diff options
Diffstat (limited to 'drivers/char/snsc.c')
| -rw-r--r-- | drivers/char/snsc.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/char/snsc.c b/drivers/char/snsc.c index b9c1dba6bd0..8bab59292a0 100644 --- a/drivers/char/snsc.c +++ b/drivers/char/snsc.c @@ -21,6 +21,7 @@ #include <linux/poll.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/mutex.h> #include <asm/sn/io.h> #include <asm/sn/sn_sal.h> #include <asm/sn/module.h> @@ -33,6 +34,7 @@ #define SCDRV_BUFSZ 2048 #define SCDRV_TIMEOUT 1000 +static DEFINE_MUTEX(scdrv_mutex); static irqreturn_t scdrv_interrupt(int irq, void *subch_data) { @@ -80,7 +82,7 @@ scdrv_open(struct inode *inode, struct file *file) sd = kzalloc(sizeof (struct subch_data_s), GFP_KERNEL); if (sd == NULL) { printk("%s: couldn't allocate subchannel data\n", - __FUNCTION__); + __func__); return -ENOMEM; } @@ -90,7 +92,7 @@ scdrv_open(struct inode *inode, struct file *file) if (sd->sd_subch < 0) { kfree(sd); - printk("%s: couldn't allocate subchannel\n", __FUNCTION__); + printk("%s: couldn't allocate subchannel\n", __func__); return -EBUSY; } @@ -104,16 +106,17 @@ scdrv_open(struct inode *inode, struct file *file) file->private_data = sd; /* hook this subchannel up to the system controller interrupt */ + mutex_lock(&scdrv_mutex); rv = request_irq(SGI_UART_VECTOR, scdrv_interrupt, - IRQF_SHARED | IRQF_DISABLED, - SYSCTL_BASENAME, sd); + IRQF_SHARED, SYSCTL_BASENAME, sd); if (rv) { ia64_sn_irtr_close(sd->sd_nasid, sd->sd_subch); kfree(sd); - printk("%s: irq request failed (%d)\n", __FUNCTION__, rv); + printk("%s: irq request failed (%d)\n", __func__, rv); + mutex_unlock(&scdrv_mutex); return -EBUSY; } - + mutex_unlock(&scdrv_mutex); return 0; } @@ -215,7 +218,7 @@ scdrv_read(struct file *file, char __user *buf, size_t count, loff_t *f_pos) */ if (count < len) { pr_debug("%s: only accepting %d of %d bytes\n", - __FUNCTION__, (int) count, len); + __func__, (int) count, len); } len = min((int) count, len); if (copy_to_user(buf, sd->sd_rb, len)) @@ -354,6 +357,7 @@ static const struct file_operations scdrv_fops = { .poll = scdrv_poll, .open = scdrv_open, .release = scdrv_release, + .llseek = noop_llseek, }; static struct class *snsc_class; @@ -384,7 +388,7 @@ scdrv_init(void) if (alloc_chrdev_region(&first_dev, 0, num_cnodes, SYSCTL_BASENAME) < 0) { printk("%s: failed to register SN system controller device\n", - __FUNCTION__); + __func__); return -ENODEV; } snsc_class = class_create(THIS_MODULE, SYSCTL_BASENAME); @@ -403,7 +407,7 @@ scdrv_init(void) GFP_KERNEL); if (!scd) { printk("%s: failed to allocate device info" - "for %s/%s\n", __FUNCTION__, + "for %s/%s\n", __func__, SYSCTL_BASENAME, devname); continue; } @@ -412,7 +416,7 @@ scdrv_init(void) scd->scd_nasid = cnodeid_to_nasid(cnode); if (!(salbuf = kmalloc(SCDRV_BUFSZ, GFP_KERNEL))) { printk("%s: failed to allocate driver buffer" - "(%s%s)\n", __FUNCTION__, + "(%s%s)\n", __func__, SYSCTL_BASENAME, devname); kfree(scd); continue; @@ -424,7 +428,7 @@ scdrv_init(void) ("%s: failed to initialize SAL for" " system controller communication" " (%s/%s): outdated PROM?\n", - __FUNCTION__, SYSCTL_BASENAME, devname); + __func__, SYSCTL_BASENAME, devname); kfree(scd); kfree(salbuf); continue; @@ -435,13 +439,14 @@ scdrv_init(void) if (cdev_add(&scd->scd_cdev, dev, 1)) { printk("%s: failed to register system" " controller device (%s%s)\n", - __FUNCTION__, SYSCTL_BASENAME, devname); + __func__, SYSCTL_BASENAME, devname); kfree(scd); kfree(salbuf); continue; } - device_create(snsc_class, NULL, dev, "%s", devname); + device_create(snsc_class, NULL, dev, NULL, + "%s", devname); ia64_sn_irtr_intr_enable(scd->scd_nasid, 0 /*ignored */ , |