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Char: rocket, switch sleep_on to completion 

rocket, switch sleep_on to completion

- sleep_on is deprecated and racy, use completion instead
- also check retval of interruptible function and return ERESTARTSYS
  eventually

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Jiri Slaby 2007-10-18 03:06:25 -07:00 committed by Linus Torvalds
parent 95e0791480
commit 8cf5a8c572
2 changed files with 9 additions and 10 deletions
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12
drivers/char/rocket.c
View File

@ -84,6 +84,7 @@
#include <linux/mutex.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/wait.h>
#include <linux/pci.h>
#include <asm/uaccess.h>
@ -650,7 +651,7 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
info->closing_wait = 3000;
info->close_delay = 50;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
init_completion(&info->close_wait);
info->flags &= ~ROCKET_MODE_MASK;
switch (pc104[board][line]) {
case 422:
@ -878,7 +879,8 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
if (tty_hung_up_p(filp))
return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
if (info->flags & ROCKET_CLOSING) {
interruptible_sleep_on(&info->close_wait);
if (wait_for_completion_interruptible(&info->close_wait))
return -ERESTARTSYS;
return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
}
@ -983,8 +985,10 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
return -ENOMEM;
if (info->flags & ROCKET_CLOSING) {
interruptible_sleep_on(&info->close_wait);
retval = wait_for_completion_interruptible(&info->close_wait);
free_page(page);
if (retval)
return retval;
return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
}
@ -1176,7 +1180,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
}
info->flags &= ~(ROCKET_INITIALIZED | ROCKET_CLOSING | ROCKET_NORMAL_ACTIVE);
tty->closing = 0;
wake_up_interruptible(&info->close_wait);
complete_all(&info->close_wait);
atomic_dec(&rp_num_ports_open);
#ifdef ROCKET_DEBUG_OPEN

7
drivers/char/rocket_int.h
View File

@ -1163,13 +1163,8 @@ struct r_port {
int read_status_mask;
int cps;
#ifdef DECLARE_WAITQUEUE
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
#else
struct wait_queue *open_wait;
struct wait_queue *close_wait;
#endif
struct completion close_wait;
spinlock_t slock;
struct mutex write_mtx;
};