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path: root/drivers/usb/gadget/function/f_fs.c
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Diffstat (limited to 'drivers/usb/gadget/function/f_fs.c')
-rw-r--r--drivers/usb/gadget/function/f_fs.c93
1 files changed, 51 insertions, 42 deletions
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 2ff7c21bbda5..6029f9b00b4a 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -247,8 +247,8 @@ EXPORT_SYMBOL_GPL(ffs_lock);
static struct ffs_dev *_ffs_find_dev(const char *name);
static struct ffs_dev *_ffs_alloc_dev(void);
static void _ffs_free_dev(struct ffs_dev *dev);
-static void *ffs_acquire_dev(const char *dev_name);
-static void ffs_release_dev(struct ffs_data *ffs_data);
+static int ffs_acquire_dev(const char *dev_name, struct ffs_data *ffs_data);
+static void ffs_release_dev(struct ffs_dev *ffs_dev);
static int ffs_ready(struct ffs_data *ffs);
static void ffs_closed(struct ffs_data *ffs);
@@ -1244,10 +1244,11 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
case FUNCTIONFS_ENDPOINT_DESC:
{
int desc_idx;
- struct usb_endpoint_descriptor *desc;
+ struct usb_endpoint_descriptor desc1, *desc;
switch (epfile->ffs->gadget->speed) {
case USB_SPEED_SUPER:
+ case USB_SPEED_SUPER_PLUS:
desc_idx = 2;
break;
case USB_SPEED_HIGH:
@@ -1256,10 +1257,12 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
default:
desc_idx = 0;
}
+
desc = epfile->ep->descs[desc_idx];
+ memcpy(&desc1, desc, desc->bLength);
spin_unlock_irq(&epfile->ffs->eps_lock);
- ret = copy_to_user((void *)value, desc, desc->bLength);
+ ret = copy_to_user((void *)value, &desc1, desc1.bLength);
if (ret)
ret = -EFAULT;
return ret;
@@ -1502,7 +1505,6 @@ ffs_fs_mount(struct file_system_type *t, int flags,
};
struct dentry *rv;
int ret;
- void *ffs_dev;
struct ffs_data *ffs;
ENTER();
@@ -1523,19 +1525,16 @@ ffs_fs_mount(struct file_system_type *t, int flags,
return ERR_PTR(-ENOMEM);
}
- ffs_dev = ffs_acquire_dev(dev_name);
- if (IS_ERR(ffs_dev)) {
+ ret = ffs_acquire_dev(dev_name, ffs);
+ if (ret) {
ffs_data_put(ffs);
- return ERR_CAST(ffs_dev);
+ return ERR_PTR(ret);
}
- ffs->private_data = ffs_dev;
data.ffs_data = ffs;
rv = mount_nodev(t, flags, &data, ffs_sb_fill);
- if (IS_ERR(rv) && data.ffs_data) {
- ffs_release_dev(data.ffs_data);
+ if (IS_ERR(rv) && data.ffs_data)
ffs_data_put(data.ffs_data);
- }
return rv;
}
@@ -1545,10 +1544,8 @@ ffs_fs_kill_sb(struct super_block *sb)
ENTER();
kill_litter_super(sb);
- if (sb->s_fs_info) {
- ffs_release_dev(sb->s_fs_info);
+ if (sb->s_fs_info)
ffs_data_closed(sb->s_fs_info);
- }
}
static struct file_system_type ffs_fs_type = {
@@ -1617,6 +1614,7 @@ static void ffs_data_put(struct ffs_data *ffs)
if (unlikely(refcount_dec_and_test(&ffs->ref))) {
pr_info("%s(): freeing\n", __func__);
ffs_data_clear(ffs);
+ ffs_release_dev(ffs->private_data);
BUG_ON(waitqueue_active(&ffs->ev.waitq) ||
waitqueue_active(&ffs->ep0req_completion.wait) ||
waitqueue_active(&ffs->wait));
@@ -1690,11 +1688,15 @@ static void ffs_data_clear(struct ffs_data *ffs)
BUG_ON(ffs->gadget);
- if (ffs->epfiles)
+ if (ffs->epfiles) {
ffs_epfiles_destroy(ffs->epfiles, ffs->eps_count);
+ ffs->epfiles = NULL;
+ }
- if (ffs->ffs_eventfd)
+ if (ffs->ffs_eventfd) {
eventfd_ctx_put(ffs->ffs_eventfd);
+ ffs->ffs_eventfd = NULL;
+ }
kfree(ffs->raw_descs_data);
kfree(ffs->raw_strings);
@@ -1707,7 +1709,6 @@ static void ffs_data_reset(struct ffs_data *ffs)
ffs_data_clear(ffs);
- ffs->epfiles = NULL;
ffs->raw_descs_data = NULL;
ffs->raw_descs = NULL;
ffs->raw_strings = NULL;
@@ -2540,6 +2541,7 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
do { /* lang_count > 0 so we can use do-while */
unsigned needed = needed_count;
+ u32 str_per_lang = str_count;
if (unlikely(len < 3))
goto error_free;
@@ -2575,7 +2577,7 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
data += length + 1;
len -= length + 1;
- } while (--str_count);
+ } while (--str_per_lang);
s->id = 0; /* terminator */
