Merge tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linuxgrafted

Pull io_uring fixes from Jens Axboe:

 - Fix a task_work add use-after-free with SQPOLL.

   The sqpoll thread could pop and complete the last request while
   io_req_normal_work_add() was still looking at them after the mpscq
   push.

   Use the same approach as DEFER_TASKRUN to protect from that, holding
   an RCU read lock across the add, and have exit wait for an RCU grace
   period for SQPOLL rings as well.

 - CQE32 ring fixes: correct the free entry check for 32b CQEs, zero the
   big_cqe for aux CQEs, and only post the dummy skip CQE on CQE_MIXED
   rings

 - Mark the source filter table as COW when cloning bpf filters, so
   registering another filter on the source doesn't modify the shared
   table in place

 - Initialize the task context before running the BPF loop

 - Requeue zcrx multishot receives stopped by a local resource

 - End a TX_TIMESTAMP multishot cmd when the CQ is full (lollipopkit)

* tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring: fix task_work add use-after-free with SQPOLL
  io_uring/cmd_net: end TX_TIMESTAMP multishot when the CQ is full
  io_uring/zcrx: requeue multishot receives stopped by a local resource
  io_uring: initialize task context before running the BPF loop
  io_uring: zero big_cqe for aux CQEs on CQE32 rings
  io_uring: fix free entry check for 32b CQEs on CQE32 rings
  io_uring: only post the dummy skip CQE on CQE_MIXED rings
  io_uring/bpf_filter: mark source as COW when cloning filters

1 files changed, 152 insertions, 0 deletions

diff --git a/drivers/gnss/mtk.c b/drivers/gnss/mtk.c
new file mode 100644
index 000000000..c62b1211f
--- /dev/null
+++ b/drivers/gnss/mtk.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mediatek GNSS receiver driver
+ *
+ * Copyright (C) 2018 Johan Hovold <johan@kernel.org>
+ */
+
+#include <linux/errno.h>
+#include <linux/gnss.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+#include <linux/serdev.h>
+
+#include "serial.h"
+
+struct mtk_data {
+	struct regulator *vbackup;
+	struct regulator *vcc;
+};
+
+static int mtk_set_active(struct gnss_serial *gserial)
+{
+	struct mtk_data *data = gnss_serial_get_drvdata(gserial);
+	int ret;
+
+	ret = regulator_enable(data->vcc);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int mtk_set_standby(struct gnss_serial *gserial)
+{
+	struct mtk_data *data = gnss_serial_get_drvdata(gserial);
+	int ret;
+
+	ret = regulator_disable(data->vcc);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int mtk_set_power(struct gnss_serial *gserial,
+			 enum gnss_serial_pm_state state)
+{
+	switch (state) {
+	case GNSS_SERIAL_ACTIVE:
+		return mtk_set_active(gserial);
+	case GNSS_SERIAL_OFF:
+	case GNSS_SERIAL_STANDBY:
+		return mtk_set_standby(gserial);
+	}
+
+	return -EINVAL;
+}
+
+static const struct gnss_serial_ops mtk_gserial_ops = {
+	.set_power = mtk_set_power,
+};
+
+static int mtk_probe(struct serdev_device *serdev)
+{
+	struct gnss_serial *gserial;
+	struct mtk_data *data;
+	int ret;
+
+	gserial = gnss_serial_allocate(serdev, sizeof(*data));
+	if (IS_ERR(gserial)) {
+		ret = PTR_ERR(gserial);
+		return ret;
+	}
+
+	gserial->ops = &mtk_gserial_ops;
+
+	gserial->gdev->type = GNSS_TYPE_MTK;
+
+	data = gnss_serial_get_drvdata(gserial);
+
+	data->vcc = devm_regulator_get(&serdev->dev, "vcc");
+	if (IS_ERR(data->vcc)) {
+		ret = PTR_ERR(data->vcc);
+		goto err_free_gserial;
+	}
+
+	data->vbackup = devm_regulator_get_optional(&serdev->dev, "vbackup");
+	if (IS_ERR(data->vbackup)) {
+		ret = PTR_ERR(data->vbackup);
+		if (ret == -ENODEV)
+			data->vbackup = NULL;
+		else
+			goto err_free_gserial;
+	}
+
+	if (data->vbackup) {
+		ret = regulator_enable(data->vbackup);
+		if (ret)
+			goto err_free_gserial;
+	}
+
+	ret = gnss_serial_register(gserial);
+	if (ret)
+		goto err_disable_vbackup;
+
+	return 0;
+
+err_disable_vbackup:
+	if (data->vbackup)
+		regulator_disable(data->vbackup);
+err_free_gserial:
+	gnss_serial_free(gserial);
+
+	return ret;
+}
+
+static void mtk_remove(struct serdev_device *serdev)
+{
+	struct gnss_serial *gserial = serdev_device_get_drvdata(serdev);
+	struct mtk_data *data = gnss_serial_get_drvdata(gserial);
+
+	gnss_serial_deregister(gserial);
+	if (data->vbackup)
+		regulator_disable(data->vbackup);
+	gnss_serial_free(gserial);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id mtk_of_match[] = {
+	{ .compatible = "globaltop,pa6h" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_of_match);
+#endif
+
+static struct serdev_device_driver mtk_driver = {
+	.driver	= {
+		.name		= "gnss-mtk",
+		.of_match_table	= of_match_ptr(mtk_of_match),
+		.pm		= &gnss_serial_pm_ops,
+	},
+	.probe	= mtk_probe,
+	.remove	= mtk_remove,
+};
+module_serdev_device_driver(mtk_driver);
+
+MODULE_AUTHOR("Loys Ollivier <lollivier@baylibre.com>");
+MODULE_DESCRIPTION("Mediatek GNSS receiver driver");
+MODULE_LICENSE("GPL v2");