Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/drivers/parport/share.c b/drivers/parport/share.c
index 15c81cf..7fec4fe 100644
--- a/drivers/parport/share.c
+++ b/drivers/parport/share.c
@@ -278,47 +278,32 @@
int __parport_register_driver(struct parport_driver *drv, struct module *owner,
const char *mod_name)
{
- if (list_empty(&portlist))
+ /* using device model */
+ int ret;
+
+ /* initialize common driver fields */
+ drv->driver.name = drv->name;
+ drv->driver.bus = &parport_bus_type;
+ drv->driver.owner = owner;
+ drv->driver.mod_name = mod_name;
+ ret = driver_register(&drv->driver);
+ if (ret)
+ return ret;
+
+ /*
+ * check if bus has any parallel port registered, if
+ * none is found then load the lowlevel driver.
+ */
+ ret = bus_for_each_dev(&parport_bus_type, NULL, NULL,
+ port_detect);
+ if (!ret)
get_lowlevel_driver();
- if (drv->devmodel) {
- /* using device model */
- int ret;
-
- /* initialize common driver fields */
- drv->driver.name = drv->name;
- drv->driver.bus = &parport_bus_type;
- drv->driver.owner = owner;
- drv->driver.mod_name = mod_name;
- ret = driver_register(&drv->driver);
- if (ret)
- return ret;
-
- /*
- * check if bus has any parallel port registered, if
- * none is found then load the lowlevel driver.
- */
- ret = bus_for_each_dev(&parport_bus_type, NULL, NULL,
- port_detect);
- if (!ret)
- get_lowlevel_driver();
-
- mutex_lock(®istration_lock);
- if (drv->match_port)
- bus_for_each_dev(&parport_bus_type, NULL, drv,
- port_check);
- mutex_unlock(®istration_lock);
- } else {
- struct parport *port;
-
- drv->devmodel = false;
-
- mutex_lock(®istration_lock);
- list_for_each_entry(port, &portlist, list)
- drv->attach(port);
- list_add(&drv->list, &drivers);
- mutex_unlock(®istration_lock);
- }
+ mutex_lock(®istration_lock);
+ if (drv->match_port)
+ bus_for_each_dev(&parport_bus_type, NULL, drv,
+ port_check);
+ mutex_unlock(®istration_lock);
return 0;
}
@@ -353,17 +338,9 @@
void parport_unregister_driver(struct parport_driver *drv)
{
- struct parport *port;
-
mutex_lock(®istration_lock);
- if (drv->devmodel) {
- bus_for_each_dev(&parport_bus_type, NULL, drv, port_detach);
- driver_unregister(&drv->driver);
- } else {
- list_del_init(&drv->list);
- list_for_each_entry(port, &portlist, list)
- drv->detach(port);
- }
+ bus_for_each_dev(&parport_bus_type, NULL, drv, port_detach);
+ driver_unregister(&drv->driver);
mutex_unlock(®istration_lock);
}
EXPORT_SYMBOL(parport_unregister_driver);
@@ -555,8 +532,8 @@
#endif
if (!port->dev)
- printk(KERN_WARNING "%s: fix this legacy no-device port driver!\n",
- port->name);
+ pr_warn("%s: fix this legacy no-device port driver!\n",
+ port->name);
parport_proc_register(port);
mutex_lock(®istration_lock);
@@ -642,47 +619,48 @@
}
EXPORT_SYMBOL(parport_remove_port);
+static void free_pardevice(struct device *dev)
+{
+ struct pardevice *par_dev = to_pardevice(dev);
+
+ kfree(par_dev->name);
+ kfree(par_dev);
+}
+
/**
- * parport_register_device - register a device on a parallel port
+ * parport_register_dev_model - register a device on a parallel port
* @port: port to which the device is attached
* @name: a name to refer to the device
- * @pf: preemption callback
- * @kf: kick callback (wake-up)
- * @irq_func: interrupt handler
- * @flags: registration flags
- * @handle: data for callback functions
+ * @par_dev_cb: struct containing callbacks
+ * @id: device number to be given to the device
*
* This function, called by parallel port device drivers,
* declares that a device is connected to a port, and tells the
* system all it needs to know.
*
- * The @name is allocated by the caller and must not be
- * deallocated until the caller calls @parport_unregister_device
- * for that device.
