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-rw-r--r--drivers/hv/ring_buffer.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index 490e9ea098e6..87799e81af97 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -112,7 +112,8 @@ hv_get_next_readlocation_withoffset(const struct hv_ring_buffer_info *ring_info,
u32 next = ring_info->ring_buffer->read_index;
next += offset;
- next %= ring_info->ring_datasize;
+ if (next >= ring_info->ring_datasize)
+ next -= ring_info->ring_datasize;
return next;
}
@@ -156,7 +157,8 @@ static u32 hv_copyfrom_ringbuffer(
memcpy(dest, ring_buffer + start_read_offset, destlen);
start_read_offset += destlen;
- start_read_offset %= ring_buffer_size;
+ if (start_read_offset >= ring_buffer_size)
+ start_read_offset -= ring_buffer_size;
return start_read_offset;
}
@@ -178,7 +180,8 @@ static u32 hv_copyto_ringbuffer(
memcpy(ring_buffer + start_write_offset, src, srclen);
start_write_offset += srclen;
- start_write_offset %= ring_buffer_size;
+ if (start_write_offset >= ring_buffer_size)
+ start_write_offset -= ring_buffer_size;
return start_write_offset;
}