diff --git a/driver/level2/gbmv_thread.c b/driver/level2/gbmv_thread.c
index e86b565f8e..9d374676e6 100644
--- a/driver/level2/gbmv_thread.c
+++ b/driver/level2/gbmv_thread.c
@@ -230,8 +230,10 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG ku, BLASLONG kl, FLOAT *alpha, FLOAT
 
 #ifndef TRANSA
     range_m[num_cpu] = num_cpu * ((m + 15) & ~15);
+    if (range_m[num_cpu] > m) range_m[num_cpu] = m;
 #else
     range_m[num_cpu] = num_cpu * ((n + 15) & ~15);
+    if (range_m[num_cpu] > n) range_m[num_cpu] = n;
 #endif
 
     queue[num_cpu].mode    = mode;
diff --git a/driver/level2/sbmv_thread.c b/driver/level2/sbmv_thread.c
index 5718c0ec93..ce841ee0e6 100644
--- a/driver/level2/sbmv_thread.c
+++ b/driver/level2/sbmv_thread.c
@@ -246,6 +246,7 @@ int CNAME(BLASLONG n, BLASLONG k, FLOAT *alpha, FLOAT *a, BLASLONG lda, FLOAT *x
 
       range_m[MAX_CPU_NUMBER - num_cpu - 1] = range_m[MAX_CPU_NUMBER - num_cpu] - width;
       range_n[num_cpu] = num_cpu * (((n + 15) & ~15) + 16);
+      if (range_n[num_cpu] > n) range_n[num_cpu] = n;
 
       queue[num_cpu].mode    = mode;
       queue[num_cpu].routine = sbmv_kernel;
@@ -285,6 +286,7 @@ int CNAME(BLASLONG n, BLASLONG k, FLOAT *alpha, FLOAT *a, BLASLONG lda, FLOAT *x
 
       range_m[num_cpu + 1] = range_m[num_cpu] + width;
       range_n[num_cpu] = num_cpu * (((n + 15) & ~15) + 16);
+      if (range_n[num_cpu] > n) range_n[num_cpu] = n;
 
       queue[num_cpu].mode    = mode;
       queue[num_cpu].routine = sbmv_kernel;
@@ -316,6 +318,7 @@ int CNAME(BLASLONG n, BLASLONG k, FLOAT *alpha, FLOAT *a, BLASLONG lda, FLOAT *x
       range_m[num_cpu + 1] = range_m[num_cpu] + width;
 
       range_n[num_cpu] = num_cpu * ((n + 15) & ~15);
+      if (range_n[num_cpu] > n) range_n[num_cpu] = n;
 
       queue[num_cpu].mode    = mode;
       queue[num_cpu].routine = sbmv_kernel;
diff --git a/driver/level2/spmv_thread.c b/driver/level2/spmv_thread.c
index 035300841d..0b40874301 100644
--- a/driver/level2/spmv_thread.c
+++ b/driver/level2/spmv_thread.c
@@ -246,6 +246,7 @@ int CNAME(BLASLONG m, FLOAT *alpha, FLOAT *a, FLOAT *x, BLASLONG incx, FLOAT *y,
 
     range_m[MAX_CPU_NUMBER - num_cpu - 1] = range_m[MAX_CPU_NUMBER - num_cpu] - width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = spmv_kernel;
@@ -285,6 +286,7 @@ int CNAME(BLASLONG m, FLOAT *alpha, FLOAT *a, FLOAT *x, BLASLONG incx, FLOAT *y,
 
     range_m[num_cpu + 1] = range_m[num_cpu] + width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = spmv_kernel;
diff --git a/driver/level2/symv_thread.c b/driver/level2/symv_thread.c
index 6580178f15..8d4cd249ca 100644
--- a/driver/level2/symv_thread.c
+++ b/driver/level2/symv_thread.c
@@ -177,7 +177,8 @@ int CNAME(BLASLONG m, FLOAT *alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG i
 
