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Merge 4.11-rc4 into char-misc-next

Browse source 
We want the char-misc fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Greg Kroah-Hartman 2017-03-27 09:13:04 +02:00
commit 57c0eabbd5
727 changed files with 9277 additions and 5625 deletions
Download patch file Download diff file Expand all files Collapse all files

25
drivers/hv/channel.c
View file

@ -502,12 +502,15 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
wait_for_completion(&info->waitevent);
if (channel->rescind) {
ret = -ENODEV;
goto post_msg_err;
}
post_msg_err:
/*
* If the channel has been rescinded;
* we will be awakened by the rescind
* handler; set the error code to zero so we don't leak memory.
*/
if (channel->rescind)
ret = 0;
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_del(&info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
@ -530,15 +533,13 @@ static int vmbus_close_internal(struct vmbus_channel *channel)
int ret;
/*
* vmbus_on_event(), running in the tasklet, can race
* vmbus_on_event(), running in the per-channel tasklet, can race
* with vmbus_close_internal() in the case of SMP guest, e.g., when
* the former is accessing channel->inbound.ring_buffer, the latter
* could be freeing the ring_buffer pages.
*
* To resolve the race, we can serialize them by disabling the
* tasklet when the latter is running here.
* could be freeing the ring_buffer pages, so here we must stop it
* first.
*/
hv_event_tasklet_disable(channel);
tasklet_disable(&channel->callback_event);
/*
* In case a device driver's probe() fails (e.g.,
@ -605,8 +606,6 @@ static int vmbus_close_internal(struct vmbus_channel *channel)
get_order(channel->ringbuffer_pagecount * PAGE_SIZE));
out:
hv_event_tasklet_enable(channel);
return ret;
}

27
drivers/hv/channel_mgmt.c
View file

@ -350,7 +350,8 @@ static struct vmbus_channel *alloc_channel(void)
static void free_channel(struct vmbus_channel *channel)
{
tasklet_kill(&channel->callback_event);
kfree(channel);
kfree_rcu(channel, rcu);
}
static void percpu_channel_enq(void *arg)
@ -359,14 +360,14 @@ static void percpu_channel_enq(void *arg)
struct hv_per_cpu_context *hv_cpu
= this_cpu_ptr(hv_context.cpu_context);
list_add_tail(&channel->percpu_list, &hv_cpu->chan_list);
list_add_tail_rcu(&channel->percpu_list, &hv_cpu->chan_list);
}
static void percpu_channel_deq(void *arg)
{
struct vmbus_channel *channel = arg;
list_del(&channel->percpu_list);
list_del_rcu(&channel->percpu_list);
}
@ -381,19 +382,6 @@ static void vmbus_release_relid(u32 relid)
true);
}
void hv_event_tasklet_disable(struct vmbus_channel *channel)
{
tasklet_disable(&channel->callback_event);
}
void hv_event_tasklet_enable(struct vmbus_channel *channel)
{
tasklet_enable(&channel->callback_event);
/* In case there is any pending event */
tasklet_schedule(&channel->callback_event);
}
void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
{
unsigned long flags;
@ -402,7 +390,6 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
BUG_ON(!channel->rescind);
BUG_ON(!mutex_is_locked(&vmbus_connection.channel_mutex));
hv_event_tasklet_disable(channel);
if (channel->target_cpu != get_cpu()) {
put_cpu();
smp_call_function_single(channel->target_cpu,
@ -411,7 +398,6 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
percpu_channel_deq(channel);
put_cpu();
}
hv_event_tasklet_enable(channel);
if (channel->primary_channel == NULL) {
list_del(&channel->listentry);
@ -505,7 +491,6 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
init_vp_index(newchannel, dev_type);
hv_event_tasklet_disable(newchannel);
if (newchannel->target_cpu != get_cpu()) {
put_cpu();
smp_call_function_single(newchannel->target_cpu,
@ -515,7 +500,6 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
percpu_channel_enq(newchannel);
put_cpu();
}
hv_event_tasklet_enable(newchannel);
/*
* This state is used to indicate a successful open
@ -565,7 +549,6 @@ err_deq_chan:
list_del(&newchannel->listentry);
mutex_unlock(&vmbus_connection.channel_mutex);
hv_event_tasklet_disable(newchannel);
if (newchannel->target_cpu != get_cpu()) {
put_cpu();
smp_call_function_single(newchannel->target_cpu,
@ -574,7 +557,6 @@ err_deq_chan:
percpu_channel_deq(newchannel);
put_cpu();
}
hv_event_tasklet_enable(newchannel);
vmbus_release_relid(newchannel->offermsg.child_relid);
@ -814,6 +796,7 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr)
/* Allocate the channel object and save this offer. */
newchannel = alloc_channel();
if (!newchannel) {
vmbus_release_relid(offer->child_relid);
pr_err("Unable to allocate channel object\n");
return;
}

4
drivers/hv/hv_fcopy.c
View file

@ -71,7 +71,6 @@ static DECLARE_WORK(fcopy_send_work, fcopy_send_data);
static const char fcopy_devname[] = "vmbus/hv_fcopy";
static u8 *recv_buffer;
static struct hvutil_transport *hvt;
static struct completion release_event;
/*
* This state maintains the version number registered by the daemon.
*/
@ -329,7 +328,6 @@ static void fcopy_on_reset(void)
if (cancel_delayed_work_sync(&fcopy_timeout_work))
fcopy_respond_to_host(HV_E_FAIL);
complete(&release_event);
}
int hv_fcopy_init(struct hv_util_service *srv)
@ -337,7 +335,6 @@ int hv_fcopy_init(struct hv_util_service *srv)
recv_buffer = srv->recv_buffer;
fcopy_transaction.recv_channel = srv->channel;
init_completion(&release_event);
/*
* When this driver loads, the user level daemon that
* processes the host requests may not yet be running.
@ -359,5 +356,4 @@ void hv_fcopy_deinit(void)
fcopy_transaction.state = HVUTIL_DEVICE_DYING;
cancel_delayed_work_sync(&fcopy_timeout_work);
hvutil_transport_destroy(hvt);
wait_for_completion(&release_event);
}

