Conflicting entries of cl_kernel may have been causing problems, and automatically chosen kernel type was not being passed on. Rename the enum to cl_kernels and store the chosen kernel in each clState.

cgminer.c

@@ -205,7 +205,7 @@ static bool config_loaded = false;
 	static char *opt_stderr_cmd = NULL;
 #endif // defined(unix)
 
-enum cl_kernel chosen_kernel;
+enum cl_kernels chosen_kernel;
 
 bool ping = true;
 

device-gpu.c

@@ -1078,8 +1078,9 @@ static bool opencl_thread_init(struct thr_info *thr)
 {
 	const int thr_id = thr->id;
 	struct cgpu_info *gpu = thr->cgpu;
-
 	struct opencl_thread_data *thrdata;
+	_clState *clState = clStates[thr_id];
+	cl_int status;
 	thrdata = calloc(1, sizeof(*thrdata));
 	thr->cgpu_data = thrdata;
 
@@ -1088,7 +1089,7 @@ static bool opencl_thread_init(struct thr_info *thr)
 		return false;
 	}
 
-	switch (chosen_kernel) {
+	switch (clState->chosen_kernel) {
 		case KL_POCLBM:
 			thrdata->queue_kernel_parameters = &queue_poclbm_kernel;
 			break;
@@ -1109,9 +1110,6 @@ static bool opencl_thread_init(struct thr_info *thr)
 		return false;
 	}
 
-	_clState *clState = clStates[thr_id];
-	cl_int status;
-
 	status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
 			BUFFERSIZE, blank_res, 0, NULL, NULL);
 	if (unlikely(status != CL_SUCCESS)) {

miner.h

@@ -675,7 +675,7 @@ struct work {
 	UT_hash_handle hh;
 };
 
-enum cl_kernel {
+enum cl_kernels {
 	KL_NONE,
 	KL_POCLBM,
 	KL_PHATK,
@@ -701,7 +701,7 @@ extern void *tq_pop(struct thread_q *tq, const struct timespec *abstime);
 extern void tq_freeze(struct thread_q *tq);
 extern void tq_thaw(struct thread_q *tq);
 extern bool successful_connect;
-extern enum cl_kernel chosen_kernel;
+extern enum cl_kernels chosen_kernel;
 extern void adl(void);
 
 #endif /* __MINER_H__ */

ocl.c

@@ -356,22 +356,21 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
 	 * have otherwise created. The filename is:
 	 * name + kernelname +/i bitalign + v + vectors + w + work_size + sizeof(long) + .bin
 	 */
-	enum cl_kernel this_kernel;
 	char binaryfilename[255];
 	char filename[255];
 	char numbuf[10];
 
 	if (chosen_kernel == KL_NONE) {
 		if (strstr(name, "Tahiti"))
-			this_kernel = KL_DIAKGCN;
+			clState->chosen_kernel = KL_DIAKGCN;
 		else if (!clState->hasBitAlign)
-			this_kernel = KL_POCLBM;
+			clState->chosen_kernel = KL_POCLBM;
 		else
-			this_kernel = KL_PHATK;
+			clState->chosen_kernel = KL_PHATK;
 	} else
-		this_kernel = chosen_kernel;
+		clState->chosen_kernel = chosen_kernel;
 
-	switch (this_kernel) {
+	switch (clState->chosen_kernel) {
 		case KL_DIAKGCN:
 			strcpy(filename, DIAKGCN_KERNNAME".cl");
 			strcpy(binaryfilename, DIAKGCN_KERNNAME);

ocl.h

@@ -11,6 +11,8 @@
 #include <CL/cl.h>
 #endif
 
+#include "miner.h"
+
 typedef struct {
 	cl_context context;
 	cl_kernel kernel;
@@ -22,6 +24,7 @@ typedef struct {
 	cl_uint preferred_vwidth;
 	size_t max_work_size;
 	size_t work_size;
+	enum cl_kernels chosen_kernel;
 } _clState;
 
 extern char *file_contents(const char *filename, int *length);