+ * The struct pardev_cb contains pointer to callbacks. preemption
+ * callback function, @preempt, is called when this device driver
+ * has claimed access to the port but another device driver wants
+ * to use it. It is given, @private, as its parameter, and should
+ * return zero if it is willing for the system to release the port
+ * to another driver on its behalf. If it wants to keep control of
+ * the port it should return non-zero, and no action will be taken.
+ * It is good manners for the driver to try to release the port at
+ * the earliest opportunity after its preemption callback rejects a
+ * preemption attempt. Note that if a preemption callback is happy
+ * for preemption to go ahead, there is no need to release the
+ * port; it is done automatically. This function may not block, as
+ * it may be called from interrupt context. If the device driver
+ * does not support preemption, @preempt can be %NULL.
*
- * The preemption callback function, @pf, is called when this
- * device driver has claimed access to the port but another
- * device driver wants to use it. It is given @handle as its
- * parameter, and should return zero if it is willing for the
- * system to release the port to another driver on its behalf.
- * If it wants to keep control of the port it should return
- * non-zero, and no action will be taken. It is good manners for
- * the driver to try to release the port at the earliest
- * opportunity after its preemption callback rejects a preemption
- * attempt. Note that if a preemption callback is happy for
- * preemption to go ahead, there is no need to release the port;
- * it is done automatically. This function may not block, as it
- * may be called from interrupt context. If the device driver
- * does not support preemption, @pf can be %NULL.
- *
- * The wake-up ("kick") callback function, @kf, is called when
+ * The wake-up ("kick") callback function, @wakeup, is called when
* the port is available to be claimed for exclusive access; that
* is, parport_claim() is guaranteed to succeed when called from
* inside the wake-up callback function. If the driver wants to
* claim the port it should do so; otherwise, it need not take
* any action. This function may not block, as it may be called
* from interrupt context. If the device driver does not want to
- * be explicitly invited to claim the port in this way, @kf can
+ * be explicitly invited to claim the port in this way, @wakeup can
* be %NULL.
*
* The interrupt handler, @irq_func, is called when an interrupt
@@ -712,138 +690,6 @@
**/
struct pardevice *
-parport_register_device(struct parport *port, const char *name,
- int (*pf)(void *), void (*kf)(void *),
- void (*irq_func)(void *),
- int flags, void *handle)
-{
- struct pardevice *tmp;
-
- if (port->physport->flags & PARPORT_FLAG_EXCL) {
- /* An exclusive device is registered. */
- printk(KERN_DEBUG "%s: no more devices allowed\n",
- port->name);
- return NULL;
- }
-
- if (flags & PARPORT_DEV_LURK) {
- if (!pf || !kf) {
- printk(KERN_INFO "%s: refused to register lurking device (%s) without callbacks\n", port->name, name);
- return NULL;
- }
- }
-
- if (flags & PARPORT_DEV_EXCL) {
- if (port->physport->devices) {
- /*
- * If a device is already registered and this new
- * device wants exclusive access, then no need to
- * continue as we can not grant exclusive access to
- * this device.
- */
- pr_err("%s: cannot grant exclusive access for device %s\n",
- port->name, name);
- return NULL;
- }
- }
-
- /*
- * We up our own module reference count, and that of the port
- * on which a device is to be registered, to ensure that
- * neither of us gets unloaded while we sleep in (e.g.)
- * kmalloc.
