Re: [PATCH] HID: usbhid: Convert timers to use timer_setup()

[Jiri Kosina]

On Wed, 4 Oct 2017, Kees Cook wrote:

> In preparation for unconditionally passing the struct timer_list pointer to
> all timer callbacks, switch to using the new timer_setup() and from_timer()
> to pass the timer pointer explicitly. Adds pointer back to hid_device for
> multitouch.

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH] HID: usbhid: Convert timers to use timer_setup()

[Benjamin Tissoires]

On Oct 04 2017 or thereabouts, Kees Cook wrote:
> In preparation for unconditionally passing the struct timer_list pointer to
> all timer callbacks, switch to using the new timer_setup() and from_timer()
> to pass the timer pointer explicitly. Adds pointer back to hid_device for
> multitouch.
> 
> Cc: Jiri Kosina 
> Cc: Benjamin Tissoires 
> Cc: linux-in...@vger.kernel.org
> Cc: linux-usb@vger.kernel.org
> Cc: Thomas Gleixner 
> Signed-off-by: Kees Cook 
> ---
> This requires commit 686fef928bba ("timer: Prepare to change timer
> callback argument type") in v4.14-rc3, but should be otherwise
> stand-alone.

Looks good to me:
Reviewed-by: Benjamin Tissoires 

Selfish request: Jiri can you add the dependency about 686fef928bba in
the commit message too? I am just preparing in case I need to backport
this in RHEL, and having the dep explicitly mentioned would save me a
little bit of extra time :)
(if not, no worries)

Cheers,
Benjamin

> ---
>  drivers/hid/hid-multitouch.c  | 10 ++
>  drivers/hid/usbhid/hid-core.c |  8 
>  2 files changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 440b999304a5..b0e3e2614b18 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -112,6 +112,7 @@ struct mt_device {
>   struct mt_slot curdata; /* placeholder of incoming data */
>   struct mt_class mtclass;/* our mt device class */
>   struct timer_list release_timer;/* to release sticky fingers */
> + struct hid_device *hdev;/* hid_device we're attached to */
>   struct mt_fields *fields;   /* temporary placeholder for storing the
>  multitouch fields */
>   unsigned long mt_io_flags;  /* mt flags (MT_IO_FLAGS_*) */
> @@ -1245,10 +1246,10 @@ static void mt_release_contacts(struct hid_device 
> *hid)
>   td->num_received = 0;
>  }
>  
> -static void mt_expired_timeout(unsigned long arg)
> +static void mt_expired_timeout(struct timer_list *t)
>  {
> - struct hid_device *hdev = (void *)arg;
> - struct mt_device *td = hid_get_drvdata(hdev);
> + struct mt_device *td = from_timer(td, t, release_timer);
> + struct hid_device *hdev = td->hdev;
>  
>   /*
>* An input report came in just before we release the sticky fingers,
> @@ -1279,6 +1280,7 @@ static int mt_probe(struct hid_device *hdev, const 
> struct hid_device_id *id)
>   dev_err(>dev, "cannot allocate multitouch data\n");
>   return -ENOMEM;
>   }
> + td->hdev = hdev;
>   td->mtclass = *mtclass;
>   td->inputmode = -1;
>   td->maxcontact_report_id = -1;
> @@ -1330,7 +1332,7 @@ static int mt_probe(struct hid_device *hdev, const 
> struct hid_device_id *id)
>*/
>   hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
>  
> - setup_timer(>release_timer, mt_expired_timeout, (long)hdev);
> + timer_setup(>release_timer, mt_expired_timeout, 0);
>  
>   ret = hid_parse(hdev);
>   if (ret != 0)
> diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
> index 089bad8a9a21..9f9fe0e58f5b 100644
> --- a/drivers/hid/usbhid/hid-core.c
> +++ b/drivers/hid/usbhid/hid-core.c
> @@ -101,10 +101,10 @@ static int hid_start_in(struct hid_device *hid)
>  }
>  
>  /* I/O retry timer routine */
> -static void hid_retry_timeout(unsigned long _hid)
> +static void hid_retry_timeout(struct timer_list *t)
>  {
> - struct hid_device *hid = (struct hid_device *) _hid;
> - struct usbhid_device *usbhid = hid->driver_data;
> + struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry);
> + struct hid_device *hid = usbhid->hid;
>  
>   dev_dbg(>intf->dev, "retrying intr urb\n");
>   if (hid_start_in(hid))
> @@ -1363,7 +1363,7 @@ static int usbhid_probe(struct usb_interface *intf, 
> const struct usb_device_id *
>  
>   init_waitqueue_head(>wait);
>   INIT_WORK(>reset_work, hid_reset);
> - setup_timer(>io_retry, hid_retry_timeout, (unsigned long) hid);
> + timer_setup(>io_retry, hid_retry_timeout, 0);
>   spin_lock_init(>lock);
>  
>   ret = hid_add_device(hid);
> -- 
> 2.7.4
> 
> 
> -- 
> Kees Cook
> Pixel Security
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[PATCH] HID: usbhid: Convert timers to use timer_setup()

