mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
0435b13ee3
If a call to device_create() fails for a channel during the initialize loop, we need to clean the devices entries already created before leaving. Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: linux-mips@linux-mips.org Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Cc: John Crispin <blogic@openwrt.org> Cc: Qais Yousef <Qais.Yousef@imgtec.com> Cc: linux-kernel@vger.kernel.org Cc: Jerome Oufella <jerome.oufella@savoirfairelinux.com> Patchwork: https://patchwork.linux-mips.org/patch/7111/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
|
|
* Copyright (C) 2013 Imagination Technologies Ltd.
|
|
*/
|
|
#include <linux/device.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/err.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/mips_mt.h>
|
|
#include <asm/vpe.h>
|
|
#include <asm/rtlx.h>
|
|
|
|
static int major;
|
|
|
|
static void rtlx_interrupt(void)
|
|
{
|
|
int i;
|
|
struct rtlx_info *info;
|
|
struct rtlx_info **p = vpe_get_shared(aprp_cpu_index());
|
|
|
|
if (p == NULL || *p == NULL)
|
|
return;
|
|
|
|
info = *p;
|
|
|
|
if (info->ap_int_pending == 1 && smp_processor_id() == 0) {
|
|
for (i = 0; i < RTLX_CHANNELS; i++) {
|
|
wake_up(&channel_wqs[i].lx_queue);
|
|
wake_up(&channel_wqs[i].rt_queue);
|
|
}
|
|
info->ap_int_pending = 0;
|
|
}
|
|
}
|
|
|
|
void _interrupt_sp(void)
|
|
{
|
|
smp_send_reschedule(aprp_cpu_index());
|
|
}
|
|
|
|
int __init rtlx_module_init(void)
|
|
{
|
|
struct device *dev;
|
|
int i, err;
|
|
|
|
if (!cpu_has_mipsmt) {
|
|
pr_warn("VPE loader: not a MIPS MT capable processor\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (num_possible_cpus() - aprp_cpu_index() < 1) {
|
|
pr_warn("No TCs reserved for AP/SP, not initializing RTLX.\n"
|
|
"Pass maxcpus=<n> argument as kernel argument\n");
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
major = register_chrdev(0, RTLX_MODULE_NAME, &rtlx_fops);
|
|
if (major < 0) {
|
|
pr_err("rtlx_module_init: unable to register device\n");
|
|
return major;
|
|
}
|
|
|
|
/* initialise the wait queues */
|
|
for (i = 0; i < RTLX_CHANNELS; i++) {
|
|
init_waitqueue_head(&channel_wqs[i].rt_queue);
|
|
init_waitqueue_head(&channel_wqs[i].lx_queue);
|
|
atomic_set(&channel_wqs[i].in_open, 0);
|
|
mutex_init(&channel_wqs[i].mutex);
|
|
|
|
dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
|
|
"%s%d", RTLX_MODULE_NAME, i);
|
|
if (IS_ERR(dev)) {
|
|
while (i--)
|
|
device_destroy(mt_class, MKDEV(major, i));
|
|
|
|
err = PTR_ERR(dev);
|
|
goto out_chrdev;
|
|
}
|
|
}
|
|
|
|
/* set up notifiers */
|
|
rtlx_notify.start = rtlx_starting;
|
|
rtlx_notify.stop = rtlx_stopping;
|
|
vpe_notify(aprp_cpu_index(), &rtlx_notify);
|
|
|
|
if (cpu_has_vint) {
|
|
aprp_hook = rtlx_interrupt;
|
|
} else {
|
|
pr_err("APRP RTLX init on non-vectored-interrupt processor\n");
|
|
err = -ENODEV;
|
|
goto out_class;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_class:
|
|
for (i = 0; i < RTLX_CHANNELS; i++)
|
|
device_destroy(mt_class, MKDEV(major, i));
|
|
out_chrdev:
|
|
unregister_chrdev(major, RTLX_MODULE_NAME);
|
|
|
|
return err;
|
|
}
|
|
|
|
void __exit rtlx_module_exit(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < RTLX_CHANNELS; i++)
|
|
device_destroy(mt_class, MKDEV(major, i));
|
|
|
|
unregister_chrdev(major, RTLX_MODULE_NAME);
|
|
|
|
aprp_hook = NULL;
|
|
}
|