From 111534cd7a376b75e72ddea0c6d00ec956ce3343 Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki Date: Fri, 8 Mar 2013 10:45:50 +0900 Subject: [PATCH] firewire net: Introduce fwnet_broadcast_stop() to destroy broadcast resources. Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: Stefan Richter --- drivers/firewire/net.c | 68 ++++++++++++++++++++++-------------------- 1 file changed, 36 insertions(+), 32 deletions(-) diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c index 21210fb94762..ca41446d62f4 100644 --- a/drivers/firewire/net.c +++ b/drivers/firewire/net.c @@ -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; - - fw_iso_context_stop(dev->broadcast_rcv_context); + fwnet_broadcast_stop(dev); - 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); -- 2.20.1