As the configuration is not complete at the time of thread
creation, defering the file-storage thread wakeup till the end.
Also stop the thread in case of failure during configuration.
Signed-off-by: Sanjay Singh Rawat <snjs...@gmail.com>
---
drivers/usb/gadget/function/f_mass_storage.c | 75 ++--------------------------
drivers/usb/gadget/function/f_mass_storage.h | 68 ++++++++++++++++++++++++-
drivers/usb/gadget/legacy/acm_ms.c | 5 ++
drivers/usb/gadget/legacy/mass_storage.c | 4 ++
drivers/usb/gadget/legacy/multi.c | 4 ++
5 files changed, 83 insertions(+), 73 deletions(-)
diff --git a/drivers/usb/gadget/function/f_mass_storage.c
b/drivers/usb/gadget/function/f_mass_storage.c
index 0e90e38..560e73d 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -251,76 +251,6 @@ static struct usb_gadget_strings *fsg_strings_array[] = {
/*-------------------------------------------------------------------------*/
-struct fsg_dev;
-struct fsg_common;
-
-/* Data shared by all the FSG instances. */
-struct fsg_common {
- struct usb_gadget *gadget;
- struct usb_composite_dev *cdev;
- struct fsg_dev *fsg, *new_fsg;
- wait_queue_head_t fsg_wait;
-
- /* filesem protects: backing files in use */
- struct rw_semaphore filesem;
-
- /* lock protects: state, all the req_busy's */
- spinlock_t lock;
-
- struct usb_ep *ep0; /* Copy of gadget->ep0 */
- struct usb_request *ep0req; /* Copy of cdev->req */
- unsigned int ep0_req_tag;
-
- struct fsg_buffhd *next_buffhd_to_fill;
- struct fsg_buffhd *next_buffhd_to_drain;
- struct fsg_buffhd *buffhds;
- unsigned int fsg_num_buffers;
-
- int cmnd_size;
- u8 cmnd[MAX_COMMAND_SIZE];
-
- unsigned int nluns;
- unsigned int lun;
- struct fsg_lun **luns;
- struct fsg_lun *curlun;
-
- unsigned int bulk_out_maxpacket;
- enum fsg_state state; /* For exception handling */
- unsigned int exception_req_tag;
-
- enum data_direction data_dir;
- u32 data_size;
- u32 data_size_from_cmnd;
- u32 tag;
- u32 residue;
- u32 usb_amount_left;
-
- unsigned int can_stall:1;
- unsigned int free_storage_on_release:1;
- unsigned int phase_error:1;
- unsigned int short_packet_received:1;
- unsigned int bad_lun_okay:1;
- unsigned int running:1;
- unsigned int sysfs:1;
-
- int thread_wakeup_needed;
- struct completion thread_notifier;
- struct task_struct *thread_task;
-
- /* Callback functions. */
- const struct fsg_operations *ops;
- /* Gadget's private data. */
- void *private_data;
-
- /*
- * Vendor (8 chars), product (16 chars), release (4
- * hexadecimal digits) and NUL byte
- */
- char inquiry_string[8 + 16 + 4 + 1];
-
- struct kref ref;
-};
-
struct fsg_dev {
struct usb_function function;
struct usb_gadget *gadget; /* Copy of cdev->gadget */
@@ -3013,8 +2943,6 @@ int fsg_common_run_thread(struct fsg_common *common)
DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task));
- wake_up_process(common->thread_task);
-
return 0;
}
EXPORT_SYMBOL_GPL(fsg_common_run_thread);
@@ -3121,6 +3049,9 @@ static int fsg_bind(struct usb_configuration *c, struct
usb_function *f)
if (ret)
goto autoconf_fail;
+ /* wakeup the thread */
+ wake_up_process(fsg->common->thread_task);
+
return 0;
autoconf_fail:
diff --git a/drivers/usb/gadget/function/f_mass_storage.h
b/drivers/usb/gadget/function/f_mass_storage.h
index b4866fc..c05fe16 100644
--- a/drivers/usb/gadget/function/f_mass_storage.h
+++ b/drivers/usb/gadget/function/f_mass_storage.h
@@ -57,7 +57,73 @@ struct fsg_module_parameters {
#endif
-struct fsg_common;
+/* Data shared by all the FSG instances. */
