media: pvrusb2: Convert timers to use timer_setup()

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.

Cc: Mike Isely <isely@pobox.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-By: Mike Isely <isely@pobox.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
index ad5b25b..8289ee4 100644 (file)
--- a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
@@ -330,10 +330,10 @@ static void pvr2_hdw_state_log_state(struct pvr2_hdw *);
 static int pvr2_hdw_cmd_usbstream(struct pvr2_hdw *hdw,int runFl);
 static int pvr2_hdw_commit_setup(struct pvr2_hdw *hdw);
 static int pvr2_hdw_get_eeprom_addr(struct pvr2_hdw *hdw);
-static void pvr2_hdw_quiescent_timeout(unsigned long);
-static void pvr2_hdw_decoder_stabilization_timeout(unsigned long);
-static void pvr2_hdw_encoder_wait_timeout(unsigned long);
-static void pvr2_hdw_encoder_run_timeout(unsigned long);
+static void pvr2_hdw_quiescent_timeout(struct timer_list *);
+static void pvr2_hdw_decoder_stabilization_timeout(struct timer_list *);
+static void pvr2_hdw_encoder_wait_timeout(struct timer_list *);
+static void pvr2_hdw_encoder_run_timeout(struct timer_list *);
 static int pvr2_issue_simple_cmd(struct pvr2_hdw *,u32);
 static int pvr2_send_request_ex(struct pvr2_hdw *hdw,
                                unsigned int timeout,int probe_fl,
@@ -2373,18 +2373,15 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
        }
        if (!hdw) goto fail;
 
-       setup_timer(&hdw->quiescent_timer, pvr2_hdw_quiescent_timeout,
-                   (unsigned long)hdw);
+       timer_setup(&hdw->quiescent_timer, pvr2_hdw_quiescent_timeout, 0);
 
-       setup_timer(&hdw->decoder_stabilization_timer,
-                   pvr2_hdw_decoder_stabilization_timeout,
-                   (unsigned long)hdw);
+       timer_setup(&hdw->decoder_stabilization_timer,
+                   pvr2_hdw_decoder_stabilization_timeout, 0);
 
-       setup_timer(&hdw->encoder_wait_timer, pvr2_hdw_encoder_wait_timeout,
-                   (unsigned long)hdw);
+       timer_setup(&hdw->encoder_wait_timer, pvr2_hdw_encoder_wait_timeout,
+                   0);
 
-       setup_timer(&hdw->encoder_run_timer, pvr2_hdw_encoder_run_timeout,
-                   (unsigned long)hdw);
+       timer_setup(&hdw->encoder_run_timer, pvr2_hdw_encoder_run_timeout, 0);
 
        hdw->master_state = PVR2_STATE_DEAD;
 
@@ -3539,10 +3536,16 @@ static void pvr2_ctl_read_complete(struct urb *urb)
        complete(&hdw->ctl_done);
 }
 
+struct hdw_timer {
+       struct timer_list timer;
+       struct pvr2_hdw *hdw;
+};
 
-static void pvr2_ctl_timeout(unsigned long data)
+static void pvr2_ctl_timeout(struct timer_list *t)
 {
-       struct pvr2_hdw *hdw = (struct pvr2_hdw *)data;
+       struct hdw_timer *timer = from_timer(timer, t, timer);
+       struct pvr2_hdw *hdw = timer->hdw;
+
        if (hdw->ctl_write_pend_flag || hdw->ctl_read_pend_flag) {
                hdw->ctl_timeout_flag = !0;
                if (hdw->ctl_write_pend_flag)
@@ -3564,7 +3567,10 @@ static int pvr2_send_request_ex(struct pvr2_hdw *hdw,
 {
        unsigned int idx;
        int status = 0;
-       struct timer_list timer;
+       struct hdw_timer timer = {
+               .hdw = hdw,
+       };
+
        if (!hdw->ctl_lock_held) {
                pvr2_trace(PVR2_TRACE_ERROR_LEGS,
                           "Attempted to execute control transfer without lock!!");
@@ -3621,8 +3627,8 @@ static int pvr2_send_request_ex(struct pvr2_hdw *hdw,
        hdw->ctl_timeout_flag = 0;
        hdw->ctl_write_pend_flag = 0;
        hdw->ctl_read_pend_flag = 0;
-       setup_timer(&timer, pvr2_ctl_timeout, (unsigned long)hdw);
-       timer.expires = jiffies + timeout;
+       timer_setup_on_stack(&timer.timer, pvr2_ctl_timeout, 0);
+       timer.timer.expires = jiffies + timeout;
 
