From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/drivers/media/dvb-core/dvb_frontend.c | 169 +++++++++++++++++++++++++++++---------------------------
1 files changed, 87 insertions(+), 82 deletions(-)
diff --git a/kernel/drivers/media/dvb-core/dvb_frontend.c b/kernel/drivers/media/dvb-core/dvb_frontend.c
index 8a61150..06ea30a 100644
--- a/kernel/drivers/media/dvb-core/dvb_frontend.c
+++ b/kernel/drivers/media/dvb-core/dvb_frontend.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* dvb_frontend.c: DVB frontend tuning interface/thread
- *
*
* Copyright (C) 1999-2001 Ralph Metzler
* Marcus Metzler
@@ -8,18 +8,6 @@
* for convergence integrated media GmbH
*
* Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- * To obtain the license, point your browser to
- * http://www.gnu.org/copyleft/gpl.html
*/
/* Enables DVBv3 compatibility bits at the headers */
@@ -920,6 +908,9 @@
"DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
fe->dvb->num, fe->id);
+ dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u",
+ tuner_min, tuner_max, frontend_min, frontend_max);
+
/* If the standard is for satellite, convert frequencies to kHz */
switch (c->delivery_system) {
case SYS_DVBS:
@@ -1596,7 +1587,7 @@
*
* Provides emulation for delivery systems that are compatible with the old
* DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
- * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
+ * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend
* parameters are compatible with DVB-S spec.
*/
static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
@@ -2323,6 +2314,78 @@
return 0;
}
+static int dvb_get_property(struct dvb_frontend *fe, struct file *file,
+ struct dtv_properties *tvps)
+{
+ struct dvb_frontend_private *fepriv = fe->frontend_priv;
+ struct dtv_property *tvp = NULL;
+ struct dtv_frontend_properties getp;
+ int i, err;
+
+ memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
+
+ dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
+ __func__, tvps->num);
+ dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
+ __func__, tvps->props);
+
+ /*
+ * Put an arbitrary limit on the number of messages that can
+ * be sent at once
+ */
+ if (!tvps->num || tvps->num > DTV_IOCTL_MAX_MSGS)
+ return -EINVAL;
+
+ tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
+ if (IS_ERR(tvp))
+ return PTR_ERR(tvp);
+
+ /*
+ * Let's use our own copy of property cache, in order to
+ * avoid mangling with DTV zigzag logic, as drivers might
+ * return crap, if they don't check if the data is available
+ * before updating the properties cache.
+ */
+ if (fepriv->state != FESTATE_IDLE) {
+ err = dtv_get_frontend(fe, &getp, NULL);
+ if (err < 0)
+ goto out;
+ }
+ for (i = 0; i < tvps->num; i++) {
+ err = dtv_property_process_get(fe, &getp,
+ tvp + i, file);
+ if (err < 0)
+ goto out;
+ }
+
+ if (copy_to_user((void __user *)tvps->props, tvp,
+ tvps->num * sizeof(struct dtv_property))) {
+ err = -EFAULT;
+ goto out;
+ }
+
+ err = 0;
+out:
+ kfree(tvp);
+ return err;
+}
+
+static int dvb_get_frontend(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *p_out)
+{
+ struct dtv_frontend_properties getp;
+
+ /*
+ * Let's use our own copy of property cache, in order to
+ * avoid mangling with DTV zigzag logic, as drivers might
+ * return crap, if they don't check if the data is available
+ * before updating the properties cache.
+ */
+ memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
+
+ return dtv_get_frontend(fe, &getp, p_out);
+}
+
static int dvb_frontend_handle_ioctl(struct file *file,
unsigned int cmd, void *parg)
{
@@ -2368,64 +2431,15 @@
err = 0;
break;
}
- case FE_GET_PROPERTY: {
- struct dtv_properties *tvps = parg;
- struct dtv_property *tvp = NULL;
- struct dtv_frontend_properties getp = fe->dtv_property_cache;
-
- dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
- __func__, tvps->num);
- dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
- __func__, tvps->props);
-
- /*
- * Put an arbitrary limit on the number of messages that can
- * be sent at once
- */
- if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
- return -EINVAL;
-
- tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
- if (IS_ERR(tvp))
- return PTR_ERR(tvp);
-
- /*
- * Let's use our own copy of property cache, in order to
- * avoid mangling with DTV zigzag logic, as drivers might
- * return crap, if they don't check if the data is available
- * before updating the properties cache.
- */
- if (fepriv->state != FESTATE_IDLE) {
- err = dtv_get_frontend(fe, &getp, NULL);
- if (err < 0) {
- kfree(tvp);
- return err;
- }
- }
- for (i = 0; i < tvps->num; i++) {
- err = dtv_property_process_get(fe, &getp,
- tvp + i, file);
- if (err < 0) {
- kfree(tvp);
- return err;
- }
- }
-
- if (copy_to_user((void __user *)tvps->props, tvp,
- tvps->num * sizeof(struct dtv_property))) {
- kfree(tvp);
- return -EFAULT;
- }
- kfree(tvp);
- err = 0;
+ case FE_GET_PROPERTY:
+ err = dvb_get_property(fe, file, parg);
break;
- }
case FE_GET_INFO: {
struct dvb_frontend_info *info = parg;
memset(info, 0, sizeof(*info));
- strcpy(info->name, fe->ops.info.name);
+ strscpy(info->name, fe->ops.info.name, sizeof(info->name));
info->symbol_rate_min = fe->ops.info.symbol_rate_min;
info->symbol_rate_max = fe->ops.info.symbol_rate_max;
info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
@@ -2557,7 +2571,6 @@
fepriv->tune_mode_flags = (unsigned long)parg;
err = 0;
break;
-
/* DEPRECATED dish control ioctls */
case FE_DISHNETWORK_SEND_LEGACY_CMD:
@@ -2590,8 +2603,8 @@
u8 last = 1;
if (dvb_frontend_debug)
- dprintk("%s switch command: 0x%04lx\n",
- __func__, swcmd);
+ dprintk("switch command: 0x%04lx\n",
+ swcmd);
nexttime = ktime_get_boottime();
if (dvb_frontend_debug)
tv[0] = nexttime;
@@ -2614,8 +2627,8 @@
dvb_frontend_sleep_until(&nexttime, 8000);
}
if (dvb_frontend_debug) {
- dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
- __func__, fe->dvb->num);
+ dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n",
+ fe->dvb->num);
for (i = 1; i < 10; i++)
pr_info("%d: %d\n", i,
(int)ktime_us_delta(tv[i], tv[i - 1]));
@@ -2676,22 +2689,14 @@
break;
err = dtv_set_frontend(fe);
break;
+
case FE_GET_EVENT:
err = dvb_frontend_get_event(fe, parg, file->f_flags);
break;
- case FE_GET_FRONTEND: {
- struct dtv_frontend_properties getp = fe->dtv_property_cache;
-
- /*
- * Let's use our own copy of property cache, in order to
- * avoid mangling with DTV zigzag logic, as drivers might
- * return crap, if they don't check if the data is available
- * before updating the properties cache.
- */
- err = dtv_get_frontend(fe, &getp, parg);
+ case FE_GET_FRONTEND:
+ err = dvb_get_frontend(fe, parg);
break;
- }
default:
return -ENOTSUPP;
--
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