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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-12 14:12:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-12 14:12:04 -0700 |
| commit | 56a50f20eade9a1777375d40e04434788b6ff414 (patch) | |
| tree | b346e7e5bb5b805d46658f969d7f748bb70add14 /drivers | |
| parent | 303f8ad1c5f4bed903a62f4afdbd2b252e2a1270 (diff) | |
| parent | 6d827fbcc370ca259a2905309f64161ab7b10596 (diff) | |
Merge tag 'char-misc-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are two hyperv driver fixes, and one i8k driver fix for 3.16"
* tag 'char-misc-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
i8k: Fix non-SMP operation
Drivers: hv: util: Fix a bug in the KVP code
Drivers: hv: vmbus: Fix a bug in the channel callback dispatch code
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/i8k.c | 4 | ||||
| -rw-r--r-- | drivers/hv/connection.c | 8 | ||||
| -rw-r--r-- | drivers/hv/hv_kvp.c | 17 | ||||
| -rw-r--r-- | drivers/hv/hv_util.c | 2 |
4 files changed, 24 insertions, 7 deletions
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c index d915707d2ba1..93dcad0c1cbe 100644 --- a/drivers/char/i8k.c +++ b/drivers/char/i8k.c @@ -138,7 +138,9 @@ static int i8k_smm(struct smm_regs *regs) if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) return -ENOMEM; cpumask_copy(old_mask, ¤t->cpus_allowed); - set_cpus_allowed_ptr(current, cpumask_of(0)); + rc = set_cpus_allowed_ptr(current, cpumask_of(0)); + if (rc) + goto out; if (smp_processor_id() != 0) { rc = -EBUSY; goto out; diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index e84f4526eb36..ae22e3c1fc4c 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -339,9 +339,13 @@ static void process_chn_event(u32 relid) */ do { - hv_begin_read(&channel->inbound); + if (read_state) + hv_begin_read(&channel->inbound); channel->onchannel_callback(arg); - bytes_to_read = hv_end_read(&channel->inbound); + if (read_state) + bytes_to_read = hv_end_read(&channel->inbound); + else + bytes_to_read = 0; } while (read_state && (bytes_to_read != 0)); } else { pr_err("no channel callback for relid - %u\n", relid); diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c index ea852537307e..521c14625b3a 100644 --- a/drivers/hv/hv_kvp.c +++ b/drivers/hv/hv_kvp.c @@ -127,6 +127,17 @@ kvp_work_func(struct work_struct *dummy) kvp_respond_to_host(NULL, HV_E_FAIL); } +static void poll_channel(struct vmbus_channel *channel) +{ + if (channel->target_cpu != smp_processor_id()) + smp_call_function_single(channel->target_cpu, + hv_kvp_onchannelcallback, + channel, true); + else + hv_kvp_onchannelcallback(channel); +} + + static int kvp_handle_handshake(struct hv_kvp_msg *msg) { int ret = 1; @@ -155,7 +166,7 @@ static int kvp_handle_handshake(struct hv_kvp_msg *msg) kvp_register(dm_reg_value); kvp_transaction.active = false; if (kvp_transaction.kvp_context) - hv_kvp_onchannelcallback(kvp_transaction.kvp_context); + poll_channel(kvp_transaction.kvp_context); } return ret; } @@ -568,7 +579,7 @@ response_done: vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, VM_PKT_DATA_INBAND, 0); - + poll_channel(channel); } /* @@ -603,7 +614,7 @@ void hv_kvp_onchannelcallback(void *context) return; } - vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 2, &recvlen, + vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 4, &recvlen, &requestid); if (recvlen > 0) { diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index dd761806f0e8..3b9c9ef0deb8 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -319,7 +319,7 @@ static int util_probe(struct hv_device *dev, (struct hv_util_service *)dev_id->driver_data; int ret; - srv->recv_buffer = kmalloc(PAGE_SIZE * 2, GFP_KERNEL); + srv->recv_buffer = kmalloc(PAGE_SIZE * 4, GFP_KERNEL); if (!srv->recv_buffer) return -ENOMEM; if (srv->util_init) { |