USB: cdc-acm: re-write read processing
Kill rx tasklet, which is no longer needed, and re-write read processing.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 7282d1f..7b5c0bd 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -72,16 +72,10 @@
};
struct acm_rb {
- struct list_head list;
int size;
unsigned char *base;
dma_addr_t dma;
-};
-
-struct acm_ru {
- struct list_head list;
- struct acm_rb *buffer;
- struct urb *urb;
+ int index;
struct acm *instance;
};
@@ -97,34 +91,30 @@
unsigned int country_code_size; /* size of this buffer */
unsigned int country_rel_date; /* release date of version */
struct acm_wb wb[ACM_NW];
- struct acm_ru ru[ACM_NR];
- struct acm_rb rb[ACM_NR];
+ unsigned long read_urbs_free;
+ struct urb *read_urbs[ACM_NR];
+ struct acm_rb read_buffers[ACM_NR];
int rx_buflimit;
int rx_endpoint;
spinlock_t read_lock;
- struct list_head spare_read_urbs;
- struct list_head spare_read_bufs;
- struct list_head filled_read_bufs;
int write_used; /* number of non-empty write buffers */
- int processing;
int transmitting;
spinlock_t write_lock;
struct mutex mutex;
struct usb_cdc_line_coding line; /* bits, stop, parity */
struct work_struct work; /* work queue entry for line discipline waking up */
- struct tasklet_struct urb_task; /* rx processing */
- spinlock_t throttle_lock; /* synchronize throtteling and read callback */
unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
unsigned int ctrlout; /* output control lines (DTR, RTS) */
unsigned int writesize; /* max packet size for the output bulk endpoint */
unsigned int readsize,ctrlsize; /* buffer sizes for freeing */
unsigned int minor; /* acm minor number */
- unsigned char throttle; /* throttled by tty layer */
unsigned char clocal; /* termios CLOCAL */
unsigned int ctrl_caps; /* control capabilities from the class specific header */
unsigned int susp_count; /* number of suspended interfaces */
unsigned int combined_interfaces:1; /* control and data collapsed */
unsigned int is_int_ep:1; /* interrupt endpoints contrary to spec used */
+ unsigned int throttled:1; /* actually throttled */
+ unsigned int throttle_req:1; /* throttle requested */
u8 bInterval;
struct acm_wb *delayed_wb; /* write queued for a device about to be woken */
};