[PATCH v2 2/2] drm/amdgpu: Fix the uninitialized variable warning

[Ma Jun]

Initialize the phy_id to 0 to fix the warning of
"Using uninitialized value phy_id"

Signed-off-by: Ma Jun <Jun.Ma2 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
index 8ed0e073656f..53d85fafd8ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
@@ -95,7 +95,7 @@ static ssize_t amdgpu_securedisplay_debugfs_write(struct file *f, const char __u
 	struct psp_context *psp = &adev->psp;
 	struct ta_securedisplay_cmd *securedisplay_cmd;
 	struct drm_device *dev = adev_to_drm(adev);
-	uint32_t phy_id;
+	uint32_t phy_id = 0;
 	uint32_t op;
 	char str[64];
 	int ret;
@@ -135,6 +135,10 @@ static ssize_t amdgpu_securedisplay_debugfs_write(struct file *f, const char __u
 		mutex_unlock(&psp->securedisplay_context.mutex);
 		break;
 	case 2:
+		if (size < 3) {
+			dev_err(adev->dev, "Invalid input: %s\n", str);
+			return -EINVAL;
+		}
 		mutex_lock(&psp->securedisplay_context.mutex);
 		psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
 			TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
-- 
2.34.1