clover: return CL_INVALID_PLATFORM properly.

If the platform isn't clover platform return an error,

Fixes CTS api negative_get_platform_info

Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12225>

src/gallium/frontends/clover/api/context.cpp

@@ -40,7 +40,7 @@ clCreateContext(const cl_context_properties *d_props, cl_uint num_devs,
 
    for (auto &prop : props) {
       if (prop.first == CL_CONTEXT_PLATFORM)
-         obj(prop.second.as<cl_platform_id>());
+         find_platform(prop.second.as<cl_platform_id>());
       else
          throw error(CL_INVALID_PROPERTY);
    }

src/gallium/frontends/clover/api/platform.cpp

@@ -49,12 +49,20 @@ clGetPlatformIDs(cl_uint num_entries, cl_platform_id *rd_platforms,
    return CL_SUCCESS;
 }
 
+platform &clover::find_platform(cl_platform_id d_platform)
+{
+   /* this error is only added in CL2.0 */
+   if (d_platform != desc(_clover_platform))
+      throw error(CL_INVALID_PLATFORM);
+   return obj(d_platform);
+}
+
 cl_int
 clover::GetPlatformInfo(cl_platform_id d_platform, cl_platform_info param,
                         size_t size, void *r_buf, size_t *r_size) try {
    property_buffer buf { r_buf, size, r_size };
 
-   auto &platform = obj(d_platform);
+   auto &platform = find_platform(d_platform);
 
    switch (param) {
    case CL_PLATFORM_PROFILE:

src/gallium/frontends/clover/api/program.cpp

@@ -22,6 +22,7 @@
 
 #include "api/util.hpp"
 #include "core/program.hpp"
+#include "core/platform.hpp"
 #include "spirv/invocation.hpp"
 #include "util/u_debug.h"
 
@@ -466,8 +467,11 @@ clUnloadCompiler() {
 }
 
 CLOVER_API cl_int
-clUnloadPlatformCompiler(cl_platform_id d_platform) {
+clUnloadPlatformCompiler(cl_platform_id d_platform) try {
+   find_platform(d_platform);
    return CL_SUCCESS;
+} catch (error &e) {
+   return e.get();
 }
 
 CLOVER_API cl_int

src/gallium/frontends/clover/core/platform.hpp

@@ -50,6 +50,8 @@ namespace clover {
       cl_version version;
       std::vector<intrusive_ref<device>> devs;
    };
+
+   platform &find_platform(cl_platform_id d_platform);
 }
 
 #endif