[x/azure][PATCH 12/17] uio_hv_generic: make ring buffer attribute for primary channel
Marcelo Henrique Cerri
marcelo.cerri at canonical.com
Fri Jun 7 19:38:46 UTC 2019
From: Stephen Hemminger <stephen at networkplumber.org>
BugLink: http://bugs.launchpad.net/bugs/1812123
The primary channel also needs a ring buffer attribute. This allows
application to check if kernel supports uio sub channels, and also
makes all channels use consistent API.
Fixes: 37b96a4931db ("uio_hv_generic: support sub-channels")
Signed-off-by: Stephen Hemminger <sthemmin at microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
(cherry picked from commit 9ab877a6ccf820483d79602bede0c1aa1da4d26a)
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri at canonical.com>
---
drivers/uio/uio_hv_generic.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c
index ab7a60fc02e7..73ed0f201764 100644
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -294,6 +294,11 @@ hv_uio_probe(struct hv_device *dev,
vmbus_set_chn_rescind_callback(dev->channel, hv_uio_rescind);
vmbus_set_sc_create_callback(dev->channel, hv_uio_new_channel);
+ ret = sysfs_create_bin_file(&dev->channel->kobj, &ring_buffer_bin_attr);
+ if (ret)
+ dev_notice(&dev->device,
+ "sysfs create ring bin file failed; %d\n", ret);
+
hv_set_drvdata(dev, pdata);
return 0;
--
2.20.1
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