system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-21 09:13:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

Address some WITNESS panics that occur when using the via driver.

Browse source 
Some of these cases should be safe in a non-atomic fashion, however
since all of the driver ioctls are locked, a lot of work is required to
fix it correctly.  Just don't sleep now.

MFC after:	2 weeks
This commit is contained in:
Robert Noland 2010-04-23 14:48:30 +00:00
parent 2f826fdf53
commit 05d841b38b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=207118
4 changed files with 10 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
sys/dev/drm/drmP.h
View file

@ -228,7 +228,7 @@ enum {
#define DRM_MTRR_WC MDF_WRITECOMBINE
#define jiffies ticks
typedef unsigned long dma_addr_t;
typedef vm_paddr_t dma_addr_t;
typedef u_int64_t u64;
typedef u_int32_t u32;
typedef u_int16_t u16;

3
sys/dev/drm/drm_hashtab.c
View file

@ -46,7 +46,8 @@ int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
ht->size = 1 << order;
ht->order = order;
ht->table = NULL;
ht->table = hashinit(ht->size, DRM_MEM_HASHTAB, &ht->mask);
ht->table = hashinit_flags(ht->size, DRM_MEM_HASHTAB, &ht->mask,
HASH_NOWAIT);
if (!ht->table) {
DRM_ERROR("Out of memory for hash table\n");
return -ENOMEM;

3
sys/dev/drm/drm_mm.c
View file

@ -333,7 +333,8 @@ int drm_mm_init(struct drm_mm * mm, unsigned long start, unsigned long size)
mm->num_unused = 0;
mtx_init(&mm->unused_lock, "drm_unused", NULL, MTX_DEF);
return drm_mm_create_tail_node(mm, start, size, 0);
/* XXX This could be non-atomic but gets called from a locked path */
return drm_mm_create_tail_node(mm, start, size, 1);
}
void drm_mm_takedown(struct drm_mm * mm)

10
sys/dev/drm/drm_sman.c
View file

@ -96,7 +96,8 @@ static void *drm_sman_mm_allocate(void *private, unsigned long size,
if (!tmp) {
return NULL;
}
tmp = drm_mm_get_block(tmp, size, alignment);
/* This could be non-atomic, but we are called from a locked path */
tmp = drm_mm_get_block_atomic(tmp, size, alignment);
return tmp;
}
@ -131,7 +132,7 @@ drm_sman_set_range(struct drm_sman * sman, unsigned int manager,
KASSERT(manager < sman->num_managers, ("Invalid manager"));
sman_mm = &sman->mm[manager];
mm = malloc(sizeof(*mm), DRM_MEM_MM, M_WAITOK | M_ZERO);
mm = malloc(sizeof(*mm), DRM_MEM_MM, M_NOWAIT | M_ZERO);
if (!mm) {
return -ENOMEM;
}
@ -174,7 +175,7 @@ static struct drm_owner_item *drm_sman_get_owner_item(struct drm_sman * sman,
owner_hash);
}
owner_item = malloc(sizeof(*owner_item), DRM_MEM_MM, M_WAITOK | M_ZERO);
owner_item = malloc(sizeof(*owner_item), DRM_MEM_MM, M_NOWAIT | M_ZERO);
if (!owner_item)
goto out;
@ -206,12 +207,11 @@ struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int man
sman_mm = &sman->mm[manager];
tmp = sman_mm->allocate(sman_mm->private, size, alignment);
if (!tmp) {
return NULL;
}
memblock = malloc(sizeof(*memblock), DRM_MEM_MM, M_WAITOK | M_ZERO);
memblock = malloc(sizeof(*memblock), DRM_MEM_MM, M_NOWAIT | M_ZERO);
DRM_DEBUG("allocated mem_block %p\n", memblock);
if (!memblock)
goto out;