#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
+#include <linux/mutex.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <asm/atomic.h>
#include <linux/bitops.h>
#include <linux/spinlock.h>
-#include <asm/semaphore.h>
#include <linux/init.h>
/****** RocketPort includes ******/
ctlp = sCtlNumToCtlPtr(board);
/* Get a r_port struct for the port, fill it in and save it globally, indexed by line number */
- info = kmalloc(sizeof (struct r_port), GFP_KERNEL);
+ info = kzalloc(sizeof (struct r_port), GFP_KERNEL);
if (!info) {
printk(KERN_INFO "Couldn't allocate info struct for line #%d\n", line);
return;
}
- memset(info, 0, sizeof (struct r_port));
info->magic = RPORT_MAGIC;
info->line = line;
}
}
spin_lock_init(&info->slock);
- sema_init(&info->write_sem, 1);
+ mutex_init(&info->write_mtx);
rp_table[line] = info;
if (pci_dev)
tty_register_device(rocket_driver, line, &pci_dev->dev);
#endif
schedule(); /* Don't hold spinlock here, will hang PC */
}
- current->state = TASK_RUNNING;
+ __set_current_state(TASK_RUNNING);
remove_wait_queue(&info->open_wait, &wait);
spin_lock_irqsave(&info->slock, flags);
/*
* Info->count is now 1; so it's safe to sleep now.
*/
- info->session = process_session(current);
- info->pgrp = process_group(current);
-
if ((info->flags & ROCKET_INITIALIZED) == 0) {
cp = &info->channel;
sSetRxTrigger(cp, TRIG_1);
if (signal_pending(current))
break;
}
- current->state = TASK_RUNNING;
+ __set_current_state(TASK_RUNNING);
#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
printk(KERN_INFO "txcnt = %d (jiff=%lu)...done\n", txcnt, jiffies);
#endif
if (rocket_paranoia_check(info, "rp_put_char"))
return;
- /* Grab the port write semaphore, locking out other processes that try to write to this port */
- down(&info->write_sem);
+ /*
+ * Grab the port write mutex, locking out other processes that try to
+ * write to this port
+ */
+ mutex_lock(&info->write_mtx);
#ifdef ROCKET_DEBUG_WRITE
printk(KERN_INFO "rp_put_char %c...", ch);
info->xmit_fifo_room--;
}
spin_unlock_irqrestore(&info->slock, flags);
- up(&info->write_sem);
+ mutex_unlock(&info->write_mtx);
}
/*
* Exception handler - write routine, called when user app writes to the device.
- * A per port write semaphore is used to protect from another process writing to
+ * A per port write mutex is used to protect from another process writing to
* this port at the same time. This other process could be running on the other CPU
* or get control of the CPU if the copy_from_user() blocks due to a page fault (swapped out).
* Spinlocks protect the info xmit members.
if (count <= 0 || rocket_paranoia_check(info, "rp_write"))
return 0;
- down_interruptible(&info->write_sem);
+ if (mutex_lock_interruptible(&info->write_mtx))
+ return -ERESTARTSYS;
#ifdef ROCKET_DEBUG_WRITE
printk(KERN_INFO "rp_write %d chars...", count);
wake_up_interruptible(&tty->poll_wait);
#endif
}
- up(&info->write_sem);
+ mutex_unlock(&info->write_mtx);
return retval;
}