diff options
author | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-01 04:09:45 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-15 19:02:02 (GMT) |
commit | 02fafbc619a57dd4b850ed6af47a40bbb8e1eae8 (patch) | |
tree | c8c6fe362fec8c0b71ee3378bd90c2aaf84972a4 /drivers/staging/hv | |
parent | 0831ad041fd3611b31c10b46b9716b3c6289f1a1 (diff) | |
download | linux-fsl-qoriq-02fafbc619a57dd4b850ed6af47a40bbb8e1eae8.tar.xz |
Staging: hv: coding style cleanups for netvsc_drv.c
There are still some horrible long lines in here, which some simple
code reworking will make smaller and easier to understand.
Also note the FIXME in struct netvsc_driver_context...
Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/hv')
-rw-r--r-- | drivers/staging/hv/netvsc_drv.c | 448 |
1 files changed, 186 insertions, 262 deletions
diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c index bec135b..46056c6 100644 --- a/drivers/staging/hv/netvsc_drv.c +++ b/drivers/staging/hv/netvsc_drv.c @@ -1,5 +1,4 @@ /* - * * Copyright (c) 2009, Microsoft Corporation. * * This program is free software; you can redistribute it and/or modify it @@ -17,9 +16,7 @@ * * Authors: * Hank Janssen <hjanssen@microsoft.com> - * */ - #include <linux/init.h> #include <linux/module.h> #include <linux/highmem.h> @@ -35,68 +32,49 @@ #include <net/route.h> #include <net/sock.h> #include <net/pkt_sched.h> - #include "osd.h" #include "logging.h" #include "vmbus.h" - #include "NetVscApi.h" MODULE_LICENSE("GPL"); - -/* Static decl */ - static int netvsc_probe(struct device *device); static int netvsc_remove(struct device *device); static int netvsc_open(struct net_device *net); static void netvsc_xmit_completion(void *context); -static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net); -static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_packet *Packet); +static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net); +static int netvsc_recv_callback(struct hv_device *device_obj, + struct hv_netvsc_packet *Packet); static int netvsc_close(struct net_device *net); static struct net_device_stats *netvsc_get_stats(struct net_device *net); -static void netvsc_linkstatus_callback(struct hv_device *device_obj, unsigned int status); - +static void netvsc_linkstatus_callback(struct hv_device *device_obj, + unsigned int status); -/* Data types */ struct net_device_context { - struct device_context *device_ctx; /* point back to our device context */ + /* point back to our device context */ + struct device_context *device_ctx; struct net_device_stats stats; }; struct netvsc_driver_context { /* !! These must be the first 2 fields !! */ /* Which is a bug FIXME! */ - struct driver_context drv_ctx; + struct driver_context drv_ctx; struct netvsc_driver drv_obj; }; - -/* Globals */ - - static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; /* The one and only one */ static struct netvsc_driver_context g_netvsc_drv; - -/* Routines */ - - -/*++ - -Name: netvsc_drv_init() - -Desc: NetVsc driver initialization - ---*/ static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) { - int ret=0; - struct netvsc_driver *net_drv_obj=&g_netvsc_drv.drv_obj; - struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx; + struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; + struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; + int ret; DPRINT_ENTER(NETVSC_DRV); @@ -110,7 +88,8 @@ static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) pfn_drv_init(&net_drv_obj->Base); drv_ctx->driver.name = net_drv_obj->Base.name; - memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, sizeof(struct hv_guid)); + memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, + sizeof(struct hv_guid)); drv_ctx->probe = netvsc_probe; drv_ctx->remove = netvsc_remove; @@ -123,13 +102,6 @@ static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) return ret; } -/*++ - -Name: netvsc_get_stats() - -Desc: Get the network stats - ---*/ static struct net_device_stats *netvsc_get_stats(struct net_device *net) { struct net_device_context *net_device_ctx = netdev_priv(net); @@ -137,62 +109,41 @@ static struct net_device_stats *netvsc_get_stats(struct net_device *net) return &net_device_ctx->stats; } -/*++ - -Name: netvsc_set_multicast_list() - -Desc: Set the multicast list - -Remark: No-op here ---*/ static void netvsc_set_multicast_list(struct net_device *net) { } - static const struct net_device_ops device_ops = { - .ndo_open = netvsc_open, - .ndo_stop = netvsc_close, - .ndo_start_xmit = netvsc_start_xmit, - .ndo_get_stats = netvsc_get_stats, - .ndo_set_multicast_list = netvsc_set_multicast_list, + .ndo_open = netvsc_open, + .ndo_stop = netvsc_close, + .ndo_start_xmit = netvsc_start_xmit, + .ndo_get_stats = netvsc_get_stats, + .ndo_set_multicast_list = netvsc_set_multicast_list, }; -/*++ - -Name: netvsc_probe() - -Desc: Add the specified new device to this driver - ---*/ static int netvsc_probe(struct device *device) { - int ret=0; - - struct driver_context *driver_ctx = driver_to_driver_context(device->driver); - struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; + struct driver_context *driver_ctx = + driver_to_driver_context(device->driver); + struct netvsc_driver_context *net_drv_ctx = + (struct netvsc_driver_context *)driver_ctx; struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; - struct device_context *device_ctx = device_to_device_context(device); struct hv_device *device_obj = &device_ctx->device_obj; - struct net_device *net = NULL; struct net_device_context *net_device_ctx; struct netvsc_device_info device_info; + int ret; DPRINT_ENTER(NETVSC_DRV); if (!net_drv_obj->Base.OnDeviceAdd) - { return -1; - } - net = alloc_netdev(sizeof(struct net_device_context), "seth%d", ether_setup); - /* net = alloc_etherdev(sizeof(struct net_device_context)); */ + net = alloc_netdev(sizeof(struct net_device_context), "seth%d", + ether_setup); if (!net) - { return -1; - } /* Set initial state */ netif_carrier_off(net); @@ -203,25 +154,27 @@ static int netvsc_probe(struct device *device) dev_set_drvdata(device, net); /* Notify the netvsc driver of the new device */ - ret = net_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info); - if (ret != 0) - { + ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); + if (ret != 0) { free_netdev(net); dev_set_drvdata(device, NULL); - DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", ret); + DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", + ret); return ret; } - /* If carrier is still off ie we did not get a link status callback, update it if necessary */ - /* FIXME: We should use a atomic or test/set instead to avoid getting out of sync with the device's link status */ + /* + * If carrier is still off ie we did not get a link status callback, + * update it if necessary + */ + /* + * FIXME: We should use a atomic or test/set instead to avoid getting + * out of sync with the device's link status + */ if (!netif_carrier_ok(net)) - { if (!device_info.LinkState) - { netif_carrier_on(net); - } - } memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); @@ -230,40 +183,37 @@ static int netvsc_probe(struct device *device) SET_NETDEV_DEV(net, device); ret = register_netdev(net); - if (ret != 0) - { + if (ret != 0) { /* Remove the device and release the resource */ net_drv_obj->Base.OnDeviceRemove(device_obj); free_netdev(net); } DPRINT_EXIT(NETVSC_DRV); - return ret; } static int netvsc_remove(struct device *device) { - int ret=0; - struct driver_context *driver_ctx = driver_to_driver_context(device->driver); - struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; + struct driver_context *driver_ctx = + driver_to_driver_context(device->driver); + struct netvsc_driver_context *net_drv_ctx = + (struct netvsc_driver_context *)driver_ctx; struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; - struct device_context *device_ctx = device_to_device_context(device); struct net_device *net = dev_get_drvdata(&device_ctx->device); struct hv_device *device_obj = &device_ctx->device_obj; + int ret; DPRINT_ENTER(NETVSC_DRV); - if (net == NULL) - { + if (net == NULL) { DPRINT_INFO(NETVSC, "no net device to remove"); DPRINT_EXIT(NETVSC_DRV); return 0; } - if (!net_drv_obj->Base.OnDeviceRemove) - { + if (!net_drv_obj->Base.OnDeviceRemove) { DPRINT_EXIT(NETVSC_DRV); return -1; } @@ -274,56 +224,48 @@ static int netvsc_remove(struct device *device) unregister_netdev(net); - /* Call to the vsc driver to let it know that the device is being removed */ + /* + * Call to the vsc driver to let it know that the device is being + * removed + */ ret = net_drv_obj->Base.OnDeviceRemove(device_obj); - if (ret != 0) - { + if (ret != 0) { /* TODO: */ DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); } free_netdev(net); - DPRINT_EXIT(NETVSC_DRV); - return ret; } -/*++ - -Name: netvsc_open() - -Desc: Open the specified interface device - ---*/ static int netvsc_open(struct net_device *net) { - int ret=0; struct net_device_context *net_device_ctx = netdev_priv(net); - struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver); - struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; + struct driver_context *driver_ctx = + driver_to_driver_context(net_device_ctx->device_ctx->device.driver); + struct netvsc_driver_context *net_drv_ctx = + (struct netvsc_driver_context *)driver_ctx; struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; - struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; + int ret = 0; DPRINT_ENTER(NETVSC_DRV); - if (netif_carrier_ok(net)) - { - memset(&net_device_ctx->stats, 0 , sizeof(struct net_device_stats)); + if (netif_carrier_ok(net)) { + memset(&net_device_ctx->stats, 0, + sizeof(struct net_device_stats)); /* Open up the device */ ret = net_drv_obj->OnOpen(device_obj); - if (ret != 0) - { - DPRINT_ERR(NETVSC_DRV, "unable to open device (ret %d).", ret); + if (ret != 0) { + DPRINT_ERR(NETVSC_DRV, + "unable to open device (ret %d).", ret); return ret; } netif_start_queue(net); - } - else - { + } else { DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); } @@ -331,22 +273,16 @@ static int netvsc_open(struct net_device *net) return ret; } -/*++ - -Name: netvsc_close() - -Desc: Close the specified interface device - ---*/ static int netvsc_close(struct net_device *net) { - int ret=0; struct net_device_context *net_device_ctx = netdev_priv(net); - struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver); - struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; + struct driver_context *driver_ctx = + driver_to_driver_context(net_device_ctx->device_ctx->device.driver); + struct netvsc_driver_context *net_drv_ctx = + (struct netvsc_driver_context *)driver_ctx; struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; - struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; + int ret; DPRINT_ENTER(NETVSC_DRV); @@ -354,42 +290,31 @@ static int netvsc_close(struct net_device *net) ret = net_drv_obj->OnClose(device_obj); if (ret != 0) - { DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); - } DPRINT_EXIT(NETVSC_DRV); return ret; } - -/*++ - -Name: netvsc_xmit_completion() - -Desc: Send completion processing - ---*/ static void netvsc_xmit_completion(void *context) { struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; - struct sk_buff *skb = (struct sk_buff *)(unsigned long)packet->Completion.Send.SendCompletionTid; - struct net_device* net; + struct sk_buff *skb = (struct sk_buff *) + (unsigned long)packet->Completion.Send.SendCompletionTid; + struct net_device *net; DPRINT_ENTER(NETVSC_DRV); kfree(packet); - if (skb) - { + if (skb) { net = skb->dev; - dev_kfree_skb_any(skb); - if (netif_queue_stopped(net)) - { - DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", net); + if (netif_queue_stopped(net)) { + DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", + net); netif_wake_queue(net); } @@ -398,25 +323,19 @@ static void netvsc_xmit_completion(void *context) DPRINT_EXIT(NETVSC_DRV); } -/*++ - -Name: netvsc_start_xmit() - -Desc: Start a send - ---*/ -static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net) +static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) { - int ret=0; struct net_device_context *net_device_ctx = netdev_priv(net); - struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver); - struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; + struct driver_context *driver_ctx = + driver_to_driver_context(net_device_ctx->device_ctx->device.driver); + struct netvsc_driver_context *net_drv_ctx = + (struct netvsc_driver_context *)driver_ctx; struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; - - int i=0; struct hv_netvsc_packet *packet; + int i; + int ret; int num_frags; - int retries=0; + int retries = 0; DPRINT_ENTER(NETVSC_DRV); @@ -424,20 +343,25 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net) ASSERT(skb_shinfo(skb)->frag_list == NULL); ASSERT(skb->dev == net); - DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", skb->len, skb->data_len); + DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", + skb->len, skb->data_len); /* Add 1 for skb->data and any additional ones requested */ - num_frags = skb_shinfo(skb)->nr_frags + 1 + net_drv_obj->AdditionalRequestPageBufferCount; + num_frags = skb_shinfo(skb)->nr_frags + 1 + + net_drv_obj->AdditionalRequestPageBufferCount; /* Allocate a netvsc packet based on # of frags. */ - packet = kzalloc(sizeof(struct hv_netvsc_packet) + (num_frags * sizeof(struct hv_page_buffer)) + net_drv_obj->RequestExtSize, GFP_ATOMIC); - if (!packet) - { + packet = kzalloc(sizeof(struct hv_netvsc_packet) + + (num_frags * sizeof(struct hv_page_buffer)) + + net_drv_obj->RequestExtSize, GFP_ATOMIC); + if (!packet) { DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); return -1; } - packet->Extension = (void*)(unsigned long)packet + sizeof(struct hv_netvsc_packet) + (num_frags * sizeof(struct hv_page_buffer)) ; + packet->Extension = (void *)(unsigned long)packet + + sizeof(struct hv_netvsc_packet) + + (num_frags * sizeof(struct hv_page_buffer)); /* Setup the rndis header */ packet->PageBufferCount = num_frags; @@ -449,18 +373,24 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net) ASSERT(skb->data); packet->TotalDataBufferLength = skb->len; - /* Start filling in the page buffers starting at AdditionalRequestPageBufferCount offset */ - packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; - packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE -1); - packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; + /* + * Start filling in the page buffers starting at + * AdditionalRequestPageBufferCount offset + */ + packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; + packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1); + packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); - for (i=net_drv_obj->AdditionalRequestPageBufferCount+1; i<num_frags; i++) - { - packet->PageBuffers[i].Pfn = page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); - packet->PageBuffers[i].Offset = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; - packet->PageBuffers[i].Length = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; + for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1; + i < num_frags; i++) { + packet->PageBuffers[i].Pfn = + page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); + packet->PageBuffers[i].Offset = + skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; + packet->PageBuffers[i].Length = + skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; } /* Set the completion routine */ @@ -469,26 +399,25 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net) packet->Completion.Send.SendCompletionTid = (unsigned long)skb; retry_send: - ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, packet); + ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, + packet); - if (ret == 0) - { + if (ret == 0) { ret = NETDEV_TX_OK; net_device_ctx->stats.tx_bytes += skb->len; net_device_ctx->stats.tx_packets++; - } - else - { + } else { retries++; - if (retries < 4) - { - DPRINT_ERR(NETVSC_DRV, "unable to send...retrying %d...", retries); + if (retries < 4) { + DPRINT_ERR(NETVSC_DRV, "unable to send..." + "retrying %d...", retries); udelay(100); goto retry_send; } /* no more room or we are shutting down */ - DPRINT_ERR(NETVSC_DRV, "unable to send (%d)...marking net device (%p) busy", ret, net); + DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..." + "marking net device (%p) busy", ret, net); DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); ret = NETDEV_TX_BUSY; @@ -496,86 +425,82 @@ retry_send: netif_stop_queue(net); - /* Null it since the caller will free it instead of the completion routine */ + /* + * Null it since the caller will free it instead of the + * completion routine + */ packet->Completion.Send.SendCompletionTid = 0; - /* Release the resources since we will not get any send completion */ - netvsc_xmit_completion((void*)packet); + /* + * Release the resources since we will not get any send + * completion + */ + netvsc_xmit_completion((void *)packet); } - DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", net_device_ctx->stats.tx_packets, net_device_ctx->stats.tx_bytes); + DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", + net_device_ctx->stats.tx_packets, + net_device_ctx->stats.tx_bytes); DPRINT_EXIT(NETVSC_DRV); return ret; } - -/*++ - -Name: netvsc_linkstatus_callback() - -Desc: Link up/down notification - ---*/ -static void netvsc_linkstatus_callback(struct hv_device *device_obj, unsigned int status) +/** + * netvsc_linkstatus_callback - Link up/down notification + */ +static void netvsc_linkstatus_callback(struct hv_device *device_obj, + unsigned int status) { - struct device_context* device_ctx = to_device_context(device_obj); - struct net_device* net = dev_get_drvdata(&device_ctx->device); + struct device_context *device_ctx = to_device_context(device_obj); + struct net_device *net = dev_get_drvdata(&device_ctx->device); DPRINT_ENTER(NETVSC_DRV); - if (!net) - { - DPRINT_ERR(NETVSC_DRV, "got link status but net device not initialized yet"); + if (!net) { + DPRINT_ERR(NETVSC_DRV, "got link status but net device " + "not initialized yet"); return; } - if (status == 1) - { + if (status == 1) { netif_carrier_on(net); netif_wake_queue(net); - } - else - { + } else { netif_carrier_off(net); netif_stop_queue(net); } DPRINT_EXIT(NETVSC_DRV); } - -/*++ - -Name: