From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/media/dvb-core/dvb_ca_en50221.c | 51 ++++++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 44 insertions(+), 7 deletions(-)
diff --git a/kernel/drivers/media/dvb-core/dvb_ca_en50221.c b/kernel/drivers/media/dvb-core/dvb_ca_en50221.c
index cfc2762..dec036e 100644
--- a/kernel/drivers/media/dvb-core/dvb_ca_en50221.c
+++ b/kernel/drivers/media/dvb-core/dvb_ca_en50221.c
@@ -151,13 +151,19 @@
/* mutex serializing ioctls */
struct mutex ioctl_mutex;
+
+ /* A mutex used when a device is disconnected */
+ struct mutex remove_mutex;
+
+ /* Whether the device is disconnected */
+ int exit;
};
static void dvb_ca_private_free(struct dvb_ca_private *ca)
{
unsigned int i;
- dvb_free_device(ca->dvbdev);
+ dvb_device_put(ca->dvbdev);
for (i = 0; i < ca->slot_count; i++)
vfree(ca->slot_info[i].rx_buffer.data);
@@ -187,7 +193,7 @@
static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot,
u8 *ebuf, int ecount);
static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
- u8 *ebuf, int ecount);
+ u8 *ebuf, int ecount, int size_write_flag);
/**
* Safely find needle in haystack.
@@ -370,7 +376,7 @@
ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10);
if (ret)
return ret;
- ret = dvb_ca_en50221_write_data(ca, slot, buf, 2);
+ ret = dvb_ca_en50221_write_data(ca, slot, buf, 2, CMDREG_SW);
if (ret != 2)
return -EIO;
ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
@@ -778,11 +784,13 @@
* @buf: The data in this buffer is treated as a complete link-level packet to
* be written.
* @bytes_write: Size of ebuf.
+ * @size_write_flag: A flag on Command Register which says whether the link size
+ * information will be writen or not.
*
* return: Number of bytes written, or < 0 on error.
*/
static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
- u8 *buf, int bytes_write)
+ u8 *buf, int bytes_write, int size_write_flag)
{
struct dvb_ca_slot *sl = &ca->slot_info[slot];
int status;
@@ -817,7 +825,7 @@
/* OK, set HC bit */
status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
- IRQEN | CMDREG_HC);
+ IRQEN | CMDREG_HC | size_write_flag);
if (status)
goto exit;
@@ -1505,7 +1513,7 @@
mutex_lock(&sl->slot_lock);
status = dvb_ca_en50221_write_data(ca, slot, fragbuf,
- fraglen + 2);
+ fraglen + 2, 0);
mutex_unlock(&sl->slot_lock);
if (status == (fraglen + 2)) {
written = 1;
@@ -1706,12 +1714,22 @@
dprintk("%s\n", __func__);
- if (!try_module_get(ca->pub->owner))
+ mutex_lock(&ca->remove_mutex);
+
+ if (ca->exit) {
+ mutex_unlock(&ca->remove_mutex);
+ return -ENODEV;
+ }
+
+ if (!try_module_get(ca->pub->owner)) {
+ mutex_unlock(&ca->remove_mutex);
return -EIO;
+ }
err = dvb_generic_open(inode, file);
if (err < 0) {
module_put(ca->pub->owner);
+ mutex_unlock(&ca->remove_mutex);
return err;
}
@@ -1736,6 +1754,7 @@
dvb_ca_private_get(ca);
+ mutex_unlock(&ca->remove_mutex);
return 0;
}
@@ -1755,6 +1774,8 @@
dprintk("%s\n", __func__);
+ mutex_lock(&ca->remove_mutex);
+
/* mark the CA device as closed */
ca->open = 0;
dvb_ca_en50221_thread_update_delay(ca);
@@ -1764,6 +1785,13 @@
module_put(ca->pub->owner);
dvb_ca_private_put(ca);
+
+ if (dvbdev->users == 1 && ca->exit == 1) {
+ mutex_unlock(&ca->remove_mutex);
+ wake_up(&dvbdev->wait_queue);
+ } else {
+ mutex_unlock(&ca->remove_mutex);
+ }
return err;
}
@@ -1888,6 +1916,7 @@
}
mutex_init(&ca->ioctl_mutex);
+ mutex_init(&ca->remove_mutex);
if (signal_pending(current)) {
ret = -EINTR;
@@ -1930,6 +1959,14 @@
dprintk("%s\n", __func__);
+ mutex_lock(&ca->remove_mutex);
+ ca->exit = 1;
+ mutex_unlock(&ca->remove_mutex);
+
+ if (ca->dvbdev->users < 1)
+ wait_event(ca->dvbdev->wait_queue,
+ ca->dvbdev->users == 1);
+
/* shutdown the thread if there was one */
kthread_stop(ca->thread);
--
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