[PATCH] tty: cyclades: 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. Moves timer structures
from global to attached to struct cyclades_port.

Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Jiri Slaby <jsl...@suse.com>
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
 drivers/tty/cyclades.c   | 16 ++++++----------
 include/linux/cyclades.h |  3 +++
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index d272bc4e7fb5..f30f7a90995c 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -286,8 +286,7 @@ static long cyz_polling_cycle = CZ_DEF_POLL;
 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 
 #else                          /* CONFIG_CYZ_INTR */
-static void cyz_rx_restart(unsigned long);
-static struct timer_list cyz_rx_full_timer[NR_PORTS];
+static void cyz_rx_restart(struct timer_list *);
 #endif                         /* CONFIG_CYZ_INTR */
 
 static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
@@ -992,10 +991,8 @@ static void cyz_handle_rx(struct cyclades_port *info)
        else
                char_count = rx_put - rx_get + rx_bufsize;
        if (char_count >= readl(&buf_ctrl->rx_threshold) &&
-                       !timer_pending(&cyz_rx_full_timer[
-                                       info->line]))
-               mod_timer(&cyz_rx_full_timer[info->line],
-                               jiffies + 1);
+                       !timer_pending(&info->rx_full_timer))
+               mod_timer(&info->rx_full_timer, jiffies + 1);
 #endif
        info->idle_stats.recv_idle = jiffies;
        tty_schedule_flip(&info->port);
@@ -1197,9 +1194,9 @@ static irqreturn_t cyz_interrupt(int irq, void *dev_id)
        return IRQ_HANDLED;
 }                              /* cyz_interrupt */
 
-static void cyz_rx_restart(unsigned long arg)
+static void cyz_rx_restart(struct timer_list *t)
 {
-       struct cyclades_port *info = (struct cyclades_port *)arg;
+       struct cyclades_port *info = from_timer(info, t, rx_full_timer);
        struct cyclades_card *card = info->card;
        int retval;
        __u32 channel = info->line - card->first_line;
@@ -3097,8 +3094,7 @@ static int cy_init_card(struct cyclades_card *cinfo)
                        else
                                info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
 #ifdef CONFIG_CYZ_INTR
-                       setup_timer(&cyz_rx_full_timer[port],
-                               cyz_rx_restart, (unsigned long)info);
+                       timer_setup(&info->rx_full_timer, cyz_rx_restart, 0);
 #endif
                } else {
                        unsigned short chip_number;
diff --git a/include/linux/cyclades.h b/include/linux/cyclades.h
index 19ae518f5471..3638eb2d52f6 100644
--- a/include/linux/cyclades.h
+++ b/include/linux/cyclades.h
@@ -156,6 +156,9 @@ struct cyclades_port {
        struct cyclades_icount  icount;
        struct completion       shutdown_wait;
        int throttle;
+#ifdef CONFIG_CYZ_INTR
+       struct timer_list       rx_full_timer;
+#endif
 };
 
 #define        CLOSING_WAIT_DELAY      30*HZ
-- 
2.7.4


-- 
Kees Cook
Pixel Security