[Bug 65761] HD 7970M Hybrid - hangs and errors and rmmod causes crash

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=65761

--- Comment #43 from Christoph Haag <haagch.christoph at googlemail.com> ---
But it silently breaks opencl.

Before the patch:

opencl-example (git)-[master] % sudo ./hello_world
./hello_world: /usr/lib/libOpenCL.so.1: no version information available
(required by ./hello_world)
There are 1 platforms.
There are 1 GPU devices.
clCreateContext() succeeded.
clCreateCommandQueue() succeeded.
clCreateProgramWithSource() suceeded.
clBuildProgram() suceeded.
clCreateKernel() suceeded.
clCreateBuffer() succeeded.
clSetKernelArg() succeeded.
clEnqueueNDRangeKernel() suceeded.
clFinish() succeeded.
clEnqueueReadBuffer() suceeded.
pi = 3.141590

After the patch:

opencl-example (git)-[master] % sudo ./hello_world
./hello_world: /usr/lib/libOpenCL.so.1: no version information available
(required by ./hello_world)
There are 1 platforms.
There are 1 GPU devices.
clCreateContext() succeeded.
clCreateCommandQueue() succeeded.
clCreateProgramWithSource() suceeded.
clBuildProgram() suceeded.
clCreateKernel() suceeded.
clCreateBuffer() succeeded.
clSetKernelArg() succeeded.
clEnqueueNDRangeKernel() suceeded.
clFinish() succeeded.
clEnqueueReadBuffer() suceeded.
pi = -nan

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