Subject: [PATCH 007/008] USB: serial: modifications in sierra_startup() and
sierra_shutdown() functions
From: Elina Pasheva <epasheva@xxxxxxxxxxxxxxxxxx>
The following is summary of changes we have made to sierra.c driver in
[PATCH 007/008] from the series dealing with improving urb handling:
- Modified sierra_startup() so that allocation of urbs happens whenever an
interface is activated (urb allocation is moved to sierra_open()).
- Modified sierra_shutdown() so that urbs are freed whenever an interface is
de-activated (urb freeing moved to sierra_close() as shown in previous patch
from the series)
- Removed unecessary data structure from sierra_port_private_data
Signed-off-by: Elina Pasheva <epasheva@xxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/sierra.c | 40 +---------------------------------
1 file changed, 2 insertions(+), 38 deletions(-)
--- a/drivers/usb/serial/sierra.c 2009-05-04 18:59:15.000000000 -0700
+++ a/drivers/usb/serial/sierra.c 2009-05-04 19:02:23.000000000 -0700
@@ -252,7 +252,6 @@ struct sierra_port_private {
/* Input endpoints and buffers for this port */
struct urb *in_urbs[N_IN_URB];
- char *in_buffer[N_IN_URB];
/* Settings for the port */
int rts_state; /* Handshaking pins (outputs) */
@@ -782,9 +781,7 @@ static int sierra_startup(struct usb_ser
{
struct usb_serial_port *port;
struct sierra_port_private *portdata;
- struct urb *urb;
int i;
- int j;
dev_dbg(&serial->dev->dev, "%s\n", __func__);
@@ -805,35 +802,8 @@ static int sierra_startup(struct usb_ser
__func__, i);
return -ENOMEM;
}
- spin_lock_init(&portdata->lock);
- for (j = 0; j < N_IN_URB; j++) {
- portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
- if (!portdata->in_buffer[j]) {
- for (--j; j >= 0; j--)
- kfree(portdata->in_buffer[j]);
- kfree(portdata);
- return -ENOMEM;
- }
- }
-
+ /* Set the port private data pointer */
usb_set_serial_port_data(port, portdata);
-
- /* initialize the in urbs */
- for (j = 0; j < N_IN_URB; ++j) {
- urb = usb_alloc_urb(0, GFP_KERNEL);
- if (urb == NULL) {
- dev_dbg(&port->dev, "%s: alloc for in "
- "port failed.\n", __func__);
- continue;
- }
- /* Fill URB using supplied data. */
- usb_fill_bulk_urb(urb, serial->dev,
- usb_rcvbulkpipe(serial->dev,
- port->bulk_in_endpointAddress),
- portdata->in_buffer[j], IN_BUFLEN,
- sierra_indat_callback, port);
- portdata->in_urbs[j] = urb;
- }
}
return 0;
@@ -841,7 +811,7 @@ static int sierra_startup(struct usb_ser
static void sierra_shutdown(struct usb_serial *serial)
{
- int i, j;
+ int i;
struct usb_serial_port *port;
struct sierra_port_private *portdata;
@@ -854,12 +824,6 @@ static void sierra_shutdown(struct usb_s
portdata = usb_get_serial_port_data(port);
if (!portdata)
continue;
-
- for (j = 0; j < N_IN_URB; j++) {
- usb_kill_urb(portdata->in_urbs[j]);
- usb_free_urb(portdata->in_urbs[j]);
- kfree(portdata->in_buffer[j]);
- }
kfree(portdata);
usb_set_serial_port_data(port, NULL);
}
--
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