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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.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index e0b09e71d5c..60d428be0b0 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;
}