     range_m[num_cpu + 1] = range_m[num_cpu] + width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
-
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
+    
     queue[MAX_CPU_NUMBER - num_cpu - 1].mode    = mode;
     queue[MAX_CPU_NUMBER - num_cpu - 1].routine = symv_kernel;
     queue[MAX_CPU_NUMBER - num_cpu - 1].args    = &args;
@@ -225,6 +226,7 @@ int CNAME(BLASLONG m, FLOAT *alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG i
 
     range_m[num_cpu + 1] = range_m[num_cpu] + width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = symv_kernel;
diff --git a/driver/level2/tbmv_thread.c b/driver/level2/tbmv_thread.c
index 226a922e99..aaf4958e28 100644
--- a/driver/level2/tbmv_thread.c
+++ b/driver/level2/tbmv_thread.c
@@ -288,6 +288,7 @@ int CNAME(BLASLONG n, BLASLONG k, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc
 
       range_m[MAX_CPU_NUMBER - num_cpu - 1] = range_m[MAX_CPU_NUMBER - num_cpu] - width;
       range_n[num_cpu] = num_cpu * (((n + 15) & ~15) + 16);
+      if (range_n[num_cpu] > n) range_n[num_cpu] = n;
 
       queue[num_cpu].mode    = mode;
       queue[num_cpu].routine = trmv_kernel;
@@ -327,6 +328,7 @@ int CNAME(BLASLONG n, BLASLONG k, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc
 
       range_m[num_cpu + 1] = range_m[num_cpu] + width;
       range_n[num_cpu] = num_cpu * (((n + 15) & ~15) + 16);
+      if (range_n[num_cpu] > n) range_n[num_cpu] = n;
 
       queue[num_cpu].mode    = mode;
       queue[num_cpu].routine = trmv_kernel;
@@ -356,6 +358,7 @@ int CNAME(BLASLONG n, BLASLONG k, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc
 
       range_m[num_cpu + 1] = range_m[num_cpu] + width;
       range_n[num_cpu] = num_cpu * (((n + 15) & ~15) + 16);
+      if (range_n[num_cpu] > n) range_n[num_cpu] = n;
 
       queue[num_cpu].mode    = mode;
       queue[num_cpu].routine = trmv_kernel;
diff --git a/driver/level2/tpmv_thread.c b/driver/level2/tpmv_thread.c
index c91b527750..79438ba291 100644
--- a/driver/level2/tpmv_thread.c
+++ b/driver/level2/tpmv_thread.c
@@ -307,7 +307,8 @@ int CNAME(BLASLONG m, FLOAT *a, FLOAT *x, BLASLONG incx, FLOAT *buffer, int nthr
 
     range_m[MAX_CPU_NUMBER - num_cpu - 1] = range_m[MAX_CPU_NUMBER - num_cpu] - width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
-
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
+    
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = tpmv_kernel;
     queue[num_cpu].args    = &args;
@@ -346,6 +347,7 @@ int CNAME(BLASLONG m, FLOAT *a, FLOAT *x, BLASLONG incx, FLOAT *buffer, int nthr
 
     range_m[num_cpu + 1] = range_m[num_cpu] + width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = tpmv_kernel;
diff --git a/driver/level2/trmv_thread.c b/driver/level2/trmv_thread.c
index 0a155366c3..24b881a93b 100644
--- a/driver/level2/trmv_thread.c
+++ b/driver/level2/trmv_thread.c
@@ -346,6 +346,7 @@ int CNAME(BLASLONG m, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG incx, FLOAT *bu
 
     range_m[MAX_CPU_NUMBER - num_cpu - 1] = range_m[MAX_CPU_NUMBER - num_cpu] - width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = trmv_kernel;
@@ -385,6 +386,7 @@ int CNAME(BLASLONG m, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG incx, FLOAT *bu
 
     range_m[num_cpu + 1] = range_m[num_cpu] + width;
     range_n[num_cpu] = num_cpu * (((m + 15) & ~15) + 16);
+    if (range_n[num_cpu] > m) range_n[num_cpu] = m;
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = trmv_kernel;