pcmcia: deprecate CS_IN_USE

If a resource is already in use, mark it with -EBUSY. Same for cards already
asleep.

(includes a fix for a bug found by Larry Finger -- thanks!)
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

3 files changed, 33 insertions, 18 deletions

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index f9424801b9c8..1c6c8c8f57c9 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -534,7 +534,7 @@ static int socket_insert(struct pcmcia_socket *skt)
 static int socket_suspend(struct pcmcia_socket *skt)
 {
         if (skt->state & SOCKET_SUSPEND)
-                return CS_IN_USE;
+                return -EBUSY;
 
         send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
         skt->socket = dead_socket;
@@ -556,7 +556,7 @@ static int socket_resume(struct pcmcia_socket *skt)
         int ret;
 
         if (!(skt->state & SOCKET_SUSPEND))
-                return CS_IN_USE;
+                return -EBUSY;
 
         skt->socket = dead_socket;
         skt->ops->init(skt);
@@ -765,7 +765,7 @@ int pccard_reset_card(struct pcmcia_socket *skt)
                         break;
                 }
                 if (skt->state & SOCKET_SUSPEND) {
-                        ret = CS_IN_USE;
+                        ret = -EBUSY;
                         break;
                 }
                 if (skt->state & SOCKET_CARDBUS) {
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index 0ac3ea92a1c5..670465d4aac2 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -609,23 +609,30 @@ int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
         c = p_dev->function_config;
         if (c->state & CONFIG_LOCKED)
                 return -EACCES;
-        if (c->state & CONFIG_IO_REQ)
-                return CS_IN_USE;
+        if (c->state & CONFIG_IO_REQ) {
+                ds_dbg(s, 0, "IO already configured\n");
+                return -EBUSY;
+        }
         if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
                 return CS_BAD_ATTRIBUTE;
         if ((req->NumPorts2 > 0) &&
             (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
                 return CS_BAD_ATTRIBUTE;
 
+        ds_dbg(s, 1, "trying to allocate resource 1\n");
         if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
-                           req->NumPorts1, req->IOAddrLines))
-                return CS_IN_USE;
+                           req->NumPorts1, req->IOAddrLines)) {
+                ds_dbg(s, 0, "allocation of resource 1 failed\n");
+                return -EBUSY;
+        }
 
         if (req->NumPorts2) {
+                ds_dbg(s, 1, "trying to allocate resource 2\n");
                 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
                                    req->NumPorts2, req->IOAddrLines)) {
+                        ds_dbg(s, 0, "allocation of resource 2 failed\n");
                         release_io_space(s, req->BasePort1, req->NumPorts1);
-                        return CS_IN_USE;
+                        return -EBUSY;
                 }
         }
 
@@ -658,7 +665,7 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
 {
         struct pcmcia_socket *s = p_dev->socket;
         config_t *c;
-        int ret = CS_IN_USE, irq = 0;
+        int ret = -EINVAL, irq = 0;
         int type;
 
         if (!(s->state & SOCKET_PRESENT))
@@ -666,8 +673,10 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
         c = p_dev->function_config;
         if (c->state & CONFIG_LOCKED)
                 return -EACCES;
-        if (c->state & CONFIG_IRQ_REQ)
-                return CS_IN_USE;
+        if (c->state & CONFIG_IRQ_REQ) {
+                ds_dbg(s, 0, "IRQ already configured\n");
+                return -EBUSY;
+        }
 
         /* Decide what type of interrupt we are registering */
         type = 0;
@@ -730,8 +739,10 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
         }
 
         if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
-                if (request_irq(irq, req->Handler, type,  p_dev->devname, req->Instance))
-                        return CS_IN_USE;
+                ret = request_irq(irq, req->Handler, type,
+                                  p_dev->devname, req->Instance);
+                if (ret)
+                        return ret;
         }
 
         /* Make sure the fact the request type was overridden is passed back */
@@ -792,8 +803,10 @@ int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_h
         /* Allocate system memory window */
         for (w = 0; w < MAX_WIN; w++)
                 if (!(s->state & SOCKET_WIN_REQ(w))) break;
-        if (w == MAX_WIN)
-                return CS_IN_USE;
+        if (w == MAX_WIN) {
+                ds_dbg(s, 0, "all windows are used already\n");
+                return -EINVAL;
+        }
 
         win = &s->win[w];
         win->magic = WINDOW_MAGIC;
@@ -804,8 +817,10 @@ int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_h
         if (!(s->features & SS_CAP_STATIC_MAP)) {
                 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
                                                       (req->Attributes & WIN_MAP_BELOW_1MB), s);
-                if (!win->ctl.res)
-                        return CS_IN_USE;
+                if (!win->ctl.res) {
+                        ds_dbg(s, 0, "allocating mem region failed\n");
+                        return -EINVAL;
+                }
         }
         (*p_dev)->_win |= CLIENT_WIN_REQ(w);
 
diff --git a/include/pcmcia/cs.h b/include/pcmcia/cs.h
index a517a5845af0..2dc1411b27c9 100644
--- a/include/pcmcia/cs.h
+++ b/include/pcmcia/cs.h
@@ -314,7 +314,7 @@ typedef struct error_info_t {
 #define CS_BAD_ARG_LENGTH       -ENODEV
 #define CS_BAD_ARGS             0x1c
 #define CS_CONFIGURATION_LOCKED -EACCES
-#define CS_IN_USE               0x1e
+#define CS_IN_USE               -EBUSY
 #define CS_NO_MORE_ITEMS        0x1f
 #define CS_OUT_OF_RESOURCE      -ENOMEM
 #define CS_BAD_HANDLE           -EINVAL