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path: root/drivers/hv/vmbus_drv.c
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Diffstat (limited to 'drivers/hv/vmbus_drv.c')
-rw-r--r--drivers/hv/vmbus_drv.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index b23aea86d029..6aa79b6a6750 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1435,9 +1435,6 @@ static ssize_t vmbus_chan_attr_show(struct kobject *kobj,
if (!attribute->show)
return -EIO;
- if (chan->state != CHANNEL_OPENED_STATE)
- return -EINVAL;
-
return attribute->show(chan, buf);
}
@@ -1449,6 +1446,9 @@ static ssize_t out_mask_show(const struct vmbus_channel *channel, char *buf)
{
const struct hv_ring_buffer_info *rbi = &channel->outbound;
+ if (!rbi->ring_buffer)
+ return -EINVAL;
+
return sprintf(buf, "%u\n", rbi->ring_buffer->interrupt_mask);
}
static VMBUS_CHAN_ATTR_RO(out_mask);
@@ -1457,6 +1457,9 @@ static ssize_t in_mask_show(const struct vmbus_channel *channel, char *buf)
{
const struct hv_ring_buffer_info *rbi = &channel->inbound;
+ if (!rbi->ring_buffer)
+ return -EINVAL;
+
return sprintf(buf, "%u\n", rbi->ring_buffer->interrupt_mask);
}
static VMBUS_CHAN_ATTR_RO(in_mask);
@@ -1465,6 +1468,9 @@ static ssize_t read_avail_show(const struct vmbus_channel *channel, char *buf)
{
const struct hv_ring_buffer_info *rbi = &channel->inbound;
+ if (!rbi->ring_buffer)
+ return -EINVAL;
+
return sprintf(buf, "%u\n", hv_get_bytes_to_read(rbi));
}
static VMBUS_CHAN_ATTR_RO(read_avail);
@@ -1473,6 +1479,9 @@ static ssize_t write_avail_show(const struct vmbus_channel *channel, char *buf)
{
const struct hv_ring_buffer_info *rbi = &channel->outbound;
+ if (!rbi->ring_buffer)
+ return -EINVAL;
+
return sprintf(buf, "%u\n", hv_get_bytes_to_write(rbi));
}
static VMBUS_CHAN_ATTR_RO(write_avail);