        if (write_len && write_data) {
                hdw->cmd_debug_state = 2;
@@ -3677,7 +3683,7 @@ status);
        }
 
        /* Start timer */
-       add_timer(&timer);
+       add_timer(&timer.timer);
 
        /* Now wait for all I/O to complete */
        hdw->cmd_debug_state = 4;
@@ -3687,7 +3693,7 @@ status);
        hdw->cmd_debug_state = 5;
 
        /* Stop timer */
-       del_timer_sync(&timer);
+       del_timer_sync(&timer.timer);
 
        hdw->cmd_debug_state = 6;
        status = 0;
@@ -3769,6 +3775,8 @@ status);
        if ((status < 0) && (!probe_fl)) {
                pvr2_hdw_render_useless(hdw);
        }
+       destroy_timer_on_stack(&timer.timer);
+
        return status;
 }
 
@@ -4366,9 +4374,9 @@ static int state_eval_encoder_run(struct pvr2_hdw *hdw)
 
 
 /* Timeout function for quiescent timer. */
-static void pvr2_hdw_quiescent_timeout(unsigned long data)
+static void pvr2_hdw_quiescent_timeout(struct timer_list *t)
 {
-       struct pvr2_hdw *hdw = (struct pvr2_hdw *)data;
+       struct pvr2_hdw *hdw = from_timer(hdw, t, quiescent_timer);
        hdw->state_decoder_quiescent = !0;
        trace_stbit("state_decoder_quiescent",hdw->state_decoder_quiescent);
        hdw->state_stale = !0;
@@ -4377,9 +4385,9 @@ static void pvr2_hdw_quiescent_timeout(unsigned long data)
 
 
 /* Timeout function for decoder stabilization timer. */
-static void pvr2_hdw_decoder_stabilization_timeout(unsigned long data)
+static void pvr2_hdw_decoder_stabilization_timeout(struct timer_list *t)
 {
-       struct pvr2_hdw *hdw = (struct pvr2_hdw *)data;
+       struct pvr2_hdw *hdw = from_timer(hdw, t, decoder_stabilization_timer);
        hdw->state_decoder_ready = !0;
        trace_stbit("state_decoder_ready", hdw->state_decoder_ready);
        hdw->state_stale = !0;
@@ -4388,9 +4396,9 @@ static void pvr2_hdw_decoder_stabilization_timeout(unsigned long data)
 
 
 /* Timeout function for encoder wait timer. */
-static void pvr2_hdw_encoder_wait_timeout(unsigned long data)
+static void pvr2_hdw_encoder_wait_timeout(struct timer_list *t)
 {
-       struct pvr2_hdw *hdw = (struct pvr2_hdw *)data;
+       struct pvr2_hdw *hdw = from_timer(hdw, t, encoder_wait_timer);
        hdw->state_encoder_waitok = !0;
        trace_stbit("state_encoder_waitok",hdw->state_encoder_waitok);
        hdw->state_stale = !0;
@@ -4399,9 +4407,9 @@ static void pvr2_hdw_encoder_wait_timeout(unsigned long data)
 
 
 /* Timeout function for encoder run timer. */
-static void pvr2_hdw_encoder_run_timeout(unsigned long data)
+static void pvr2_hdw_encoder_run_timeout(struct timer_list *t)
 {
-       struct pvr2_hdw *hdw = (struct pvr2_hdw *)data;
+       struct pvr2_hdw *hdw = from_timer(hdw, t, encoder_run_timer);
        if (!hdw->state_encoder_runok) {
                hdw->state_encoder_runok = !0;
                trace_stbit("state_encoder_runok",hdw->state_encoder_runok);