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Merge tag 'drm-misc-fixes-2020-07-15' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

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* aspeed: setup fbdev console after registering device; avoids warning
   and stacktrace in dmesg log
 * dmabuf: protect dmabuf->name with a spinlock; avoids sleeping in
   atomic context

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200715171756.GA18606@linux-uq9g
This commit is contained in:
Dave Airlie
2020-07-16 10:09:55 +10:00
parent 8257a0d913 6348dd291e
commit 03d54ef0a1
3 changed files with 9 additions and 6 deletions
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11
drivers/dma-buf/dma-buf.c
View File

@@ -45,10 +45,10 @@ static char *dmabuffs_dname(struct dentry *dentry, char *buffer, int buflen)
size_t ret = 0;
dmabuf = dentry->d_fsdata;
dma_resv_lock(dmabuf->resv, NULL);
spin_lock(&dmabuf->name_lock);
if (dmabuf->name)
ret = strlcpy(name, dmabuf->name, DMA_BUF_NAME_LEN);
dma_resv_unlock(dmabuf->resv);
spin_unlock(&dmabuf->name_lock);
return dynamic_dname(dentry, buffer, buflen, "/%s:%s",
dentry->d_name.name, ret > 0 ? name : "");
@@ -338,8 +338,10 @@ static long dma_buf_set_name(struct dma_buf *dmabuf, const char __user *buf)
kfree(name);
goto out_unlock;
}
spin_lock(&dmabuf->name_lock);
kfree(dmabuf->name);
dmabuf->name = name;
spin_unlock(&dmabuf->name_lock);
out_unlock:
dma_resv_unlock(dmabuf->resv);
@@ -402,10 +404,10 @@ static void dma_buf_show_fdinfo(struct seq_file *m, struct file *file)
/* Don't count the temporary reference taken inside procfs seq_show */
seq_printf(m, "count:\t%ld\n", file_count(dmabuf->file) - 1);
seq_printf(m, "exp_name:\t%s\n", dmabuf->exp_name);
dma_resv_lock(dmabuf->resv, NULL);
spin_lock(&dmabuf->name_lock);
if (dmabuf->name)
seq_printf(m, "name:\t%s\n", dmabuf->name);
dma_resv_unlock(dmabuf->resv);
spin_unlock(&dmabuf->name_lock);
}
static const struct file_operations dma_buf_fops = {
@@ -542,6 +544,7 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info)
dmabuf->size = exp_info->size;
dmabuf->exp_name = exp_info->exp_name;
dmabuf->owner = exp_info->owner;
spin_lock_init(&dmabuf->name_lock);
init_waitqueue_head(&dmabuf->poll);
dmabuf->cb_excl.poll = dmabuf->cb_shared.poll = &dmabuf->poll;
dmabuf->cb_excl.active = dmabuf->cb_shared.active = 0;

3
drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
View File

@@ -173,8 +173,6 @@ static int aspeed_gfx_load(struct drm_device *drm)
drm_mode_config_reset(drm);
drm_fbdev_generic_setup(drm, 32);
return 0;
}
@@ -225,6 +223,7 @@ static int aspeed_gfx_probe(struct platform_device *pdev)
if (ret)
goto err_unload;
drm_fbdev_generic_setup(&priv->drm, 32);
return 0;
err_unload:

1
include/linux/dma-buf.h
View File

@@ -311,6 +311,7 @@ struct dma_buf {
void *vmap_ptr;
const char *exp_name;
const char *name;
spinlock_t name_lock; /* spinlock to protect name access */
struct module *owner;
struct list_head list_node;
void *priv;