ChangeSet 1.967, 2003/01/21 15:11:51+08:00, [EMAIL PROTECTED]
[PATCH] USB: simplify speedtouch receive urb lifecycle
speedtouch: simplify the receive urb lifecycle: allocate them in the usb probe
function,
free them on disconnect.
diff -Nru a/drivers/usb/misc/speedtouch.c b/drivers/usb/misc/speedtouch.c
--- a/drivers/usb/misc/speedtouch.c Tue Feb 4 15:18:09 2003
+++ b/drivers/usb/misc/speedtouch.c Tue Feb 4 15:18:09 2003
@@ -688,18 +688,6 @@
for (i = 0, succes = 0; i < UDSL_NUMBER_RCV_URBS; i++) {
struct udsl_data_ctx *ctx = &(instance->rcvbufs[i]);
- ctx->urb = NULL;
- ctx->skb = dev_alloc_skb (UDSL_RECEIVE_BUFFER_SIZE);
- if (!ctx->skb)
- continue;
-
- ctx->urb = usb_alloc_urb (0, GFP_KERNEL);
- if (!ctx->urb) {
- kfree_skb (ctx->skb);
- ctx->skb = NULL;
- break;
- };
-
usb_fill_bulk_urb (ctx->urb,
instance->usb_dev,
usb_rcvbulkpipe (instance->usb_dev,
UDSL_ENDPOINT_DATA_IN),
@@ -707,12 +695,6 @@
UDSL_RECEIVE_BUFFER_SIZE,
udsl_usb_data_receive, ctx);
-
- ctx->instance = instance;
-
- PDEBUG ("udsl_usb_data_init: usb with skb->truesize = %d (Asked for
%d)\n",
- ctx->skb->truesize, UDSL_RECEIVE_BUFFER_SIZE);
-
if (usb_submit_urb (ctx->urb, GFP_KERNEL) < 0)
PDEBUG ("udsl_usb_data_init: Submit failed, loosing urb.\n");
else
@@ -753,10 +735,6 @@
continue;
usb_unlink_urb (ctx->urb);
-
- usb_free_urb (ctx->urb);
- kfree_skb (ctx->skb);
- ctx->skb = NULL;
}
tasklet_kill (&instance->recvqueue_tasklet);
@@ -842,6 +820,27 @@
tasklet_init (&instance->recvqueue_tasklet, udsl_atm_processqueue, (unsigned
long) instance);
+ /* receive urb init */
+ for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) {
+ struct udsl_data_ctx *ctx = &(instance->rcvbufs[i]);
+
+ if (!(ctx->skb = dev_alloc_skb (UDSL_RECEIVE_BUFFER_SIZE))) {
+ PDEBUG ("No memory for skb %d!\n", i);
+ err = -ENOMEM;
+ goto fail_urbs;
+ }
+
+ if (!(ctx->urb = usb_alloc_urb (0, GFP_KERNEL))) {
+ PDEBUG ("No memory for receive urb %d!\n", i);
+ err = -ENOMEM;
+ goto fail_urbs;
+ }
+
+ ctx->instance = instance;
+
+ PDEBUG ("skb->truesize = %d (asked for %d)\n", ctx->skb->truesize,
+UDSL_RECEIVE_BUFFER_SIZE);
+ }
+
/* atm init */
if (!(instance->atm_dev = atm_dev_register (udsl_driver_name,
&udsl_atm_devops, -1, 0))) {
PDEBUG ("failed to register ATM device!\n");
@@ -874,6 +873,16 @@
return 0;
fail_atm:
+fail_urbs:
+ for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) {
+ struct udsl_data_ctx *ctx = &(instance->rcvbufs[i]);
+
+ if (ctx->skb)
+ kfree_skb (ctx->skb);
+
+ if (ctx->urb)
+ usb_free_urb (ctx->urb);
+ }
kfree (instance);
fail_instance:
return err;
@@ -882,20 +891,32 @@
static void udsl_usb_disconnect (struct usb_interface *intf)
{
struct udsl_instance_data *instance = usb_get_intfdata (intf);
+ int i;
PDEBUG ("disconnecting\n");
usb_set_intfdata (intf, NULL);
- if (instance) {
- /* unlinking receive buffers */
- udsl_usb_data_exit (instance);
-
- /* removing atm device */
- if (instance->atm_dev)
- udsl_atm_stopdevice (instance);
- kfree (instance);
+ if (!instance) {
+ PDEBUG ("NULL instance!\n");
+ return;
}
+
+ /* unlinking receive buffers */
+ udsl_usb_data_exit (instance);
+
+ for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) {
+ struct udsl_data_ctx *ctx = &(instance->rcvbufs[i]);
+
+ usb_free_urb (ctx->urb);
+ kfree_skb (ctx->skb);
+ }
+
+ /* removing atm device */
+ if (instance->atm_dev)
+ udsl_atm_stopdevice (instance);
+
+ kfree (instance);
}
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