From 780073d7c4c001f78a5b3cd2d464ddd2f15c44e0 Mon Sep 17 00:00:00 2001 From: Peter Zu Date: Wed, 6 Apr 2011 21:42:33 -0700 Subject: [PATCH] video: tegra: dc: hdcp: handle the case of DEVICE_COUNT = 0 properly When HDCP repeater has no device attached, DEVICE_COUNT reports back as 0. HDCP driver should handle this case as a good case and continue downstream authentication, other than fail it. Change-Id: Ied2e46428c0247f14fbd96016cd4fdbf358f6587 --- drivers/video/tegra/dc/nvhdcp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/video/tegra/dc/nvhdcp.c b/drivers/video/tegra/dc/nvhdcp.c index 7c8869a563f5..5c2d9050a14b 100644 --- a/drivers/video/tegra/dc/nvhdcp.c +++ b/drivers/video/tegra/dc/nvhdcp.c @@ -354,6 +354,9 @@ static int get_ksvfifo(struct tegra_nvhdcp *nvhdcp, if (!ksv_list || num_bksv_list > TEGRA_NVHDCP_MAX_DEVS) return -EINVAL; + if (num_bksv_list == 0) + return 0; + buf = kmalloc(buf_len, GFP_KERNEL); if (IS_ERR_OR_NULL(buf)) return -ENOMEM; -- 2.34.1