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staging: comedi: don't disable IRQ for comedi_file_info_table_lock

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None of the functions that acquire the comedi_file_info_table_lock
spin-lock need to disable interrupts.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2012-03-30 17:14:57 +01:00 committed by Greg Kroah-Hartman
parent 4c093a6dc2
commit 7cbd8f3dca
1 changed files with 10 additions and 15 deletions
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25
drivers/staging/comedi/comedi_fops.c
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@ -2192,7 +2192,6 @@ static void comedi_device_cleanup(struct comedi_device *dev)
int comedi_alloc_board_minor(struct device *hardware_device)
{
unsigned long flags;
struct comedi_device_file_info *info;
struct device *csdev;
unsigned i;
@ -2207,14 +2206,14 @@ int comedi_alloc_board_minor(struct device *hardware_device)
return -ENOMEM;
}
comedi_device_init(info->device);
spin_lock_irqsave(&comedi_file_info_table_lock, flags);
spin_lock(&comedi_file_info_table_lock);
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; ++i) {
if (comedi_file_info_table[i] == NULL) {
comedi_file_info_table[i] = info;
break;
}
}
spin_unlock_irqrestore(&comedi_file_info_table_lock, flags);
spin_unlock(&comedi_file_info_table_lock);
if (i == COMEDI_NUM_BOARD_MINORS) {
comedi_device_cleanup(info->device);
kfree(info->device);
@ -2271,14 +2270,13 @@ int comedi_alloc_board_minor(struct device *hardware_device)
void comedi_free_board_minor(unsigned minor)
{
unsigned long flags;
struct comedi_device_file_info *info;
BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS);
spin_lock_irqsave(&comedi_file_info_table_lock, flags);
spin_lock(&comedi_file_info_table_lock);
info = comedi_file_info_table[minor];
comedi_file_info_table[minor] = NULL;
spin_unlock_irqrestore(&comedi_file_info_table_lock, flags);
spin_unlock(&comedi_file_info_table_lock);
if (info) {
struct comedi_device *dev = info->device;
@ -2297,7 +2295,6 @@ void comedi_free_board_minor(unsigned minor)
int comedi_alloc_subdevice_minor(struct comedi_device *dev,
struct comedi_subdevice *s)
{
unsigned long flags;
struct comedi_device_file_info *info;
struct device *csdev;
unsigned i;
@ -2309,14 +2306,14 @@ int comedi_alloc_subdevice_minor(struct comedi_device *dev,
info->device = dev;
info->read_subdevice = s;
info->write_subdevice = s;
spin_lock_irqsave(&comedi_file_info_table_lock, flags);
spin_lock(&comedi_file_info_table_lock);
for (i = COMEDI_FIRST_SUBDEVICE_MINOR; i < COMEDI_NUM_MINORS; ++i) {
if (comedi_file_info_table[i] == NULL) {
comedi_file_info_table[i] = info;
break;
}
}
spin_unlock_irqrestore(&comedi_file_info_table_lock, flags);
spin_unlock(&comedi_file_info_table_lock);
if (i == COMEDI_NUM_MINORS) {
kfree(info);
printk(KERN_ERR
@ -2372,7 +2369,6 @@ int comedi_alloc_subdevice_minor(struct comedi_device *dev,
void comedi_free_subdevice_minor(struct comedi_subdevice *s)
{
unsigned long flags;
struct comedi_device_file_info *info;
if (s == NULL)
@ -2383,10 +2379,10 @@ void comedi_free_subdevice_minor(struct comedi_subdevice *s)
BUG_ON(s->minor >= COMEDI_NUM_MINORS);
BUG_ON(s->minor < COMEDI_FIRST_SUBDEVICE_MINOR);
spin_lock_irqsave(&comedi_file_info_table_lock, flags);
spin_lock(&comedi_file_info_table_lock);
info = comedi_file_info_table[s->minor];
comedi_file_info_table[s->minor] = NULL;
spin_unlock_irqrestore(&comedi_file_info_table_lock, flags);
spin_unlock(&comedi_file_info_table_lock);
if (s->class_dev) {
device_destroy(comedi_class, MKDEV(COMEDI_MAJOR, s->minor));
@ -2397,13 +2393,12 @@ void comedi_free_subdevice_minor(struct comedi_subdevice *s)
struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor)
{
unsigned long flags;
struct comedi_device_file_info *info;
BUG_ON(minor >= COMEDI_NUM_MINORS);
spin_lock_irqsave(&comedi_file_info_table_lock, flags);
spin_lock(&comedi_file_info_table_lock);
info = comedi_file_info_table[minor];
spin_unlock_irqrestore(&comedi_file_info_table_lock, flags);
spin_unlock(&comedi_file_info_table_lock);
return info;
}
EXPORT_SYMBOL_GPL(comedi_get_device_file_info);