Use -ENOBUFS to indicate insufficient preallocated buffer

include/ecrt.h

@@ -2079,7 +2079,7 @@ ec_request_state_t ecrt_sdo_request_state(
  * \ingroup ApplicationInterfaceRT
  * \return 0 on success, otherwise negative error code.
  * \retval -EINVAL Invalid input data, e.g. data size == 0.
- * \retval -ENOMEM Reserved memory in ecrt_slave_config_create_sdo_request()
+ * \retval -ENOBUFS Reserved memory in ecrt_slave_config_create_sdo_request()
  *              too small.
  */
 EC_PUBLIC_API int ecrt_sdo_request_write(
@@ -2220,7 +2220,7 @@ EC_PUBLIC_API ec_request_state_t ecrt_soe_request_state(
  * \ingroup ApplicationInterfaceRT
  * \return 0 on success, otherwise negative error code.
  * \retval -EINVAL Invalid input data, e.g. data size == 0.
- * \retval -ENOMEM Reserved memory in ecrt_slave_config_create_soe_request()
+ * \retval -ENOBUFS Reserved memory in ecrt_slave_config_create_soe_request()
  *              too small.
  */
 EC_PUBLIC_API int ecrt_soe_request_write(
@@ -2342,6 +2342,8 @@ EC_PUBLIC_API size_t ecrt_voe_handler_data_size(
  *
  * \ingroup ApplicationInterfaceRT
  * \return 0 on success, otherwise negative error code.
+ * \retval -ENOBUFS Reserved memory in ecrt_slave_config_create_voe_handler
+ *                  too small.
  */
 EC_PUBLIC_API int ecrt_voe_handler_write(
         ec_voe_handler_t *voe, /**< VoE handler. */
@@ -2473,6 +2475,8 @@ ec_request_state_t ecrt_reg_request_state(
  *
  * \ingroup ApplicationInterfaceRT
  * \return 0 on success, otherwise negative error code.
+ * \retval -ENOBUFS Reserved memory in ecrt_slave_config_create_reg_request
+ *              too small.
  */
 EC_PUBLIC_API int ecrt_reg_request_write(
         ec_reg_request_t *req, /**< Register request. */
@@ -2493,6 +2497,8 @@ EC_PUBLIC_API int ecrt_reg_request_write(
  *
  * \ingroup ApplicationInterfaceRT
  * \return 0 on success, otherwise negative error code.
+ * \retval -ENOBUFS Reserved memory in ecrt_slave_config_create_reg_request
+ *              too small.
  */
 EC_PUBLIC_API int ecrt_reg_request_read(
         ec_reg_request_t *req, /**< Register request. */

master/fsm_coe.c

@@ -1309,7 +1309,7 @@ void ec_fsm_coe_down_start(
     if (slave->configured_rx_mailbox_size <
             EC_MBOX_HEADER_SIZE + EC_COE_DOWN_REQ_HEADER_SIZE) {
         EC_SLAVE_ERR(slave, "Mailbox too small!\n");
-        request->errno = EOVERFLOW;
+        request->errno = ENOBUFS;
         fsm->state = ec_fsm_coe_error;
         return;
     }
@@ -2463,7 +2463,7 @@ void ec_fsm_coe_up_seg_response(
         EC_SLAVE_ERR(slave, "SDO upload 0x%04X:%02X failed: Fragment"
                 " exceeding complete size!\n",
                 request->index, request->subindex);
-        request->errno = EOVERFLOW;
+        request->errno = ENOBUFS;
         fsm->state = ec_fsm_coe_error;
         return;
     }

master/ioctl.c

@@ -3626,7 +3626,7 @@ static ATTRIBUTES int ec_ioctl_sdo_request_write(
     }
 
     if (data.size > req->mem_size)
-        return -ENOMEM;
+        return -ENOBUFS;
 
     if (ec_copy_from_user(req->data, (void __user *) data.data,
                           data.size, ctx))
@@ -3870,7 +3870,7 @@ static ATTRIBUTES int ec_ioctl_soe_request_write(
     }
 
     if (data.size > req->mem_size)
-        return -ENOMEM;
+        return -ENOBUFS;
 
     if (ec_copy_from_user(req->data, (void __user *) data.data,
                           data.size, ctx))
@@ -4048,7 +4048,7 @@ static ATTRIBUTES int ec_ioctl_reg_request_write(
     }
 
     if (io.transfer_size > reg->mem_size) {
-        return -EOVERFLOW;
+        return -ENOBUFS;
     }
 
     if (ec_copy_from_user(reg->data, (void __user *) io.data,
@@ -4095,7 +4095,7 @@ static ATTRIBUTES int ec_ioctl_reg_request_read(
     }
 
     if (io.transfer_size > reg->mem_size) {
-        return -EOVERFLOW;
+        return -ENOBUFS;
     }
 
     return ecrt_reg_request_read(reg, io.address, io.transfer_size);
@@ -4306,7 +4306,7 @@ static ATTRIBUTES int ec_ioctl_voe_write(
 
     if (data.size) {
         if (data.size > ec_voe_handler_mem_size(voe))
-            return -EOVERFLOW;
+            return -ENOBUFS;
 
         if (ec_copy_from_user(ecrt_voe_handler_data(voe),
                     (void __user *) data.data, data.size, ctx))
@@ -4482,7 +4482,7 @@ static ATTRIBUTES int ec_ioctl_slave_foe_read(
         if (request.data_size > io.buffer_size) {
             EC_SLAVE_ERR(slave, "%s(): Buffer too small.\n", __func__);
             ec_foe_request_clear(&request);
-            return -EOVERFLOW;
+            return -ENOBUFS;
         }
         io.data_size = request.data_size;
         if (copy_to_user((void __user *) io.buffer,

master/mailbox.c

@@ -60,7 +60,7 @@ uint8_t *ec_slave_mbox_prepare_send(const ec_slave_t *slave, /**< slave */
     if (unlikely(total_size > slave->configured_rx_mailbox_size)) {
         EC_SLAVE_ERR(slave, "Data size (%zu) does not fit in mailbox (%u)!\n",
                 total_size, slave->configured_rx_mailbox_size);
-        return ERR_PTR(-EOVERFLOW);
+        return ERR_PTR(-ENOBUFS);
     }
 
     ret = ec_datagram_fpwr(datagram, slave->station_address,

master/master.c

@@ -3092,7 +3092,7 @@ int ecrt_master_sdo_upload(ec_master_t *master, uint16_t slave_position,
     } else {
         if (request.data_size > target_size) {
             EC_SLAVE_ERR(slave, "%s(): Buffer too small.\n", __func__);
-            ret = -EOVERFLOW;
+            ret = -ENOBUFS;
         }
         else {
             memcpy(target, request.data, request.data_size);
@@ -3250,7 +3250,7 @@ int ecrt_master_read_idn(ec_master_t *master, uint16_t slave_position,
     } else { // success
         if (request.data_size > target_size) {
             EC_SLAVE_ERR(slave, "%s(): Buffer too small.\n", __func__);
-            ret = -EOVERFLOW;
+            ret = -ENOBUFS;
         }
         else { // data fits in buffer
             if (result_size) {