diff --git a/kernels/linear.cl b/kernels/linear.cl
index 410b610..6d7a1c0 100644
--- a/kernels/linear.cl
+++ b/kernels/linear.cl
@@ -84,7 +84,7 @@ void largeMV(const int n, const int m, __global float* y, __global float* A, __g
 		if (z == 0) {
 			y[i + t] = 0;
 		}
-		Q[id] = 0;
+		//Q[id] = 0;
 		for (size_t j = 0; j < n; j += T) { // oszlop kezdete ahol a modul van
 		
 			//Q[t * Z + z] += A[(j + z) + (i + t) * m] * x[i + t];
@@ -92,7 +92,7 @@ void largeMV(const int n, const int m, __global float* y, __global float* A, __g
 			barrier(CLK_LOCAL_MEM_FENCE);
 
 			for (size_t s = Z / 2; s > 0; s >>= 1) {
-				if (t < s) {
+				if (z < s) {
 					Q[t * Z + z] = Q[t * Z + z] + Q[t * Z + z + s];
 				}
 				barrier(CLK_LOCAL_MEM_FENCE);