- */
- if (!try_module_get(port->ops->owner))
- return NULL;
-
- parport_get_port(port);
-
- tmp = kmalloc(sizeof(struct pardevice), GFP_KERNEL);
- if (!tmp)
- goto out;
-
- tmp->state = kmalloc(sizeof(struct parport_state), GFP_KERNEL);
- if (!tmp->state)
- goto out_free_pardevice;
-
- tmp->name = name;
- tmp->port = port;
- tmp->daisy = -1;
- tmp->preempt = pf;
- tmp->wakeup = kf;
- tmp->private = handle;
- tmp->flags = flags;
- tmp->irq_func = irq_func;
- tmp->waiting = 0;
- tmp->timeout = 5 * HZ;
- tmp->devmodel = false;
-
- /* Chain this onto the list */
- tmp->prev = NULL;
- /*
- * This function must not run from an irq handler so we don' t need
- * to clear irq on the local CPU. -arca
- */
- spin_lock(&port->physport->pardevice_lock);
-
- if (flags & PARPORT_DEV_EXCL) {
- if (port->physport->devices) {
- spin_unlock(&port->physport->pardevice_lock);
- printk(KERN_DEBUG
- "%s: cannot grant exclusive access for device %s\n",
- port->name, name);
- goto out_free_all;
- }
- port->flags |= PARPORT_FLAG_EXCL;
- }
-
- tmp->next = port->physport->devices;
- wmb(); /*
- * Make sure that tmp->next is written before it's
- * added to the list; see comments marked 'no locking
- * required'
- */
- if (port->physport->devices)
- port->physport->devices->prev = tmp;
- port->physport->devices = tmp;
- spin_unlock(&port->physport->pardevice_lock);
-
- init_waitqueue_head(&tmp->wait_q);
- tmp->timeslice = parport_default_timeslice;
- tmp->waitnext = tmp->waitprev = NULL;
-
- /*
- * This has to be run as last thing since init_state may need other
- * pardevice fields. -arca
- */
- port->ops->init_state(tmp, tmp->state);
- if (!test_and_set_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags)) {
- port->proc_device = tmp;
- parport_device_proc_register(tmp);
- }
- return tmp;
-
- out_free_all:
- kfree(tmp->state);
- out_free_pardevice:
- kfree(tmp);
- out:
- parport_put_port(port);
- module_put(port->ops->owner);
-
- return NULL;
-}
-EXPORT_SYMBOL(parport_register_device);
-
-static void free_pardevice(struct device *dev)
-{
- struct pardevice *par_dev = to_pardevice(dev);
-
- kfree(par_dev->name);
- kfree(par_dev);
-}
-
-struct pardevice *
parport_register_dev_model(struct parport *port, const char *name,
const struct pardev_cb *par_dev_cb, int id)
{
@@ -997,7 +843,7 @@
#ifdef PARPORT_PARANOID
if (!dev) {
- printk(KERN_ERR "parport_unregister_device: passed NULL\n");
+ pr_err("%s: passed NULL\n", __func__);
return;
}
#endif
@@ -1047,10 +893,7 @@
spin_unlock_irq(&port->waitlist_lock);
kfree(dev->state);
- if (dev->devmodel)
- device_unregister(&dev->dev);
- else
- kfree(dev);
+ device_unregister(&dev->dev);
module_put(port->ops->owner);
parport_put_port(port);
@@ -1138,8 +981,7 @@
unsigned long flags;
if (port->cad == dev) {
- printk(KERN_INFO "%s: %s already owner\n",
- dev->port->name,dev->name);
+ pr_info("%s: %s already owner\n", dev->port->name, dev->name);
return 0;
}
@@ -1159,9 +1001,8 @@
* I think we'll actually deadlock rather than
* get here, but just in case..
*/
- printk(KERN_WARNING
- "%s: %s released port when preempted!\n",
- port->name, oldcad->name);
+ pr_warn("%s: %s released port when preempted!\n",
+ port->name, oldcad->name);
if (port->cad)
goto blocked;
}
@@ -1261,7 +1102,8 @@
r = parport_claim(dev);
if (r == -EAGAIN) {
#ifdef PARPORT_DEBUG_SHARING
- printk(KERN_DEBUG "%s: parport_claim() returned -EAGAIN\n", dev->name);
+ printk(KERN_DEBUG "%s: parport_claim() returned -EAGAIN\n",
+ dev->name);
#endif
/*
* FIXME!!! Use the proper locking for dev->waiting,
@@ -1294,7 +1136,7 @@
if (dev->port->physport->cad != dev)
printk(KERN_DEBUG "%s: exiting parport_claim_or_block but %s owns port!\n",
dev->name, dev->port->physport->cad ?
- dev->port->physport->cad->name:"nobody");
+ dev->port->physport->cad->name : "nobody");
#endif
}
dev->waiting = 0;
@@ -1321,8 +1163,8 @@
write_lock_irqsave(&port->cad_lock, flags);
if (port->cad != dev) {
write_unlock_irqrestore(&port->cad_lock, flags);
- printk(KERN_WARNING "%s: %s tried to release parport when not owner\n",
- port->name, dev->name);
+ pr_warn("%s: %s tried to release parport when not owner\n",
+ port->name, dev->name);
return;
}
@@ -1362,7 +1204,8 @@
if (dev->port->cad) /* racy but no matter */
return;
} else {
- printk(KERN_ERR "%s: don't know how to wake %s\n", port->name, pd->name);
+ pr_err("%s: don't know how to wake %s\n",
+ port->name, pd->name);
}
}