FM: jni: Treat only negative return values as errors

FM kernel driver can return zero or positive
values in case of success. Make changes to treat
only negative return values as errors.

Change-Id: Ief859af604349a2e47daee18693723600154d1a9

jni/FmIoctlsInterface.cpp

@@ -50,7 +50,7 @@ int  FmIoctlsInterface :: get_cur_freq
     channel.type = V4L2_TUNER_RADIO;
     ret = ioctl(fd, VIDIOC_G_FREQUENCY, &channel);
 
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         freq = (channel.frequency / TUNE_MULT);
@@ -70,7 +70,7 @@ int  FmIoctlsInterface :: set_freq
     channel.frequency = (freq * TUNE_MULT);
 
     ret = ioctl(fd, VIDIOC_S_FREQUENCY, &channel);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         return FM_SUCCESS;
@@ -90,7 +90,7 @@ int FmIoctlsInterface :: set_control
 
     for(int i = 0; i < 3; i++) {
         ret = ioctl(fd, VIDIOC_S_CTRL, &control);
-        if(ret != IOCTL_SUCC) {
+        if(ret < IOCTL_SUCC) {
            ret = FM_FAILURE;
         }else {
            ret = FM_SUCCESS;
@@ -127,7 +127,7 @@ int  FmIoctlsInterface :: set_calibration
        v4l2_ctls.count = 1;
        v4l2_ctls.controls = &ext_ctl;
        ret = ioctl(fd, VIDIOC_S_EXT_CTRLS, &v4l2_ctls);
-       if(ret != IOCTL_SUCC) {
+       if(ret < IOCTL_SUCC) {
            ALOGE("%s: ioctl call failed\n", LOGTAG);
            return FM_FAILURE;
        }else {
@@ -148,7 +148,7 @@ int  FmIoctlsInterface :: get_control
 
     control.id = id;
     ret = ioctl(fd, VIDIOC_G_CTRL, &control);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         val = control.value;
@@ -168,7 +168,7 @@ int  FmIoctlsInterface :: start_search
     hw_seek.type = V4L2_TUNER_RADIO;
 
     ret = ioctl(fd, VIDIOC_S_HW_FREQ_SEEK, &hw_seek);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         return FM_SUCCESS;
@@ -190,7 +190,7 @@ int  FmIoctlsInterface :: set_band
 
     ret = ioctl(fd, VIDIOC_S_TUNER, &tuner);
     ret = set_control(fd, V4L2_CID_PRV_REGION, 0);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         return FM_SUCCESS;
@@ -208,7 +208,7 @@ int FmIoctlsInterface :: get_rmssi
     tuner.index = 0;
     tuner.signal = 0;
     ret = ioctl(fd, VIDIOC_G_TUNER, &tuner);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         ret = FM_FAILURE;
     }else {
         rmssi = tuner.signal;
@@ -227,7 +227,7 @@ int FmIoctlsInterface :: get_upperband_limit
 
     tuner.index = 0;
     ret = ioctl(fd, VIDIOC_G_TUNER, &tuner);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         freq = (tuner.rangehigh / TUNE_MULT);
@@ -245,7 +245,7 @@ int FmIoctlsInterface :: get_lowerband_limit
 
     tuner.index = 0;
     ret = ioctl(fd, VIDIOC_G_TUNER, &tuner);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         freq = (tuner.rangelow / TUNE_MULT);
@@ -263,12 +263,12 @@ int FmIoctlsInterface :: set_audio_mode
 
     tuner.index = 0;
     ret = ioctl(fd, VIDIOC_G_TUNER, &tuner);
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
         return FM_FAILURE;
     }else {
         tuner.audmode = mode;
         ret = ioctl(fd, VIDIOC_S_TUNER, &tuner);
-        if(ret != IOCTL_SUCC) {
+        if(ret < IOCTL_SUCC) {
             return FM_FAILURE;
         }else {
             return FM_SUCCESS;
@@ -293,7 +293,7 @@ int FmIoctlsInterface :: get_buffer
         v4l2_buf.length = STD_BUF_SIZE;
         v4l2_buf.m.userptr = (ULINT)buff;
         ret = ioctl(fd, VIDIOC_DQBUF, &v4l2_buf);
-        if(ret != IOCTL_SUCC) {
+        if(ret < IOCTL_SUCC) {
             return FM_FAILURE;
         }else {
             return v4l2_buf.bytesused;
@@ -311,7 +311,7 @@ int FmIoctlsInterface :: set_ext_control
 
     ret = ioctl(fd, VIDIOC_S_EXT_CTRLS, v4l2_ctls);
 
-    if(ret != IOCTL_SUCC) {
+    if(ret < IOCTL_SUCC) {
        return FM_FAILURE;
     }else {
        return FM_SUCCESS;