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path: root/drivers/pcmcia/rsrc_nonstatic.c
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Diffstat (limited to 'drivers/pcmcia/rsrc_nonstatic.c')
-rw-r--r--drivers/pcmcia/rsrc_nonstatic.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 91626c1..1de46cf 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -274,17 +274,21 @@ static int readable(struct pcmcia_socket *s, struct resource *res,
{
int ret = -EINVAL;
+ mutex_lock(&s->ops_mutex);
s->cis_mem.res = res;
s->cis_virt = ioremap(res->start, s->map_size);
if (s->cis_virt) {
+ mutex_unlock(&s->ops_mutex);
/* as we're only called from pcmcia.c, we're safe */
if (s->callback->validate)
ret = s->callback->validate(s, count);
/* invalidate mapping */
+ mutex_lock(&s->ops_mutex);
iounmap(s->cis_virt);
s->cis_virt = NULL;
}
s->cis_mem.res = NULL;
+ mutex_unlock(&s->ops_mutex);
if ((ret) || (*count == 0))
return -EINVAL;
return 0;
@@ -300,6 +304,8 @@ static int checksum(struct pcmcia_socket *s, struct resource *res,
int i, a = 0, b = -1, d;
void __iomem *virt;
+ mutex_lock(&s->ops_mutex);
+
virt = ioremap(res->start, s->map_size);
if (virt) {
map.map = 0;
@@ -322,6 +328,8 @@ static int checksum(struct pcmcia_socket *s, struct resource *res,
iounmap(virt);
}
+ mutex_unlock(&s->ops_mutex);
+
if (b == -1)
return -EINVAL;
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