pcmcia: Change window_handle_t logic to unsigned long
Logic changes based on top of the other patches:
This set of patches changed window_handle_t from being a pointer to an
unsigned long. The unsigned long is now a simple index into socket->win[].
Going from a pointer to unsigned long should leave the user space interface
unchanged unless I'm mistaken.
This change results in code that is less error prone and a user space
interface which is much cleaner and safer. A nice side effect is that we
are also are able to remove all members except one from window_t.
[ linux@dominikbrodowski.net:
Update to 2.6.31. Also, a plain "index" to socket->win[] does not
work, as several codepaths rely on "window_handle_t" being
non-zero if used. Therefore, set the window_handle_t to the
socket->win[] index + 1. ]
CC: netdev@vger.kernel.org
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index a092749..ae6abc7 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -187,15 +187,19 @@
/** pcmcia_get_window
*/
-int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
- int idx, win_req_t *req)
+int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *wh_out,
+ window_handle_t wh, win_req_t *req)
{
window_t *win;
- int w;
+ window_handle_t w;
if (!s || !(s->state & SOCKET_PRESENT))
return -ENODEV;
- for (w = idx; w < MAX_WIN; w++)
+
+ wh--;
+ if (wh >= MAX_WIN)
+ return -EINVAL;
+ for (w = wh; w < MAX_WIN; w++)
if (s->state & SOCKET_WIN_REQ(w))
break;
if (w == MAX_WIN)
@@ -213,7 +217,8 @@
req->Attributes |= WIN_DATA_WIDTH_16;
if (win->ctl.flags & MAP_USE_WAIT)
req->Attributes |= WIN_USE_WAIT;
- *handle = win;
+
+ *wh_out = w++;
return 0;
} /* pcmcia_get_window */
EXPORT_SYMBOL(pcmcia_get_window);
@@ -226,12 +231,12 @@
int pcmcia_get_mem_page(struct pcmcia_socket *skt, window_handle_t wh,
memreq_t *req)
{
- window_handle_t win = wh;
-
- if ((win == NULL) || (win->magic != WINDOW_MAGIC))
+ wh--;
+ if (wh >= MAX_WIN)
return -EINVAL;
+
req->Page = 0;
- req->CardOffset = win->ctl.card_start;
+ req->CardOffset = skt->win[wh].ctl.card_start;
return 0;
} /* pcmcia_get_mem_page */
EXPORT_SYMBOL(pcmcia_get_mem_page);
@@ -240,18 +245,17 @@
int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
memreq_t *req)
{
- struct pcmcia_socket *s;
- window_handle_t win = wh;
+ struct pcmcia_socket *s = p_dev->socket;
- if ((win == NULL) || (win->magic != WINDOW_MAGIC))
+ wh--;
+ if (wh >= MAX_WIN)
return -EINVAL;
- s = win->sock;
if (req->Page != 0) {
dev_dbg(&s->dev, "failure: requested page is zero\n");
return -EINVAL;
}
- win->ctl.card_start = req->CardOffset;
- if (s->ops->set_mem_map(s, &win->ctl) != 0) {
+ s->win[wh].ctl.card_start = req->CardOffset;
+ if (s->ops->set_mem_map(s, &s->win[wh].ctl) != 0) {
dev_dbg(&s->dev, "failed to set_mem_map\n");
return -EIO;
}
@@ -450,13 +454,16 @@
int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh)
{
- struct pcmcia_socket *s;
- window_handle_t win = wh;
+ struct pcmcia_socket *s = p_dev->socket;
+ window_t *win;
- if ((win == NULL) || (win->magic != WINDOW_MAGIC))
+ wh--;
+ if (wh >= MAX_WIN)
return -EINVAL;
- s = win->sock;
- if (!(win->handle->_win & CLIENT_WIN_REQ(win->index))) {
+
+ win = &s->win[wh];
+
+ if (!(p_dev->_win & CLIENT_WIN_REQ(wh))) {
dev_dbg(&s->dev, "not releasing unknown window\n");
return -EINVAL;
}
@@ -464,7 +471,7 @@
/* Shut down memory window */
win->ctl.flags &= ~MAP_ACTIVE;
s->ops->set_mem_map(s, &win->ctl);
- s->state &= ~SOCKET_WIN_REQ(win->index);
+ s->state &= ~SOCKET_WIN_REQ(wh);
/* Release system memory */
if (win->ctl.res) {
@@ -472,9 +479,7 @@
kfree(win->ctl.res);
win->ctl.res = NULL;
}
- win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
-
- win->magic = 0;
+ p_dev->_win &= ~CLIENT_WIN_REQ(wh);
return 0;
} /* pcmcia_release_window */
@@ -847,10 +852,6 @@
}
win = &s->win[w];
- win->magic = WINDOW_MAGIC;
- win->index = w;
- win->handle = *p_dev;
- win->sock = s;
if (!(s->features & SS_CAP_STATIC_MAP)) {
win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
@@ -887,7 +888,7 @@
} else {
req->Base = win->ctl.res->start;
}
- *wh = win;
+ *wh = w + 1;
return 0;
} /* pcmcia_request_window */