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authorK. Y. Srinivasan <kys@microsoft.com>2016-11-06 13:14:18 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-07 10:01:18 +0100
commit3372592a140db69fd63837e81f048ab4abf8111e (patch)
treee98a51a7fcedba1a35564466daf3a59bc0af80b0 /drivers/hv/ring_buffer.c
parent1f6ee4e7d83586c8b10bd4f2f4346353d04ce884 (diff)
downloadlinux-3372592a140db69fd63837e81f048ab4abf8111e.tar.bz2
Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host
Signal the host when we determine the host is to be signaled - on th read path. The currrent code determines the need to signal in the ringbuffer code and actually issues the signal elsewhere. This can result in the host viewing this interrupt as spurious since the host may also poll the channel. Make the necessary adjustments. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/ring_buffer.c')
-rw-r--r--drivers/hv/ring_buffer.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index 4af71306d0ff..cd49cb17eb7f 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -353,9 +353,9 @@ int hv_ringbuffer_write(struct vmbus_channel *channel,
return 0;
}
-int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info,
+int hv_ringbuffer_read(struct vmbus_channel *channel,
void *buffer, u32 buflen, u32 *buffer_actual_len,
- u64 *requestid, bool *signal, bool raw)
+ u64 *requestid, bool raw)
{
u32 bytes_avail_toread;
u32 next_read_location = 0;
@@ -364,6 +364,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info,
u32 offset;
u32 packetlen;
int ret = 0;
+ struct hv_ring_buffer_info *inring_info = &channel->inbound;
if (buflen <= 0)
return -EINVAL;
@@ -421,7 +422,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info,
/* Update the read index */
hv_set_next_read_location(inring_info, next_read_location);
- *signal = hv_need_to_signal_on_read(inring_info);
+ hv_signal_on_read(channel);
return ret;
}