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[PATCH] pcmcia: CIS overrid via sysfs 

The one thing which surprises me in this patch that cis->Length needs to be
set to count+1.  Without it, it doesn't work, but with it, it doesn't make
sense to me.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
hifive-unleashed-5.1
Dominik Brodowski 2005-06-27 16:28:09 -07:00 committed by Linus Torvalds
parent 7f299bccb4
commit ff1fa9ef3c
3 changed files with 53 additions and 1 deletions
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1
drivers/pcmcia/cs_internal.h
View File

@ -160,6 +160,7 @@ struct pcmcia_callback{
struct module *owner;
int (*event) (struct pcmcia_socket *s, event_t event, int priority);
int (*resources_done) (struct pcmcia_socket *s);
void (*replace_cis) (void);
};
int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c);

6
drivers/pcmcia/ds.c
View File

@ -653,6 +653,11 @@ static inline void pcmcia_add_pseudo_device(struct pcmcia_bus_socket *s)
return;
}
static void pcmcia_bus_rescan(void)
{
/* must be called with skt_sem held */
bus_rescan_devices(&pcmcia_bus_type);
}
static inline int pcmcia_devmatch(struct pcmcia_device *dev,
struct pcmcia_device_id *did)
@ -1766,6 +1771,7 @@ static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
s->callback.owner = THIS_MODULE;
s->callback.event = &ds_event;
s->callback.resources_done = &pcmcia_card_add;
s->callback.replace_cis = &pcmcia_bus_rescan;
socket->pcmcia = s;
ret = pccard_register_pcmcia(socket, &s->callback);

47
drivers/pcmcia/socket_sysfs.c
View File

@ -282,6 +282,50 @@ static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size
return (count);
}
static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
{
struct pcmcia_socket *s = to_socket(container_of(kobj, struct class_device, kobj));
cisdump_t *cis;
ssize_t ret = count;
if (off)
return -EINVAL;
if (count >= 0x200)
return -EINVAL;
if (!(s->state & SOCKET_PRESENT))
return -ENODEV;
cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
if (!cis)
return -ENOMEM;
memset(cis, 0, sizeof(cisdump_t));
cis->Length = count + 1;
memcpy(cis->Data, buf, count);
if (pcmcia_replace_cis(s, cis))
ret = -EIO;
kfree(cis);
if (!ret) {
down(&s->skt_sem);
if ((s->callback) && (s->state & SOCKET_PRESENT) &&
!(s->state & SOCKET_CARDBUS)) {
if (try_module_get(s->callback->owner)) {
s->callback->replace_cis();
module_put(s->callback->owner);
}
}
up(&s->skt_sem);
}
return (ret);
}
static struct class_device_attribute *pccard_socket_attributes[] = {
&class_device_attr_card_type,
@ -296,9 +340,10 @@ static struct class_device_attribute *pccard_socket_attributes[] = {
};
static struct bin_attribute pccard_cis_attr = {
.attr = { .name = "cis", .mode = S_IRUGO, .owner = THIS_MODULE},
.attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR, .owner = THIS_MODULE},
.size = 0x200,
.read = pccard_show_cis,
.write = pccard_store_cis,
};
static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev)