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path: root/drivers/pcmcia/cistpl.c
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Diffstat (limited to 'drivers/pcmcia/cistpl.c')
-rw-r--r--drivers/pcmcia/cistpl.c130
1 files changed, 16 insertions, 114 deletions
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index f230f6543bff..60d428be0b07 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -129,6 +129,8 @@ static void __iomem *set_cis_map(struct pcmcia_socket *s,
/**
* pcmcia_read_cis_mem() - low-level function to read CIS memory
+ *
+ * must be called with ops_mutex held
*/
int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
u_int len, void *ptr)
@@ -138,7 +140,6 @@ int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
dev_dbg(&s->dev, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
- mutex_lock(&s->ops_mutex);
if (attr & IS_INDIRECT) {
/* Indirect accesses use a bunch of special registers at fixed
locations in common memory */
@@ -153,7 +154,6 @@ int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
if (!sys) {
dev_dbg(&s->dev, "could not map memory\n");
memset(ptr, 0xff, len);
- mutex_unlock(&s->ops_mutex);
return -1;
}
@@ -184,7 +184,6 @@ int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
if (!sys) {
dev_dbg(&s->dev, "could not map memory\n");
memset(ptr, 0xff, len);
- mutex_unlock(&s->ops_mutex);
return -1;
}
end = sys + s->map_size;
@@ -198,7 +197,6 @@ int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
addr = 0;
}
}
- mutex_unlock(&s->ops_mutex);
dev_dbg(&s->dev, " %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
*(u_char *)(ptr+0), *(u_char *)(ptr+1),
*(u_char *)(ptr+2), *(u_char *)(ptr+3));
@@ -209,7 +207,8 @@ int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
/**
* pcmcia_write_cis_mem() - low-level function to write CIS memory
*
- * Probably only useful for writing one-byte registers.
+ * Probably only useful for writing one-byte registers. Must be called
+ * with ops_mutex held.
*/
void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
u_int len, void *ptr)
@@ -220,7 +219,6 @@ void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
dev_dbg(&s->dev,
"pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len);
- mutex_lock(&s->ops_mutex);
if (attr & IS_INDIRECT) {
/* Indirect accesses use a bunch of special registers at fixed
locations in common memory */
@@ -234,7 +232,6 @@ void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
((cis_width) ? MAP_16BIT : 0));
if (!sys) {
dev_dbg(&s->dev, "could not map memory\n");
- mutex_unlock(&s->ops_mutex);
return; /* FIXME: Error */
}
@@ -260,7 +257,6 @@ void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
sys = set_cis_map(s, card_offset, flags);
if (!sys) {
dev_dbg(&s->dev, "could not map memory\n");
- mutex_unlock(&s->ops_mutex);
return; /* FIXME: error */
}
@@ -275,7 +271,6 @@ void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
addr = 0;
}
}
- mutex_unlock(&s->ops_mutex);
}
@@ -314,7 +309,6 @@ static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
return 0;
}
}
- mutex_unlock(&s->ops_mutex);
ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
@@ -326,11 +320,11 @@ static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
cis->len = len;
cis->attr = attr;
memcpy(cis->cache, ptr, len);
- mutex_lock(&s->ops_mutex);
list_add(&cis->node, &s->cis_cache);
- mutex_unlock(&s->ops_mutex);
}
}
+ mutex_unlock(&s->ops_mutex);
+
return ret;
}
@@ -386,6 +380,7 @@ int verify_cis_cache(struct pcmcia_socket *s)
"no memory for verifying CIS\n");
return -ENOMEM;
}
+ mutex_lock(&s->ops_mutex);
list_for_each_entry(cis, &s->cis_cache, node) {
int len = cis->len;
@@ -395,10 +390,12 @@ int verify_cis_cache(struct pcmcia_socket *s)
ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
if (ret || memcmp(buf, cis->cache, len) != 0) {
kfree(buf);
+ mutex_unlock(&s->ops_mutex);
return -1;
}
}
kfree(buf);
+ mutex_unlock(&s->ops_mutex);
return 0;
}
@@ -1362,106 +1359,6 @@ EXPORT_SYMBOL(pcmcia_parse_tuple);
/**
- * pccard_read_tuple() - internal CIS tuple access
- * @s: the struct pcmcia_socket where the card is inserted
- * @function: the device function we loop for
- * @code: which CIS code shall we look for?
