Merge tag 'drm-fixes-2020-10-09' of git://anongit.freedesktop.org/drm/drm

Pull amdgpu drm fixes from Dave Airlie:
 "Fixes trickling in this week.

  Alex had a final fix for the newest GPU they introduced in rc1, along
  with one build regression and one crasher fix.

  Cross my fingers that's it for 5.9:

   - Fix a crash on renoir if you override the IP discovery parameter

   - Fix the build on ARC platforms

   - Display fix for Sienna Cichlid"

* tag 'drm-fixes-2020-10-09' of git://anongit.freedesktop.org/drm/drm:
  drm/amd/display: Change ABM config init interface
  drm/amdgpu/swsmu: fix ARC build errors
  drm/amdgpu: fix NULL pointer dereference for Renoir

2 files changed, 24 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 3d5eae956a23..b1547a83e721 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -2265,8 +2265,6 @@ static void navi10_fill_i2c_req(SwI2cRequest_t  *req, bool write,
 {
 	int i;
 
-	BUG_ON(numbytes > MAX_SW_I2C_COMMANDS);
-
 	req->I2CcontrollerPort = 0;
 	req->I2CSpeed = 2;
 	req->SlaveAddress = address;
@@ -2304,6 +2302,12 @@ static int navi10_i2c_read_data(struct i2c_adapter *control,
 	struct smu_table_context *smu_table = &adev->smu.smu_table;
 	struct smu_table *table = &smu_table->driver_table;
 
+	if (numbytes > MAX_SW_I2C_COMMANDS) {
+		dev_err(adev->dev, "numbytes requested %d is over max allowed %d\n",
+			numbytes, MAX_SW_I2C_COMMANDS);
+		return -EINVAL;
+	}
+
 	memset(&req, 0, sizeof(req));
 	navi10_fill_i2c_req(&req, false, address, numbytes, data);
 
@@ -2340,6 +2344,12 @@ static int navi10_i2c_write_data(struct i2c_adapter *control,
 	SwI2cRequest_t req;
 	struct amdgpu_device *adev = to_amdgpu_device(control);
 
+	if (numbytes > MAX_SW_I2C_COMMANDS) {
+		dev_err(adev->dev, "numbytes requested %d is over max allowed %d\n",
+			numbytes, MAX_SW_I2C_COMMANDS);
+		return -EINVAL;
+	}
+
 	memset(&req, 0, sizeof(req));
 	navi10_fill_i2c_req(&req, true, address, numbytes, data);
 
diff --git a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
index 61f4ddae262d..ace682fde22f 100644
--- a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
@@ -2445,8 +2445,6 @@ static void sienna_cichlid_fill_i2c_req(SwI2cRequest_t  *req, bool write,
 {
 	int i;
 
-	BUG_ON(numbytes > MAX_SW_I2C_COMMANDS);
-
 	req->I2CcontrollerPort = 0;
 	req->I2CSpeed = 2;
 	req->SlaveAddress = address;
@@ -2484,6 +2482,12 @@ static int sienna_cichlid_i2c_read_data(struct i2c_adapter *control,
 	struct smu_table_context *smu_table = &adev->smu.smu_table;
 	struct smu_table *table = &smu_table->driver_table;
 
+	if (numbytes > MAX_SW_I2C_COMMANDS) {
+		dev_err(adev->dev, "numbytes requested %d is over max allowed %d\n",
+			numbytes, MAX_SW_I2C_COMMANDS);
+		return -EINVAL;
+	}
+
 	memset(&req, 0, sizeof(req));
 	sienna_cichlid_fill_i2c_req(&req, false, address, numbytes, data);
 
@@ -2520,6 +2524,12 @@ static int sienna_cichlid_i2c_write_data(struct i2c_adapter *control,
 	SwI2cRequest_t req;
 	struct amdgpu_device *adev = to_amdgpu_device(control);
 
+	if (numbytes > MAX_SW_I2C_COMMANDS) {
+		dev_err(adev->dev, "numbytes requested %d is over max allowed %d\n",
+			numbytes, MAX_SW_I2C_COMMANDS);
+		return -EINVAL;
+	}
+
 	memset(&req, 0, sizeof(req));
 	sienna_cichlid_fill_i2c_req(&req, true, address, numbytes, data);