spcom: print error message on lock ion failure

Locking ION buffer should not fail, print error message if it happens.

Signed-off-by: Amir Samuelov <amirs@codeaurora.org>
Change-Id: Ic67f69daa646712dd814f29d5aa0fc68386177e1

drivers/soc/qcom/spcom.c

@@ -316,6 +316,10 @@ static int spcom_create_predefined_channels_chardev(void)
 {
 	int i;
 	int ret;
+	static bool is_predefined_created;
+
+	if (is_predefined_created)
+		return 0;
 
 	for (i = 0; i < SPCOM_MAX_CHANNELS; i++) {
 		const char *name = spcom_dev->predefined_ch_name[i];
@@ -330,6 +334,8 @@ static int spcom_create_predefined_channels_chardev(void)
 		}
 	}
 
+	is_predefined_created = true;
+
 	return 0;
 }
 
@@ -1633,12 +1639,13 @@ static int spcom_handle_lock_ion_buf_command(struct spcom_channel *ch,
 		pr_err("fail to get ion handle.\n");
 		return -EINVAL;
 	}
+
 	pr_debug("ion handle ok.\n");
 
 	/* Check if this ION buffer is already locked */
 	for (i = 0 ; i < ARRAY_SIZE(ch->ion_handle_table) ; i++) {
 		if (ch->ion_handle_table[i] == ion_handle) {
-			pr_debug("fd [%d] ion buf is already locked.\n", fd);
+			pr_err("fd [%d] ion buf is already locked.\n", fd);
 			/* decrement back the ref count */
 			ion_free(spcom_dev->ion_client, ion_handle);
 			return -EINVAL;
@@ -1650,11 +1657,14 @@ static int spcom_handle_lock_ion_buf_command(struct spcom_channel *ch,
 		if (ch->ion_handle_table[i] == NULL) {
 			ch->ion_handle_table[i] = ion_handle;
 			ch->ion_fd_table[i] = fd;
-			pr_debug("locked ion buf#[%d], fd [%d].\n", i, fd);
+			pr_debug("ch [%s] locked ion buf #%d, fd [%d].\n",
+				ch->name, i, fd);
 			return 0;
 		}
 	}
 
+	pr_err("fd [%d] ion buf not found.\n", fd);
+
 	return -EFAULT;
 }
 
@@ -1684,20 +1694,22 @@ static int spcom_unlock_ion_buf(struct spcom_channel *ch, int fd)
 		/* unlock all ION buf */
 		for (i = 0 ; i < ARRAY_SIZE(ch->ion_handle_table) ; i++) {
 			if (ch->ion_handle_table[i] != NULL) {
+				pr_debug("unlocked ion buf #%d fd [%d].\n",
+					i, ch->ion_fd_table[i]);
 				ion_free(ion_client, ch->ion_handle_table[i]);
 				ch->ion_handle_table[i] = NULL;
 				ch->ion_fd_table[i] = -1;
-				pr_debug("unlocked ion buf#[%d].\n", i);
 			}
 		}
 	} else {
 		/* unlock specific ION buf */
 		for (i = 0 ; i < ARRAY_SIZE(ch->ion_handle_table) ; i++) {
 			if (ch->ion_fd_table[i] == fd) {
+				pr_debug("unlocked ion buf #%d fd [%d].\n",
+					i, ch->ion_fd_table[i]);
 				ion_free(ion_client, ch->ion_handle_table[i]);
 				ch->ion_handle_table[i] = NULL;
 				ch->ion_fd_table[i] = -1;
-				pr_debug("unlocked ion buf#[%d].\n", i);
 				found = true;
 				break;
 			}