USB: clean up some host controller sparse warnings

Fix usb sparse warnings:

drivers/usb/host/isp1362-hcd.c:2220:50: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:43:24: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:49:24: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:161:24: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:198:16: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:319:31: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:1231:33: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-pci.c:177:23: warning: non-ANSI function declaration of function 'xhci_register_pci'
drivers/usb/host/xhci-pci.c:182:26: warning: non-ANSI function declaration of function 'xhci_unregister_pci'
drivers/usb/host/xhci-ring.c:342:32: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-ring.c:525:34: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-ring.c:1009:32: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-ring.c:1031:32: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-ring.c:1041:16: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-ring.c:1096:30: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-ring.c:1100:27: warning: Using plain integer as NULL pointer
drivers/usb/host/xhci-mem.c:224:27: warning: symbol 'xhci_alloc_container_ctx' was not declared. Should it be static?
drivers/usb/host/xhci-mem.c:242:6: warning: symbol 'xhci_free_container_ctx' was not declared. Should it be static?

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Lothar Wassmann <LW@KARO-electronics.de>
Signed-off By: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 18 insertions, 18 deletions

diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index 6a6a50849bf..20a0dfe0fe3 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -2217,7 +2217,7 @@ static void create_debug_file(struct isp1362_hcd *isp1362_hcd)
 static void remove_debug_file(struct isp1362_hcd *isp1362_hcd)
 {
         if (isp1362_hcd->pde)
-                remove_proc_entry(proc_filename, 0);
+                remove_proc_entry(proc_filename, NULL);
 }
 
 #endif
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 5711048708d..4df752cb0f7 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -41,13 +41,13 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, gfp_t flag
 
         seg = kzalloc(sizeof *seg, flags);
         if (!seg)
-                return 0;
+                return NULL;
         xhci_dbg(xhci, "Allocating priv segment structure at %p\n", seg);
 
         seg->trbs = dma_pool_alloc(xhci->segment_pool, flags, &dma);
         if (!seg->trbs) {
                 kfree(seg);
-                return 0;
+                return NULL;
         }
         xhci_dbg(xhci, "// Allocating segment at %p (virtual) 0x%llx (DMA)\n",
                         seg->trbs, (unsigned long long)dma);
@@ -159,7 +159,7 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
         ring = kzalloc(sizeof *(ring), flags);
         xhci_dbg(xhci, "Allocating ring at %p\n", ring);
         if (!ring)
-                return 0;
+                return NULL;
 
         INIT_LIST_HEAD(&ring->td_list);
         if (num_segs == 0)
@@ -196,7 +196,7 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
 
 fail:
         xhci_ring_free(xhci, ring);
-        return 0;
+        return NULL;
 }
 
 void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci,
@@ -247,7 +247,7 @@ static void xhci_reinit_cached_ring(struct xhci_hcd *xhci,
 
 #define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32)
 
-struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
+static struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
                                                     int type, gfp_t flags)
 {
         struct xhci_container_ctx *ctx = kzalloc(sizeof(*ctx), flags);
@@ -265,7 +265,7 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
         return ctx;
 }
 
-void xhci_free_container_ctx(struct xhci_hcd *xhci,
+static void xhci_free_container_ctx(struct xhci_hcd *xhci,
                              struct xhci_container_ctx *ctx)
 {
         if (!ctx)
@@ -764,7 +764,7 @@ void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
                 xhci_free_container_ctx(xhci, dev->out_ctx);
 
         kfree(xhci->devs[slot_id]);
-        xhci->devs[slot_id] = 0;
+        xhci->devs[slot_id] = NULL;
 }
 
 int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
@@ -1779,7 +1779,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
          */
         init_completion(&xhci->addr_dev);
         for (i = 0; i < MAX_HC_SLOTS; ++i)
-                xhci->devs[i] = 0;
+                xhci->devs[i] = NULL;
 
         if (scratchpad_alloc(xhci, flags))
                 goto fail;
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index d295bbc15eb..edffd81fc25 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -177,12 +177,12 @@ static struct pci_driver xhci_pci_driver = {
         .shutdown =     usb_hcd_pci_shutdown,
 };
 
-int xhci_register_pci()
+int xhci_register_pci(void)
 {
         return pci_register_driver(&xhci_pci_driver);
 }
 
-void xhci_unregister_pci()
+void xhci_unregister_pci(void)
 {
         pci_unregister_driver(&xhci_pci_driver);
 }
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 16ef5fd77ce..9e27eb0c700 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -388,7 +388,7 @@ static struct xhci_segment *find_trb_seg(
                 cur_seg = cur_seg->next;
                 if (cur_seg == start_seg)
                         /* Looped over the entire list.  Oops! */
-                        return 0;
+                        return NULL;
         }
         return cur_seg;
 }
@@ -582,7 +582,7 @@ static void handle_stopped_endpoint(struct xhci_hcd *xhci,
         struct xhci_ring *ep_ring;
         struct xhci_virt_ep *ep;
         struct list_head *entry;
-        struct xhci_td *cur_td = 0;
+        struct xhci_td *cur_td = NULL;
         struct xhci_td *last_unlinked_td;
 
         struct xhci_dequeue_state deq_state;
@@ -1115,7 +1115,7 @@ struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
 
         do {
                 if (start_dma == 0)
-                        return 0;
+                        return NULL;
                 /* We may get an event for a Link TRB in the middle of a TD */
                 end_seg_dma = xhci_trb_virt_to_dma(cur_seg,
                                 &cur_seg->trbs[TRBS_PER_SEGMENT - 1]);
@@ -1137,7 +1137,7 @@ struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
                                                  suspect_dma <= end_trb_dma))
                                         return cur_seg;
                         }
-                        return 0;
+                        return NULL;
                 } else {
                         /* Might still be somewhere in this segment */
                         if (suspect_dma >= start_dma && suspect_dma <= end_seg_dma)
@@ -1147,7 +1147,7 @@ struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
                 start_dma = xhci_trb_virt_to_dma(cur_seg, &cur_seg->trbs[0]);
         } while (cur_seg != start_seg);
 
-        return 0;
+        return NULL;
 }
 
 static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci,
@@ -1223,11 +1223,11 @@ static int handle_tx_event(struct xhci_hcd *xhci,
         struct xhci_ring *ep_ring;
         unsigned int slot_id;
         int ep_index;
-        struct xhci_td *td = 0;
+        struct xhci_td *td = NULL;
         dma_addr_t event_dma;
         struct xhci_segment *event_seg;
         union xhci_trb *event_trb;
-        struct urb *urb = 0;
+        struct urb *urb = NULL;
         int status = -EINPROGRESS;
         struct xhci_ep_ctx *ep_ctx;
         u32 trb_comp_code;