cpukit/libdrvmgr/drvmgr_by_id.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /* Find driver by driver-ID
0004  *
0005  * COPYRIGHT (c) 2011 Cobham Gaisler AB.
0006  *
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, this list of conditions and the following disclaimer.
0012  * 2. Redistributions in binary form must reproduce the above copyright
0013  *    notice, this list of conditions and the following disclaimer in the
0014  *    documentation and/or other materials provided with the distribution.
0015  *
0016  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0017  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0018  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0019  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0020  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0021  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0022  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0023  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0024  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0025  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0026  * POSSIBILITY OF SUCH DAMAGE.
0027  */
0028
0029 #include <drvmgr/drvmgr.h>
0030 #include "drvmgr_internal.h"
0031
0032 /* Get driver from driver name */
0033 struct drvmgr_drv *drvmgr_drv_by_id(uint64_t id)
0034 {
0035     struct drvmgr *mgr = &drvmgr;
0036     struct drvmgr_drv *drv = NULL;
0037
0038     /* NOTE: No locking is needed here since Driver list is supposed to be
0039      *       initialized once during startup, we treat it as a static
0040      *       read-only list
0041      */
0042
0043     drv = DRV_LIST_HEAD(&mgr->drivers);
0044     while (drv) {
0045         if (drv->drv_id == id)
0046             break;
0047         drv = drv->next;
0048     }
0049
0050     return drv;
0051 }