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uio_hv_generic: set size of ring buffer attribute 

The original code had ring size as a module parameter, but
then it was made a fixed value.  The code to set the size of
the ring buffer binary file was lost in the transistion.
The size is needed by user mode driver to know the size of
the ring buffer.

Fixes: 37b96a4931 ("uio_hv_generic: support sub-channels")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hemminger 2018-04-16 11:19:24 -07:00 committed by Greg Kroah-Hartman
parent 7aa135fcf2
commit 6e3d66b80f
1 changed files with 2 additions and 2 deletions
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4
drivers/uio/uio_hv_generic.c
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@ -171,12 +171,12 @@ static int hv_uio_ring_mmap(struct file *filp, struct kobject *kobj,
return 0;
}
static struct bin_attribute ring_buffer_bin_attr __ro_after_init = {
static const struct bin_attribute ring_buffer_bin_attr = {
.attr = {
.name = "ring",
.mode = 0600,
/* size is set at init time */
},
.size = 2 * HV_RING_SIZE * PAGE_SIZE,
.mmap = hv_uio_ring_mmap,
};