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make sure we never oops because the hardware lock pointer in the sigdata

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structure is out of date
This commit is contained in:
Michel Daenzer 2002-09-21 23:18:54 +00:00
parent c4318a5c64
commit cfa1a918b6
6 changed files with 8 additions and 6 deletions
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1
linux-core/drm_bufs.c
View file

@ -137,6 +137,7 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
}
map->offset = (unsigned long)map->handle;
if ( map->flags & _DRM_CONTAINS_LOCK ) {
dev->sigdata.lock =
dev->lock.hw_lock = map->handle; /* Pointer to lock */
}
break;

4
linux-core/drm_drv.c
View file

@ -306,7 +306,7 @@ static int DRM(setup)( drm_device_t *dev )
dev->map_count = 0;
dev->vmalist = NULL;
dev->lock.hw_lock = NULL;
dev->sigdata.lock = dev->lock.hw_lock = NULL;
init_waitqueue_head( &dev->lock.lock_queue );
dev->queue_count = 0;
dev->queue_reserved = 0;
@ -491,7 +491,7 @@ static int DRM(takedown)( drm_device_t *dev )
DRM(dma_takedown)( dev );
#endif
if ( dev->lock.hw_lock ) {
dev->lock.hw_lock = NULL; /* SHM removed */
dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.pid = 0;
wake_up_interruptible( &dev->lock.lock_queue );
}

2
linux-core/drm_lock.c
View file

@ -237,7 +237,7 @@ int DRM(notifier)(void *priv)
/* Allow signal delivery if lock isn't held */
if (!_DRM_LOCK_IS_HELD(s->lock->lock)
if (!s->lock || !_DRM_LOCK_IS_HELD(s->lock->lock)
|| _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context) return 1;
/* Otherwise, set flag to force call to

1
linux/drm_bufs.h
View file

@ -137,6 +137,7 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
}
map->offset = (unsigned long)map->handle;
if ( map->flags & _DRM_CONTAINS_LOCK ) {
dev->sigdata.lock =
dev->lock.hw_lock = map->handle; /* Pointer to lock */
}
break;

4
linux/drm_drv.h
View file

@ -306,7 +306,7 @@ static int DRM(setup)( drm_device_t *dev )
dev->map_count = 0;
dev->vmalist = NULL;
dev->lock.hw_lock = NULL;
dev->sigdata.lock = dev->lock.hw_lock = NULL;
init_waitqueue_head( &dev->lock.lock_queue );
dev->queue_count = 0;
dev->queue_reserved = 0;
@ -491,7 +491,7 @@ static int DRM(takedown)( drm_device_t *dev )
DRM(dma_takedown)( dev );
#endif
if ( dev->lock.hw_lock ) {
dev->lock.hw_lock = NULL; /* SHM removed */
dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.pid = 0;
wake_up_interruptible( &dev->lock.lock_queue );
}

2
linux/drm_lock.h
View file

@ -237,7 +237,7 @@ int DRM(notifier)(void *priv)
/* Allow signal delivery if lock isn't held */
if (!_DRM_LOCK_IS_HELD(s->lock->lock)
if (!s->lock || !_DRM_LOCK_IS_HELD(s->lock->lock)
|| _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context) return 1;
/* Otherwise, set flag to force call to