4
drivers/hv/hv_kvp.c
View file

@ -101,7 +101,6 @@ static DECLARE_WORK(kvp_sendkey_work, kvp_send_key);
static const char kvp_devname[] = "vmbus/hv_kvp";
static u8 *recv_buffer;
static struct hvutil_transport *hvt;
static struct completion release_event;
/*
* Register the kernel component with the user-level daemon.
* As part of this registration, pass the LIC version number.
@ -712,7 +711,6 @@ static void kvp_on_reset(void)
if (cancel_delayed_work_sync(&kvp_timeout_work))
kvp_respond_to_host(NULL, HV_E_FAIL);
kvp_transaction.state = HVUTIL_DEVICE_INIT;
complete(&release_event);
}
int
@ -721,7 +719,6 @@ hv_kvp_init(struct hv_util_service *srv)
recv_buffer = srv->recv_buffer;
kvp_transaction.recv_channel = srv->channel;
init_completion(&release_event);
/*
* When this driver loads, the user level daemon that
* processes the host requests may not yet be running.
@ -745,5 +742,4 @@ void hv_kvp_deinit(void)
cancel_delayed_work_sync(&kvp_timeout_work);
cancel_work_sync(&kvp_sendkey_work);
hvutil_transport_destroy(hvt);
wait_for_completion(&release_event);
}

4
drivers/hv/hv_snapshot.c
View file

@ -79,7 +79,6 @@ static int dm_reg_value;
static const char vss_devname[] = "vmbus/hv_vss";
static __u8 *recv_buffer;
static struct hvutil_transport *hvt;
static struct completion release_event;
static void vss_timeout_func(struct work_struct *dummy);
static void vss_handle_request(struct work_struct *dummy);
@ -359,13 +358,11 @@ static void vss_on_reset(void)
if (cancel_delayed_work_sync(&vss_timeout_work))
vss_respond_to_host(HV_E_FAIL);
vss_transaction.state = HVUTIL_DEVICE_INIT;
complete(&release_event);
}
int
hv_vss_init(struct hv_util_service *srv)
{
init_completion(&release_event);
if (vmbus_proto_version < VERSION_WIN8_1) {
pr_warn("Integration service 'Backup (volume snapshot)'"
" not supported on this host version.\n");
@ -398,5 +395,4 @@ void hv_vss_deinit(void)
cancel_delayed_work_sync(&vss_timeout_work);
cancel_work_sync(&vss_handle_request_work);
hvutil_transport_destroy(hvt);
wait_for_completion(&release_event);
}

2
drivers/hv/hv_util.c
View file

@ -590,6 +590,8 @@ static int hv_timesync_init(struct hv_util_service *srv)
if (!hyperv_cs)
return -ENODEV;
spin_lock_init(&host_ts.lock);
INIT_WORK(&wrk.work, hv_set_host_time);
/*

12
drivers/hv/hv_utils_transport.c
View file

@ -182,10 +182,11 @@ static int hvt_op_release(struct inode *inode, struct file *file)
* connects back.
*/
hvt_reset(hvt);
mutex_unlock(&hvt->lock);
if (mode_old == HVUTIL_TRANSPORT_DESTROY)
hvt_transport_free(hvt);
complete(&hvt->release);
mutex_unlock(&hvt->lock);
return 0;
}
@ -304,6 +305,7 @@ struct hvutil_transport *hvutil_transport_init(const char *name,
init_waitqueue_head(&hvt->outmsg_q);
mutex_init(&hvt->lock);
init_completion(&hvt->release);
spin_lock(&hvt_list_lock);
list_add(&hvt->list, &hvt_list);
@ -351,6 +353,8 @@ void hvutil_transport_destroy(struct hvutil_transport *hvt)
if (hvt->cn_id.idx > 0 && hvt->cn_id.val > 0)
cn_del_callback(&hvt->cn_id);
if (mode_old != HVUTIL_TRANSPORT_CHARDEV)
hvt_transport_free(hvt);
if (mode_old == HVUTIL_TRANSPORT_CHARDEV)
wait_for_completion(&hvt->release);
hvt_transport_free(hvt);
}

1
drivers/hv/hv_utils_transport.h
View file

@ -41,6 +41,7 @@ struct hvutil_transport {
int outmsg_len; /* its length */
wait_queue_head_t outmsg_q; /* poll/read wait queue */
struct mutex lock; /* protects struct members */
struct completion release; /* synchronize with fd release */
};
struct hvutil_transport *hvutil_transport_init(const char *name,

6
drivers/hv/vmbus_drv.c
View file

@ -937,8 +937,10 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu)
if (relid == 0)
continue;
rcu_read_lock();
/* Find channel based on relid */
list_for_each_entry(channel, &hv_cpu->chan_list, percpu_list) {
list_for_each_entry_rcu(channel, &hv_cpu->chan_list, percpu_list) {
if (channel->offermsg.child_relid != relid)
continue;
@ -954,6 +956,8 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu)
tasklet_schedule(&channel->callback_event);
}
}
rcu_read_unlock();
}
}