[PATCH] USB: convert a bunch of USB semaphores to mutexes

the patch below converts a bunch of semaphores-used-as-mutex in the USB
code to mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/usb/media/ov511.h b/drivers/usb/media/ov511.h
index 086509a137c6..bce9b3633889 100644
--- a/drivers/usb/media/ov511.h
+++ b/drivers/usb/media/ov511.h
@@ -5,6 +5,7 @@
 #include <linux/videodev.h>
 #include <linux/smp_lock.h>
 #include <linux/usb.h>
+#include <linux/mutex.h>
 
 #define OV511_DEBUG     /* Turn on debug messages */
 
@@ -435,7 +436,7 @@ struct usb_ov511 {
 
         int led_policy;         /* LED: off|on|auto; OV511+ only */
 
-        struct semaphore lock;  /* Serializes user-accessible operations */
+        struct mutex lock;      /* Serializes user-accessible operations */
         int user;               /* user count for exclusive use */
 
         int streaming;          /* Are we streaming Isochronous? */
@@ -473,11 +474,9 @@ struct usb_ov511 {
         int packet_size;        /* Frame size per isoc desc */
         int packet_numbering;   /* Is ISO frame numbering enabled? */
 
-        struct semaphore param_lock;    /* params lock for this camera */
-
         /* Framebuffer/sbuf management */
         int buf_state;
-        struct semaphore buf_lock;
+        struct mutex buf_lock;
 
         struct ov51x_decomp_ops *decomp_ops;
 
@@ -494,12 +493,12 @@ struct usb_ov511 {
         int pal;                /* Device is designed for PAL resolution */
 
         /* I2C interface */
-        struct semaphore i2c_lock;        /* Protect I2C controller regs */
+        struct mutex i2c_lock;    /* Protect I2C controller regs */
         unsigned char primary_i2c_slave;  /* I2C write id of sensor */
 
         /* Control transaction stuff */
         unsigned char *cbuf;            /* Buffer for payload */
-        struct semaphore cbuf_lock;
+        struct mutex cbuf_lock;
 };
 
 /* Used to represent a list of values and their respective symbolic names */