTO_FLAG_DRM_LOCKED;
spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
return len;
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 46457f6..6700853 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -43,6 +43,7 @@
#define WIIPROTO_FLAG_MP_USED 0x1000
#define WIIPROTO_FLAG_MP_ACTIVE 0x2000
#define WIIPROTO_FLAG_EXITING 0x4000
+#define WIIPROTO_FLAG_DRM_LOCKED 0x8000
#define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
--
1.8.2.1
next prev parent reply other threads:[~2013-04-13 10:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-13 10:47 [RFC 00/21] Nintendo Wii Remote Extension Hotplugging David Herrmann
2013-04-13 10:47 ` [PATCH 01/21] HID: wiimote: extend driver description David Herrmann
2013-04-13 10:47 ` [PATCH 02/21] HID: wiimote: move queue handling into separate struct David Herrmann
2013-04-13 10:47 ` [PATCH 03/21] HID: wiimote: keep HID device open David Herrmann
2013-04-13 10:47 ` [PATCH 04/21] HID: wiimote: add device detection David Herrmann
2013-04-13 10:47 ` [PATCH 05/21] HID: wiimote: use cached battery values on I/O failure David Herrmann
2013-04-13 10:47 ` [PATCH 06/21] HID: wiimote: wake up if output queue failed David Herrmann
2013-04-13 10:47 ` [PATCH 07/21] HID: wiimote: add sub-device module infrastructure David Herrmann
2013-04-13 10:47 ` [PATCH 08/21] HID: wiimote: convert KEYS and RUMBLE to modules David Herrmann
2013-04-13 10:47 ` [PATCH 09/21] HID: wiimote: convert BATTERY to module David Herrmann
2013-04-13 10:47 ` [PATCH 10/21] HID: wiimote: convert LEDS to modules David Herrmann
2013-04-13 10:47 ` [PATCH 11/21] HID: wiimote: convert ACCEL to module David Herrmann
2013-04-13 10:47 ` [PATCH 12/21] HID: wiimote: convert IR " David Herrmann
2013-04-13 10:47 ` [PATCH 13/21] HID: wiimote: add extension hotplug support David Herrmann
2013-04-13 10:47 ` [PATCH 14/21] HID: wiimote: add Balance Board support David Herrmann
2013-04-13 10:47 ` [PATCH 15/21] HID: wiimote: add Nunchuk support David Herrmann
2013-04-13 10:47 ` [PATCH 16/21] HID: wiimote: add Classic Controller extension David Herrmann
2013-04-13 10:47 ` [PATCH 17/21] HID: wiimote: add Motion Plus extension module David Herrmann
2013-04-13 10:47 ` [PATCH 18/21] HID: wiimote: fix ctx pointer in debugfs DRM-write David Herrmann
2013-04-13 10:48 ` David Herrmann [this message]
2013-04-13 10:48 ` [PATCH 20/21] HID: wiimote: add sysfs extension/device-type attrs David Herrmann
2013-04-13 10:48 ` [PATCH 21/21] HID: wiimote: add "bboard_calib" attribute David Herrmann
2013-04-19 19:38 ` [RFC 00/21] Nintendo Wii Remote Extension Hotplugging Jiri Kosina
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