- * @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
- *
- * pccard_read_tuple() reads out one tuple and attempts to parse it
- */
-int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function,
- cisdata_t code, void *parse)
-{
- tuple_t tuple;
- cisdata_t *buf;
- int ret;
-
- buf = kmalloc(256, GFP_KERNEL);
- if (buf == NULL) {
- dev_printk(KERN_WARNING, &s->dev, "no memory to read tuple\n");
- return -ENOMEM;
- }
- tuple.DesiredTuple = code;
- tuple.Attributes = 0;
- if (function == BIND_FN_ALL)
- tuple.Attributes = TUPLE_RETURN_COMMON;
- ret = pccard_get_first_tuple(s, function, &tuple);
- if (ret != 0)
- goto done;
- tuple.TupleData = buf;
- tuple.TupleOffset = 0;
- tuple.TupleDataMax = 255;
- ret = pccard_get_tuple_data(s, &tuple);
- if (ret != 0)
- goto done;
- ret = pcmcia_parse_tuple(&tuple, parse);
-done:
- kfree(buf);
- return ret;
-}
-
-
-/**
- * pccard_loop_tuple() - loop over tuples in the CIS
- * @s: the struct pcmcia_socket where the card is inserted
- * @function: the device function we loop for
- * @code: which CIS code shall we look for?
- * @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
- * @priv_data: private data to be passed to the loop_tuple function.
- * @loop_tuple: function to call for each CIS entry of type @function. IT
- * gets passed the raw tuple, the paresed tuple (if @parse is
- * set) and @priv_data.
- *
- * pccard_loop_tuple() loops over all CIS entries of type @function, and
- * calls the @loop_tuple function for each entry. If the call to @loop_tuple
- * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
- */
-int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
- cisdata_t code, cisparse_t *parse, void *priv_data,
- int (*loop_tuple) (tuple_t *tuple,
- cisparse_t *parse,
- void *priv_data))
-{
- tuple_t tuple;
- cisdata_t *buf;
- int ret;
-
- buf = kzalloc(256, GFP_KERNEL);
- if (buf == NULL) {
- dev_printk(KERN_WARNING, &s->dev, "no memory to read tuple\n");
- return -ENOMEM;
- }
-
- tuple.TupleData = buf;
- tuple.TupleDataMax = 255;
- tuple.TupleOffset = 0;
- tuple.DesiredTuple = code;
- tuple.Attributes = 0;
-
- ret = pccard_get_first_tuple(s, function, &tuple);
- while (!ret) {
- if (pccard_get_tuple_data(s, &tuple))
- goto next_entry;
-
- if (parse)
- if (pcmcia_parse_tuple(&tuple, parse))
- goto next_entry;
-
- ret = loop_tuple(&tuple, parse, priv_data);
- if (!ret)
- break;
-
-next_entry:
- ret = pccard_get_next_tuple(s, function, &tuple);
- }
-
- kfree(buf);
- return ret;
-}
-
-
-/**
* pccard_validate_cis() - check whether card has a sensible CIS
* @s: the struct pcmcia_socket we are to check
* @info: returns the number of tuples in the (valid) CIS, or 0
@@ -1484,6 +1381,11 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
if (!s)
return -EINVAL;
+ if (s->functions) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
/* We do not want to validate the CIS cache... */
mutex_lock(&s->ops_mutex);
destroy_cis_cache(s);
@@ -1639,7 +1541,7 @@ static ssize_t pccard_show_cis(struct kobject *kobj,
count = 0;
else {
struct pcmcia_socket *s;
- unsigned int chains;
+ unsigned int chains = 1;
if (off + count > size)
count = size - off;
@@ -1648,7 +1550,7 @@ static ssize_t pccard_show_cis(struct kobject *kobj,
if (!(s->state & SOCKET_PRESENT))
return -ENODEV;
- if (pccard_validate_cis(s, &chains))
+ if (!s->functions && pccard_validate_cis(s, &chains))
return -EIO;
if (!chains)
return -ENODATA;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 03:38:34 +0100