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firewire net: Introduce fwnet_broadcast_stop() to destroy broadcast resources.

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
YOSHIFUJI Hideaki 2013-03-08 10:45:50 +09:00 committed by Stefan Richter
parent eac31d58ca
commit 111534cd7a
1 changed files with 36 additions and 32 deletions
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68
drivers/firewire/net.c
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@ -1146,6 +1146,32 @@ static int fwnet_fifo_start(struct fwnet_device *dev)
return 0;
}
static void __fwnet_broadcast_stop(struct fwnet_device *dev)
{
unsigned u;
if (dev->broadcast_state != FWNET_BROADCAST_ERROR) {
for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
kunmap(dev->broadcast_rcv_buffer.pages[u]);
fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
}
if (dev->broadcast_rcv_context) {
fw_iso_context_destroy(dev->broadcast_rcv_context);
dev->broadcast_rcv_context = NULL;
}
kfree(dev->broadcast_rcv_buffer_ptrs);
dev->broadcast_rcv_buffer_ptrs = NULL;
dev->broadcast_state = FWNET_BROADCAST_ERROR;
}
static void fwnet_broadcast_stop(struct fwnet_device *dev)
{
if (dev->broadcast_state == FWNET_BROADCAST_ERROR)
return;
fw_iso_context_stop(dev->broadcast_rcv_context);
__fwnet_broadcast_stop(dev);
}
static int fwnet_broadcast_start(struct fwnet_device *dev)
{
struct fw_iso_context *context;
@ -1166,7 +1192,7 @@ static int fwnet_broadcast_start(struct fwnet_device *dev)
ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
if (!ptrptr) {
retval = -ENOMEM;
goto failed_ptrs_alloc;
goto failed;
}
dev->broadcast_rcv_buffer_ptrs = ptrptr;
@ -1176,13 +1202,15 @@ static int fwnet_broadcast_start(struct fwnet_device *dev)
fwnet_receive_broadcast, dev);
if (IS_ERR(context)) {
retval = PTR_ERR(context);
goto failed_context_create;
goto failed;
}
retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card,
FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
if (retval < 0)
goto failed_buffer_init;
goto failed;
dev->broadcast_state = FWNET_BROADCAST_STOPPED;
for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
void *ptr;
@ -1206,7 +1234,7 @@ static int fwnet_broadcast_start(struct fwnet_device *dev)
retval = fw_iso_context_queue(context, &packet,
&dev->broadcast_rcv_buffer, offset);
if (retval < 0)
goto failed_rcv_queue;
goto failed;
offset += max_receive;
}
@ -1216,7 +1244,7 @@ static int fwnet_broadcast_start(struct fwnet_device *dev)
retval = fw_iso_context_start(context, -1, 0,
FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
if (retval < 0)
goto failed_rcv_queue;
goto failed;
/* FIXME: adjust it according to the min. speed of all known peers? */
dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
@ -1225,18 +1253,8 @@ static int fwnet_broadcast_start(struct fwnet_device *dev)
return 0;
failed_rcv_queue:
for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
kunmap(dev->broadcast_rcv_buffer.pages[u]);
fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
failed_buffer_init:
fw_iso_context_destroy(context);
dev->broadcast_rcv_context = NULL;
failed_context_create:
kfree(dev->broadcast_rcv_buffer_ptrs);
dev->broadcast_rcv_buffer_ptrs = NULL;
failed_ptrs_alloc:
failed:
__fwnet_broadcast_stop(dev);
return retval;
}
@ -1621,22 +1639,8 @@ static int fwnet_remove(struct device *_dev)
unregister_netdev(net);
fwnet_fifo_stop(dev);
if (dev->broadcast_rcv_context) {
unsigned u;
fwnet_broadcast_stop(dev);
fw_iso_context_stop(dev->broadcast_rcv_context);
for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
kunmap(dev->broadcast_rcv_buffer.pages[u]);
fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer,
dev->card);
fw_iso_context_destroy(dev->broadcast_rcv_context);
dev->broadcast_rcv_context = NULL;
kfree(dev->broadcast_rcv_buffer_ptrs);
dev->broadcast_rcv_buffer_ptrs = NULL;
dev->broadcast_state = FWNET_BROADCAST_ERROR;
}
for (i = 0; dev->queued_datagrams && i < 5; i++)
ssleep(1);
WARN_ON(dev->queued_datagrams);