s->s = NULL;
@@ -2920,6 +2922,7 @@ static inline struct f_fs_opts *ffs_do_functionfs_bind(struct usb_function *f,
struct ffs_function *func = ffs_func_from_usb(f);
struct f_fs_opts *ffs_opts =
container_of(f->fi, struct f_fs_opts, func_inst);
+ struct ffs_data *ffs_data;
int ret;
ENTER();
@@ -2934,12 +2937,13 @@ static inline struct f_fs_opts *ffs_do_functionfs_bind(struct usb_function *f,
if (!ffs_opts->no_configfs)
ffs_dev_lock();
ret = ffs_opts->dev->desc_ready ? 0 : -ENODEV;
- func->ffs = ffs_opts->dev->ffs_data;
+ ffs_data = ffs_opts->dev->ffs_data;
if (!ffs_opts->no_configfs)
ffs_dev_unlock();
if (ret)
return ERR_PTR(ret);
+ func->ffs = ffs_data;
func->conf = c;
func->gadget = c->cdev->gadget;
@@ -3065,7 +3069,8 @@ static int _ffs_func_bind(struct usb_configuration *c,
}
if (likely(super)) {
- func->function.ss_descriptors = vla_ptr(vlabuf, d, ss_descs);
+ func->function.ss_descriptors = func->function.ssp_descriptors =
+ vla_ptr(vlabuf, d, ss_descs);
ss_len = ffs_do_descs(ffs->ss_descs_count,
vla_ptr(vlabuf, d, raw_descs) + fs_len + hs_len,
d_raw_descs__sz - fs_len - hs_len,
@@ -3393,6 +3398,7 @@ static void ffs_free_inst(struct usb_function_instance *f)
struct f_fs_opts *opts;
opts = to_f_fs_opts(f);
+ ffs_release_dev(opts->dev);
ffs_dev_lock();
_ffs_free_dev(opts->dev);
ffs_dev_unlock();
@@ -3454,6 +3460,9 @@ static void ffs_func_unbind(struct usb_configuration *c,
ffs->func = NULL;
}
+ /* Drain any pending AIO completions */
+ drain_workqueue(ffs->io_completion_wq);
+
if (!--opts->refcnt)
functionfs_unbind(ffs);
@@ -3475,6 +3484,7 @@ static void ffs_func_unbind(struct usb_configuration *c,
func->function.fs_descriptors = NULL;
func->function.hs_descriptors = NULL;
func->function.ss_descriptors = NULL;
+ func->function.ssp_descriptors = NULL;
func->interfaces_nums = NULL;
ffs_event_add(ffs, FUNCTIONFS_UNBIND);
@@ -3576,47 +3586,48 @@ static void _ffs_free_dev(struct ffs_dev *dev)
{
list_del(&dev->entry);
- /* Clear the private_data pointer to stop incorrect dev access */
- if (dev->ffs_data)
- dev->ffs_data->private_data = NULL;
-
kfree(dev);
if (list_empty(&ffs_devices))
functionfs_cleanup();
}
-static void *ffs_acquire_dev(const char *dev_name)
+static int ffs_acquire_dev(const char *dev_name, struct ffs_data *ffs_data)
{
+ int ret = 0;
struct ffs_dev *ffs_dev;
ENTER();
ffs_dev_lock();
ffs_dev = _ffs_find_dev(dev_name);
- if (!ffs_dev)
- ffs_dev = ERR_PTR(-ENOENT);
- else if (ffs_dev->mounted)
- ffs_dev = ERR_PTR(-EBUSY);
- else if (ffs_dev->ffs_acquire_dev_callback &&
- ffs_dev->ffs_acquire_dev_callback(ffs_dev))
- ffs_dev = ERR_PTR(-ENOENT);
- else
+ if (!ffs_dev) {
+ ret = -ENOENT;
+ } else if (ffs_dev->mounted) {
+ ret = -EBUSY;
+ } else if (ffs_dev->ffs_acquire_dev_callback &&
+ ffs_dev->ffs_acquire_dev_callback(ffs_dev)) {
+ ret = -ENOENT;
+ } else {
ffs_dev->mounted = true;
+ ffs_dev->ffs_data = ffs_data;
+ ffs_data->private_data = ffs_dev;
+ }
ffs_dev_unlock();
- return ffs_dev;
+ return ret;
}
-static void ffs_release_dev(struct ffs_data *ffs_data)
+static void ffs_release_dev(struct ffs_dev *ffs_dev)
{
- struct ffs_dev *ffs_dev;
-
ENTER();
ffs_dev_lock();
- ffs_dev = ffs_data->private_data;
- if (ffs_dev) {
+ if (ffs_dev && ffs_dev->mounted) {
ffs_dev->mounted = false;
+ if (ffs_dev->ffs_data) {
+ ffs_dev->ffs_data->private_data = NULL;
+ ffs_dev->ffs_data = NULL;
+ }
if (ffs_dev->ffs_release_dev_callback)
ffs_dev->ffs_release_dev_callback(ffs_dev);
@@ -3644,7 +3655,6 @@ static int ffs_ready(struct ffs_data *ffs)
}
ffs_obj->desc_ready = true;
- ffs_obj->ffs_data = ffs;
if (ffs_obj->ffs_ready_callback) {
ret = ffs_obj->ffs_ready_callback(ffs);
@@ -3672,7 +3682,6 @@ static void ffs_closed(struct ffs_data *ffs)
goto done;
ffs_obj->desc_ready = false;
- ffs_obj->ffs_data = NULL;
if (test_and_clear_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags) &&
ffs_obj->ffs_closed_callback)
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-30 12:01:12 +0000