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authorMichel Daenzer <michel@daenzer.net>2002-09-21 23:18:54 +0000
committerMichel Daenzer <michel@daenzer.net>2002-09-21 23:18:54 +0000
commitcfa1a918b6d6b2d0fd9ae0f58f5b86a15c443dcb (patch)
tree0b0c8cf97cc6323ed332c3595ce6741cae14d704 /linux-core
parentc4318a5c642d15ad3847a0b7a3185abf0c1ca219 (diff)
make sure we never oops because the hardware lock pointer in the sigdata
structure is out of date
Diffstat (limited to 'linux-core')
-rw-r--r--linux-core/drm_bufs.c1
-rw-r--r--linux-core/drm_drv.c4
-rw-r--r--linux-core/drm_lock.c2
3 files changed, 4 insertions, 3 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index 3ff3527f..9ce7cfff 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -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;
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 81bd7894..7e2cfd8c 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -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 );
}
diff --git a/linux-core/drm_lock.c b/linux-core/drm_lock.c
index c10cfe2c..c887d1f6 100644
--- a/linux-core/drm_lock.c
+++ b/linux-core/drm_lock.c
@@ -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