diff options
Diffstat (limited to 'drivers/hv/vmbus_drv.c')
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 82 |
1 files changed, 53 insertions, 29 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 6aa79b6a6750..aa25f3bcbdea 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1410,7 +1410,7 @@ static void vmbus_chan_release(struct kobject *kobj) struct vmbus_chan_attribute { struct attribute attr; - ssize_t (*show)(const struct vmbus_channel *chan, char *buf); + ssize_t (*show)(struct vmbus_channel *chan, char *buf); ssize_t (*store)(struct vmbus_channel *chan, const char *buf, size_t count); }; @@ -1429,7 +1429,7 @@ static ssize_t vmbus_chan_attr_show(struct kobject *kobj, { const struct vmbus_chan_attribute *attribute = container_of(attr, struct vmbus_chan_attribute, attr); - const struct vmbus_channel *chan + struct vmbus_channel *chan = container_of(kobj, struct vmbus_channel, kobj); if (!attribute->show) @@ -1442,57 +1442,81 @@ static const struct sysfs_ops vmbus_chan_sysfs_ops = { .show = vmbus_chan_attr_show, }; -static ssize_t out_mask_show(const struct vmbus_channel *channel, char *buf) +static ssize_t out_mask_show(struct vmbus_channel *channel, char *buf) { - const struct hv_ring_buffer_info *rbi = &channel->outbound; + struct hv_ring_buffer_info *rbi = &channel->outbound; + ssize_t ret; - if (!rbi->ring_buffer) + mutex_lock(&rbi->ring_buffer_mutex); + if (!rbi->ring_buffer) { + mutex_unlock(&rbi->ring_buffer_mutex); return -EINVAL; + } - return sprintf(buf, "%u\n", rbi->ring_buffer->interrupt_mask); + ret = sprintf(buf, "%u\n", rbi->ring_buffer->interrupt_mask); + mutex_unlock(&rbi->ring_buffer_mutex); + return ret; } static VMBUS_CHAN_ATTR_RO(out_mask); -static ssize_t in_mask_show(const struct vmbus_channel *channel, char *buf) +static ssize_t in_mask_show(struct vmbus_channel *channel, char *buf) { - const struct hv_ring_buffer_info *rbi = &channel->inbound; + struct hv_ring_buffer_info *rbi = &channel->inbound; + ssize_t ret; - if (!rbi->ring_buffer) + mutex_lock(&rbi->ring_buffer_mutex); + if (!rbi->ring_buffer) { + mutex_unlock(&rbi->ring_buffer_mutex); return -EINVAL; + } - return sprintf(buf, "%u\n", rbi->ring_buffer->interrupt_mask); + ret = sprintf(buf, "%u\n", rbi->ring_buffer->interrupt_mask); + mutex_unlock(&rbi->ring_buffer_mutex); + return ret; } static VMBUS_CHAN_ATTR_RO(in_mask); -static ssize_t read_avail_show(const struct vmbus_channel *channel, char *buf) +static ssize_t read_avail_show(struct vmbus_channel *channel, char *buf) { - const struct hv_ring_buffer_info *rbi = &channel->inbound; + struct hv_ring_buffer_info *rbi = &channel->inbound; + ssize_t ret; - if (!rbi->ring_buffer) + mutex_lock(&rbi->ring_buffer_mutex); + if (!rbi->ring_buffer) { + mutex_unlock(&rbi->ring_buffer_mutex); return -EINVAL; + } - return sprintf(buf, "%u\n", hv_get_bytes_to_read(rbi)); + ret = sprintf(buf, "%u\n", hv_get_bytes_to_read(rbi)); + mutex_unlock(&rbi->ring_buffer_mutex); + return ret; } static VMBUS_CHAN_ATTR_RO(read_avail); -static ssize_t write_avail_show(const struct vmbus_channel *channel, char *buf) +static ssize_t write_avail_show(struct vmbus_channel *channel, char *buf) { - const struct hv_ring_buffer_info *rbi = &channel->outbound; + struct hv_ring_buffer_info *rbi = &channel->outbound; + ssize_t ret; - if (!rbi->ring_buffer) + mutex_lock(&rbi->ring_buffer_mutex); + if (!rbi->ring_buffer) { + mutex_unlock(&rbi->ring_buffer_mutex); return -EINVAL; + } - return sprintf(buf, "%u\n", hv_get_bytes_to_write(rbi)); + ret = sprintf(buf, "%u\n", hv_get_bytes_to_write(rbi)); + mutex_unlock(&rbi->ring_buffer_mutex); + return ret; } static VMBUS_CHAN_ATTR_RO(write_avail); -static ssize_t show_target_cpu(const struct vmbus_channel *channel, char *buf) +static ssize_t show_target_cpu(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%u\n", channel->target_cpu); } static VMBUS_CHAN_ATTR(cpu, S_IRUGO, show_target_cpu, NULL); -static ssize_t channel_pending_show(const struct vmbus_channel *channel, +static ssize_t channel_pending_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%d\n", @@ -1501,7 +1525,7 @@ static ssize_t channel_pending_show(const struct vmbus_channel *channel, } static VMBUS_CHAN_ATTR(pending, S_IRUGO, channel_pending_show, NULL); -static ssize_t channel_latency_show(const struct vmbus_channel *channel, +static ssize_t channel_latency_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%d\n", @@ -1510,19 +1534,19 @@ static ssize_t channel_latency_show(const struct vmbus_channel *channel, } static VMBUS_CHAN_ATTR(latency, S_IRUGO, channel_latency_show, NULL); -static ssize_t channel_interrupts_show(const struct vmbus_channel *channel, char *buf) +static ssize_t channel_interrupts_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%llu\n", channel->interrupts); } static VMBUS_CHAN_ATTR(interrupts, S_IRUGO, channel_interrupts_show, NULL); -static ssize_t channel_events_show(const struct vmbus_channel *channel, char *buf) +static ssize_t channel_events_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%llu\n", channel->sig_events); } static VMBUS_CHAN_ATTR(events, S_IRUGO, channel_events_show, NULL); -static ssize_t channel_intr_in_full_show(const struct vmbus_channel *channel, +static ssize_t channel_intr_in_full_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%llu\n", @@ -1530,7 +1554,7 @@ static ssize_t channel_intr_in_full_show(const struct vmbus_channel *channel, } static VMBUS_CHAN_ATTR(intr_in_full, 0444, channel_intr_in_full_show, NULL); -static ssize_t channel_intr_out_empty_show(const struct vmbus_channel *channel, +static ssize_t channel_intr_out_empty_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%llu\n", @@ -1538,7 +1562,7 @@ static ssize_t channel_intr_out_empty_show(const struct vmbus_channel *channel, } static VMBUS_CHAN_ATTR(intr_out_empty, 0444, channel_intr_out_empty_show, NULL); -static ssize_t channel_out_full_first_show(const struct vmbus_channel *channel, +static ssize_t channel_out_full_first_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%llu\n", @@ -1546,7 +1570,7 @@ static ssize_t channel_out_full_first_show(const struct vmbus_channel *channel, } static VMBUS_CHAN_ATTR(out_full_first, 0444, channel_out_full_first_show, NULL); -static ssize_t channel_out_full_total_show(const struct vmbus_channel *channel, +static ssize_t channel_out_full_total_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%llu\n", @@ -1554,14 +1578,14 @@ static ssize_t channel_out_full_total_show(const struct vmbus_channel *channel, } static VMBUS_CHAN_ATTR(out_full_total, 0444, channel_out_full_total_show, NULL); -static ssize_t subchannel_monitor_id_show(const struct vmbus_channel *channel, +static ssize_t subchannel_monitor_id_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%u\n", channel->offermsg.monitorid); } static VMBUS_CHAN_ATTR(monitor_id, S_IRUGO, subchannel_monitor_id_show, NULL); -static ssize_t subchannel_id_show(const struct vmbus_channel *channel, +static ssize_t subchannel_id_show(struct vmbus_channel *channel, char *buf) { return sprintf(buf, "%u\n", |