+struct fsg_common {
+ struct usb_gadget *gadget;
+ struct usb_composite_dev *cdev;
+ struct fsg_dev *fsg, *new_fsg;
+ wait_queue_head_t fsg_wait;
+
+ /* filesem protects: backing files in use */
+ struct rw_semaphore filesem;
+
+ /* lock protects: state, all the req_busy's */
+ spinlock_t lock;
+
+ struct usb_ep *ep0; /* Copy of gadget->ep0 */
+ struct usb_request *ep0req; /* Copy of cdev->req */
+ unsigned int ep0_req_tag;
+
+ struct fsg_buffhd *next_buffhd_to_fill;
+ struct fsg_buffhd *next_buffhd_to_drain;
+ struct fsg_buffhd *buffhds;
+ unsigned int fsg_num_buffers;
+
+ int cmnd_size;
+ u8 cmnd[MAX_COMMAND_SIZE];
+
+ unsigned int nluns;
+ unsigned int lun;
+ struct fsg_lun **luns;
+ struct fsg_lun *curlun;
+
+ unsigned int bulk_out_maxpacket;
+ enum fsg_state state; /* For exception handling */
+ unsigned int exception_req_tag;
+
+ enum data_direction data_dir;
+
+ u32 data_size;
+ u32 data_size_from_cmnd;
+ u32 tag;
+ u32 residue;
+ u32 usb_amount_left;
+
+ unsigned int can_stall:1;
+ unsigned int free_storage_on_release:1;
+ unsigned int phase_error:1;
+ unsigned int short_packet_received:1;
+ unsigned int bad_lun_okay:1;
+ unsigned int running:1;
+ unsigned int sysfs:1;
+
+ int thread_wakeup_needed;
+ struct completion thread_notifier;
+ struct task_struct *thread_task;
+
+ /* Callback functions. */
+ const struct fsg_operations *ops;
+ /* Gadget's private data. */
+ void *private_data;
+
+ /*
+ * Vendor (8 chars), product (16 chars), release (4
+ * hexadecimal digits) and NUL byte
+ */
+ char inquiry_string[8 + 16 + 4 + 1];
+
+ struct kref ref;
+};
/* FSF callback functions */
struct fsg_operations {
diff --git a/drivers/usb/gadget/legacy/acm_ms.c
b/drivers/usb/gadget/legacy/acm_ms.c
index 1194b09..bbdb867 100644
--- a/drivers/usb/gadget/legacy/acm_ms.c
+++ b/drivers/usb/gadget/legacy/acm_ms.c
@@ -15,6 +15,7 @@
*/
#include <linux/kernel.h>
+#include <linux/kthread.h>
#include <linux/module.h>
#include "u_serial.h"
@@ -155,8 +156,12 @@ static int acm_ms_do_config(struct usb_configuration *c)
if (status)
goto remove_acm;
+ /* wakeup the thread */
+ wake_up_process(opts->common->thread_task);
+
return 0;
remove_acm:
+ kthread_stop(opts->common->thread_task);
usb_remove_function(c, f_acm);
put_msg:
usb_put_function(f_msg);
diff --git a/drivers/usb/gadget/legacy/mass_storage.c
b/drivers/usb/gadget/legacy/mass_storage.c
index e7bfb08..ee1f61f 100644
--- a/drivers/usb/gadget/legacy/mass_storage.c
+++ b/drivers/usb/gadget/legacy/mass_storage.c
@@ -154,9 +154,13 @@ static int msg_do_config(struct usb_configuration *c)
if (ret)
goto put_func;
+ /* wakeup the thread */
+ wake_up_process(opts->common->thread_task);
+
return 0;
put_func:
+ kthread_stop(opts->common->thread_task);
usb_put_function(f_msg);
return ret;
}
diff --git a/drivers/usb/gadget/legacy/multi.c
b/drivers/usb/gadget/legacy/multi.c
index b21b51f..f9d8d13 100644
--- a/drivers/usb/gadget/legacy/multi.c
+++ b/drivers/usb/gadget/legacy/multi.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
+#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/netdevice.h>
@@ -192,8 +193,11 @@ static int rndis_do_config(struct usb_configuration *c)
if (ret)
goto err_run;
+ /* wakeup the thread */
+ wake_up_process(fsg_opts->common->thread_task);
return 0;
err_run:
+ kthread_stop(fsg_opts->common->thread_task);
usb_put_function(f_msg_rndis);
err_fsg:
usb_remove_function(c, f_acm_rndis);
--
1.8.3.2
--
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