This will be required in order to use the new function interface
(usb_get_function_instance/usb_put_function_instance)
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
Signed-off-by: Kyunmgin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/usb/gadget/f_fs.c | 41 ++++++++++++++++++++++++++++++++++++
drivers/usb/gadget/g_ffs.c | 50 ++++++++++++++++++++++++++-----------------
drivers/usb/gadget/u_fs.h | 2 +
3 files changed, 73 insertions(+), 20 deletions(-)
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index 277d193..bfbb580 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -361,6 +361,11 @@ ffs_sb_create_file(struct super_block *sb, const char *name, void *data,
const struct file_operations *fops,
struct dentry **dentry_p);
+/* Devices management *******************************************************/
+
+static struct ffs_dev *ffs_alloc_dev(void);
+static void ffs_free_dev(struct ffs_dev *dev);
+static struct ffs_dev *ffs_find_dev(const char *name);
/* Misc helper functions ****************************************************/
@@ -2465,6 +2470,42 @@ static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf)
}
+/* Devices management *******************************************************/
+
+static LIST_HEAD(ffs_devices);
+
+static struct ffs_dev *ffs_alloc_dev(void)
+{
+ struct ffs_dev *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ list_add(&dev->entry, &ffs_devices);
+
+ return dev;
+}
+
+static void ffs_free_dev(struct ffs_dev *dev)
+{
+ list_del(&dev->entry);
+
+ kfree(dev);
+}
+
+static struct ffs_dev *ffs_find_dev(const char *name)
+{
+ struct ffs_dev *dev;
+
+ list_for_each_entry(dev, &ffs_devices, entry)
+ if (strcmp(dev->name, name) == 0)
+ return dev;
+
+ return NULL;
+}
+
+
/* Misc helper functions ****************************************************/
static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
index 1aaa103..48b0940 100644
--- a/drivers/usb/gadget/g_ffs.c
+++ b/drivers/usb/gadget/g_ffs.c
@@ -174,35 +174,49 @@ static DEFINE_MUTEX(gfs_lock);
static unsigned int missing_funcs;
static bool gfs_registered;
static bool gfs_single_func;
-static struct ffs_dev *ffs_tab;
+static struct ffs_dev **ffs_tab;
static int __init gfs_init(void)
{
int i;
+ int ret = 0;
ENTER();
- if (!func_num) {
+ if (func_num < 2) {
gfs_single_func = true;
func_num = 1;
}
- ffs_tab = kcalloc(func_num, sizeof *ffs_tab, GFP_KERNEL);
+ ffs_tab = kcalloc(func_num, sizeof(*ffs_tab), GFP_KERNEL);
if (!ffs_tab)
return -ENOMEM;
- if (!gfs_single_func)
- for (i = 0; i < func_num; i++)
- ffs_tab[i].name = func_names[i];
+ for (i = 0; i < func_num; i++) {
+ ffs_tab[i] = ffs_alloc_dev();
+ if (IS_ERR(ffs_tab[i])) {
+ ret = PTR_ERR(ffs_tab[i]);
+ goto no_dev;
+ }
+ if (!gfs_single_func)
+ ffs_tab[i]->name = func_names[i];
+ }
missing_funcs = func_num;
return functionfs_init();
+no_dev:
+ while (--i >= 0)
+ ffs_free_dev(ffs_tab[i]);
+ kfree(ffs_tab);
+ return ret;
}
module_init(gfs_init);
static void __exit gfs_exit(void)
{
+ int i;
+
ENTER();
mutex_lock(&gfs_lock);
@@ -213,24 +227,20 @@ static void __exit gfs_exit(void)
functionfs_cleanup();
mutex_unlock(&gfs_lock);
+ for (i = 0; i < func_num; i++)
+ ffs_free_dev(ffs_tab[i]);
kfree(ffs_tab);
}
module_exit(gfs_exit);
static struct ffs_dev *gfs_find_dev(const char *dev_name)
{
- int i;
-
ENTER();
if (gfs_single_func)
- return &ffs_tab[0];
-
- for (i = 0; i < func_num; i++)
- if (strcmp(ffs_tab[i].name, dev_name) == 0)
- return &ffs_tab[i];
+ return ffs_tab[0];
- return NULL;
+ return ffs_find_dev(dev_name);
}
static int functionfs_ready_callback(struct ffs_data *ffs)
@@ -422,10 +432,10 @@ static int gfs_bind(struct usb_composite_dev *cdev)
gfs_dev_desc.iProduct = gfs_strings[USB_GADGET_PRODUCT_IDX].id;
for (i = func_num; i--; ) {
- ret = functionfs_bind(ffs_tab[i].ffs_data, cdev);
+ ret = functionfs_bind(ffs_tab[i]->ffs_data, cdev);
if (unlikely(ret < 0)) {
while (++i < func_num)
- functionfs_unbind(ffs_tab[i].ffs_data);
+ functionfs_unbind(ffs_tab[i]->ffs_data);
goto error_rndis;
}
}
@@ -448,7 +458,7 @@ static int gfs_bind(struct usb_composite_dev *cdev)
error_unbind:
for (i = 0; i < func_num; i++)
- functionfs_unbind(ffs_tab[i].ffs_data);
+ functionfs_unbind(ffs_tab[i]->ffs_data);
error_rndis:
#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
usb_put_function_instance(fi_rndis);
@@ -497,8 +507,8 @@ static int gfs_unbind(struct usb_composite_dev *cdev)
* do...?
*/
for (i = func_num; i--; )
- if (ffs_tab[i].ffs_data)
- functionfs_unbind(ffs_tab[i].ffs_data);
+ if (ffs_tab[i]->ffs_data)
+ functionfs_unbind(ffs_tab[i]->ffs_data);
return 0;
}
@@ -529,7 +539,7 @@ static int gfs_do_config(struct usb_configuration *c)
}
for (i = 0; i < func_num; i++) {
- ret = functionfs_bind_config(c->cdev, c, ffs_tab[i].ffs_data);
+ ret = functionfs_bind_config(c->cdev, c, ffs_tab[i]->ffs_data);
if (unlikely(ret < 0))
return ret;
}
diff --git a/drivers/usb/gadget/u_fs.h b/drivers/usb/gadget/u_fs.h
index 5d9229a..12f6970 100644
--- a/drivers/usb/gadget/u_fs.h
+++ b/drivers/usb/gadget/u_fs.h
@@ -17,12 +17,14 @@
#define U_FFS_H
#include <linux/usb/composite.h>
+#include <linux/list.h>
struct ffs_dev {
const char *name;
bool mounted;
bool desc_ready;
struct ffs_data *ffs_data;
+ struct list_head entry;
};
#endif /* U_FFS_H */
--
1.7.0.4
--
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