[Kees Cook]

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Adds pointer back to hid_device for
multitouch.

Cc: Jiri Kosina 
Cc: Benjamin Tissoires 
Cc: linux-in...@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: Thomas Gleixner 
Signed-off-by: Kees Cook 
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
 drivers/hid/hid-multitouch.c  | 10 ++
 drivers/hid/usbhid/hid-core.c |  8 
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 440b999304a5..b0e3e2614b18 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -112,6 +112,7 @@ struct mt_device {
struct mt_slot curdata; /* placeholder of incoming data */
struct mt_class mtclass;/* our mt device class */
struct timer_list release_timer;/* to release sticky fingers */
+   struct hid_device *hdev;/* hid_device we're attached to */
struct mt_fields *fields;   /* temporary placeholder for storing the
   multitouch fields */
unsigned long mt_io_flags;  /* mt flags (MT_IO_FLAGS_*) */
@@ -1245,10 +1246,10 @@ static void mt_release_contacts(struct hid_device *hid)
td->num_received = 0;
 }
 
-static void mt_expired_timeout(unsigned long arg)
+static void mt_expired_timeout(struct timer_list *t)
 {
-   struct hid_device *hdev = (void *)arg;
-   struct mt_device *td = hid_get_drvdata(hdev);
+   struct mt_device *td = from_timer(td, t, release_timer);
+   struct hid_device *hdev = td->hdev;
 
/*
 * An input report came in just before we release the sticky fingers,
@@ -1279,6 +1280,7 @@ static int mt_probe(struct hid_device *hdev, const struct 
hid_device_id *id)
dev_err(>dev, "cannot allocate multitouch data\n");
return -ENOMEM;
}
+   td->hdev = hdev;
td->mtclass = *mtclass;
td->inputmode = -1;
td->maxcontact_report_id = -1;
@@ -1330,7 +1332,7 @@ static int mt_probe(struct hid_device *hdev, const struct 
hid_device_id *id)
 */
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 
-   setup_timer(>release_timer, mt_expired_timeout, (long)hdev);
+   timer_setup(>release_timer, mt_expired_timeout, 0);
 
ret = hid_parse(hdev);
if (ret != 0)
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 089bad8a9a21..9f9fe0e58f5b 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -101,10 +101,10 @@ static int hid_start_in(struct hid_device *hid)
 }
 
 /* I/O retry timer routine */
-static void hid_retry_timeout(unsigned long _hid)
+static void hid_retry_timeout(struct timer_list *t)
 {
-   struct hid_device *hid = (struct hid_device *) _hid;
-   struct usbhid_device *usbhid = hid->driver_data;
+   struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry);
+   struct hid_device *hid = usbhid->hid;
 
dev_dbg(>intf->dev, "retrying intr urb\n");
if (hid_start_in(hid))
@@ -1363,7 +1363,7 @@ static int usbhid_probe(struct usb_interface *intf, const 
struct usb_device_id *
 
init_waitqueue_head(>wait);
INIT_WORK(>reset_work, hid_reset);
-   setup_timer(>io_retry, hid_retry_timeout, (unsigned long) hid);
+   timer_setup(>io_retry, hid_retry_timeout, 0);
spin_lock_init(>lock);
 
ret = hid_add_device(hid);
-- 
2.7.4


-- 
Kees Cook
Pixel Security
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html