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Revert "tty: n_gsm: replace kicktimer with delayed_work"

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This reverts commit c9ab053e56.

The above commit is reverted as it was a prerequisite for tx_mutex
introduction and tx_mutex has been removed as it does not correctly
work in order to protect tx data.

Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20221008110221.13645-3-pchelkin@ispras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fedor Pchelkin 2022-10-08 14:02:21 +03:00 committed by Greg Kroah-Hartman
parent acdab4cb4b
commit 15743ae50e
1 changed files with 8 additions and 8 deletions
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16
drivers/tty/n_gsm.c
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@ -272,7 +272,7 @@ struct gsm_mux {
struct list_head tx_data_list; /* Pending data packets */
/* Control messages */
struct delayed_work kick_timeout; /* Kick TX queuing on timeout */
struct timer_list kick_timer; /* Kick TX queuing on timeout */
struct timer_list t2_timer; /* Retransmit timer for commands */
int cretries; /* Command retry counter */
struct gsm_control *pending_cmd;/* Our current pending command */
@ -1029,7 +1029,7 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg)
gsm->tx_bytes += msg->len;
gsmld_write_trigger(gsm);
schedule_delayed_work(&gsm->kick_timeout, 10 * gsm->t1 * HZ / 100);
mod_timer(&gsm->kick_timer, jiffies + 10 * gsm->t1 * HZ / 100);
}
/**
@ -2022,16 +2022,16 @@ static void gsm_dlci_command(struct gsm_dlci *dlci, const u8 *data, int len)
}
/**
* gsm_kick_timeout - transmit if possible
* @work: work contained in our gsm object
* gsm_kick_timer - transmit if possible
* @t: timer contained in our gsm object
*
* Transmit data from DLCIs if the queue is empty. We can't rely on
* a tty wakeup except when we filled the pipe so we need to fire off
* new data ourselves in other cases.
*/
static void gsm_kick_timeout(struct work_struct *work)
static void gsm_kick_timer(struct timer_list *t)
{
struct gsm_mux *gsm = container_of(work, struct gsm_mux, kick_timeout.work);
struct gsm_mux *gsm = from_timer(gsm, t, kick_timer);
unsigned long flags;
int sent = 0;
@ -2496,7 +2496,7 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc)
}
/* Finish outstanding timers, making sure they are done */
cancel_delayed_work_sync(&gsm->kick_timeout);
del_timer_sync(&gsm->kick_timer);
del_timer_sync(&gsm->t2_timer);
/* Finish writing to ldisc */
@ -2643,7 +2643,7 @@ static struct gsm_mux *gsm_alloc_mux(void)
kref_init(&gsm->ref);
INIT_LIST_HEAD(&gsm->tx_ctrl_list);
INIT_LIST_HEAD(&gsm->tx_data_list);
INIT_DELAYED_WORK(&gsm->kick_timeout, gsm_kick_timeout);
timer_setup(&gsm->kick_timer, gsm_kick_timer, 0);
timer_setup(&gsm->t2_timer, gsm_control_retransmit, 0);
INIT_WORK(&gsm->tx_work, gsmld_write_task);
init_waitqueue_head(&gsm->event);