Commit 360b65b9 authored by Dominik Brodowski's avatar Dominik Brodowski

[PATCH] pcmcia: make config_t independent, add reference counting

Handle config_t structs independent of struct pcmcia_socket, and add
reference counting for them.
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 855cdf13
......@@ -406,8 +406,6 @@ static void socket_shutdown(struct pcmcia_socket *s)
cb_free(s);
#endif
s->functions = 0;
kfree(s->config);
s->config = NULL;
s->ops->get_status(s, &status);
if (status & SS_POWERON) {
......
......@@ -16,6 +16,7 @@
#define _LINUX_CS_INTERNAL_H
#include <linux/config.h>
#include <linux/kref.h>
/* Flags in client state */
#define CLIENT_CONFIG_LOCKED 0x0001
......@@ -40,6 +41,7 @@ typedef struct region_t {
/* Each card function gets one of these guys */
typedef struct config_t {
struct kref ref;
u_int state;
u_int Attributes;
u_int IntType;
......
......@@ -23,6 +23,7 @@
#include <linux/workqueue.h>
#include <linux/crc32.h>
#include <linux/firmware.h>
#include <linux/kref.h>
#define IN_CARD_SERVICES
#include <pcmcia/cs_types.h>
......@@ -343,12 +344,19 @@ void pcmcia_put_dev(struct pcmcia_device *p_dev)
put_device(&p_dev->dev);
}
static void pcmcia_release_function(struct kref *ref)
{
struct config_t *c = container_of(ref, struct config_t, ref);
kfree(c);
}
static void pcmcia_release_dev(struct device *dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
ds_dbg(1, "releasing dev %p\n", p_dev);
pcmcia_put_socket(p_dev->socket);
kfree(p_dev->devname);
kref_put(&p_dev->function_config->ref, pcmcia_release_function);
kfree(p_dev);
}
......@@ -377,30 +385,14 @@ static int pcmcia_device_probe(struct device * dev)
p_drv = to_pcmcia_drv(dev->driver);
s = p_dev->socket;
if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
if ((!p_drv->probe) || (!p_dev->function_config) ||
(!try_module_get(p_drv->owner))) {
ret = -EINVAL;
goto put_dev;
}
p_dev->state &= ~CLIENT_UNBOUND;
/* set up the device configuration, if it hasn't been done before */
if (!s->functions) {
cistpl_longlink_mfc_t mfc;
if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
&mfc) == CS_SUCCESS)
s->functions = mfc.nfn;
else
s->functions = 1;
s->config = kzalloc(sizeof(config_t) * s->functions,
GFP_KERNEL);
if (!s->config) {
ret = -ENOMEM;
goto put_module;
}
}
p_dev->function_config = &s->config[p_dev->func];
ret = p_drv->probe(p_dev);
if (ret)
goto put_module;
......@@ -576,7 +568,7 @@ static DECLARE_MUTEX(device_add_lock);
struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
{
struct pcmcia_device *p_dev;
struct pcmcia_device *p_dev, *tmp_dev;
unsigned long flags;
int bus_id_len;
......@@ -597,6 +589,8 @@ struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int f
p_dev->socket = s;
p_dev->device_no = (s->device_count++);
p_dev->func = function;
if (s->functions < function)
s->functions = function;
p_dev->dev.bus = &pcmcia_bus_type;
p_dev->dev.parent = s->dev.dev;
......@@ -611,28 +605,50 @@ struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int f
/* compat */
p_dev->state = CLIENT_UNBOUND;
/* Add to the list in pcmcia_bus_socket */
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
/*
* p_dev->function_config must be the same for all card functions.
* Note that this is serialized by the device_add_lock, so that
* only one such struct will be created.
*/
list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
if (p_dev->func == tmp_dev->func) {
p_dev->function_config = tmp_dev->function_config;
kref_get(&p_dev->function_config->ref);
}
/* Add to the list in pcmcia_bus_socket */
list_add_tail(&p_dev->socket_device_list, &s->devices_list);
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
if (!p_dev->function_config) {
p_dev->function_config = kzalloc(sizeof(struct config_t),
GFP_KERNEL);
if (!p_dev->function_config)
goto err_unreg;
kref_init(&p_dev->function_config->ref);
}
printk(KERN_NOTICE "pcmcia: registering new device %s\n",
p_dev->devname);
pcmcia_device_query(p_dev);
if (device_register(&p_dev->dev)) {
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
list_del(&p_dev->socket_device_list);
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
goto err_free;
}
if (device_register(&p_dev->dev))
goto err_unreg;
up(&device_add_lock);
return p_dev;
err_unreg:
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
list_del(&p_dev->socket_device_list);
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
err_free:
kfree(p_dev->devname);
kfree(p_dev);
......
......@@ -186,7 +186,6 @@ struct pcmcia_socket {
u_short lock_count;
pccard_mem_map cis_mem;
void __iomem *cis_virt;
struct config_t *config;
struct {
u_int AssignedIRQ;
u_int Config;
......
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