netvsc_recv_callback() - -Desc: Callback when we receive a packet from the "wire" on the specify device - ---*/ -static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_packet *packet) +/** + * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device. + */ +static int netvsc_recv_callback(struct hv_device *device_obj, + struct hv_netvsc_packet *packet) { - int ret=0; struct device_context *device_ctx = to_device_context(device_obj); struct net_device *net = dev_get_drvdata(&device_ctx->device); struct net_device_context *net_device_ctx; - struct sk_buff *skb; void *data; - int i=0; + int ret; + int i; unsigned long flags; DPRINT_ENTER(NETVSC_DRV); - if (!net) - { - DPRINT_ERR(NETVSC_DRV, "got receive callback but net device not initialized yet"); + if (!net) { + DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " + "not initialized yet"); return 0; } net_device_ctx = netdev_priv(net); /* Allocate a skb - TODO preallocate this */ - /* skb = alloc_skb(packet->TotalDataBufferLength, GFP_ATOMIC); */ - skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); /* Pad 2-bytes to align IP header to 16 bytes */ + /* Pad 2-bytes to align IP header to 16 bytes */ + skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); ASSERT(skb); skb_reserve(skb, 2); skb->dev = net; @@ -583,16 +508,21 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p /* for kmap_atomic */ local_irq_save(flags); - /* Copy to skb. This copy is needed here since the memory pointed by hv_netvsc_packet */ - /* cannot be deallocated */ - for (i=0; i<packet->PageBufferCount; i++) - { - data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), KM_IRQ1); - data = (void*)(unsigned long)data + packet->PageBuffers[i].Offset; - - memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, packet->PageBuffers[i].Length); - - kunmap_atomic((void*)((unsigned long)data - packet->PageBuffers[i].Offset), KM_IRQ1); + /* + * Copy to skb. This copy is needed here since the memory pointed by + * hv_netvsc_packet cannot be deallocated + */ + for (i = 0; i < packet->PageBufferCount; i++) { + data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), + KM_IRQ1); + data = (void *)(unsigned long)data + + packet->PageBuffers[i].Offset; + + memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, + packet->PageBuffers[i].Length); + + kunmap_atomic((void *)((unsigned long)data - + packet->PageBuffers[i].Offset), KM_IRQ1); } local_irq_restore(flags); @@ -601,11 +531,13 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p skb->ip_summed = CHECKSUM_NONE; - /* Pass the skb back up. Network stack will deallocate the skb when it is done */ + /* + * Pass the skb back up. Network stack will deallocate the skb when it + * is done + */ ret = netif_rx(skb); - switch (ret) - { + switch (ret) { case NET_RX_DROP: net_device_ctx->stats.rx_dropped++; break; @@ -615,7 +547,9 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p break; } - DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", net_device_ctx->stats.rx_packets, net_device_ctx->stats.rx_bytes); + DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", + net_device_ctx->stats.rx_packets, + net_device_ctx->stats.rx_bytes); DPRINT_EXIT(NETVSC_DRV); @@ -625,45 +559,37 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p static int netvsc_drv_exit_cb(struct device *dev, void *data) { struct device **curr = (struct device **)data; + *curr = dev; - return 1; /* stop iterating */ + /* stop iterating */ + return 1; } -/*++ - -Name: netvsc_drv_exit() - -Desc: - ---*/ static void netvsc_drv_exit(void) { - struct netvsc_driver *netvsc_drv_obj=&g_netvsc_drv.drv_obj; - struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx; - struct device *current_dev=NULL; + struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; + struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; + struct device *current_dev; int ret; DPRINT_ENTER(NETVSC_DRV); - while (1) - { + while (1) { current_dev = NULL; /* Get the device */ ret = driver_for_each_device(&drv_ctx->driver, NULL, - (void *) ¤t_dev, - netvsc_drv_exit_cb); - + ¤t_dev, netvsc_drv_exit_cb); if (ret) DPRINT_WARN(NETVSC_DRV, "driver_for_each_device returned %d", ret); - if (current_dev == NULL) break; /* Initiate removal from the top-down */ - DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", current_dev); + DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", + current_dev); device_unregister(current_dev); } @@ -695,9 +621,7 @@ static int __init netvsc_init(void) static void __exit netvsc_exit(void) { DPRINT_ENTER(NETVSC_DRV); - netvsc_drv_exit(); - DPRINT_EXIT(NETVSC_DRV); } |