[PARISC] Cleanup whitespace and handle proc_mkdir() failures in pci-dma.c

1) cleanup whitespace and handle proc_mkdir() failures.
   From: Christophe Lucas <clucas@rotomalug.org>

2) rename "dino" entry to "pcxl_dma"...also seems like it's in
   the wrong location.

3) don't dump resource bitmap in /proc/pcxl_dma output

4) fixup compiler warning

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

1 files changed, 30 insertions, 18 deletions

diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c
index 368cc095c99f..d9b447cb1a0d 100644
--- a/arch/parisc/kernel/pci-dma.c
+++ b/arch/parisc/kernel/pci-dma.c
@@ -31,7 +31,7 @@
 #include <asm/page.h>   /* get_order */
 #include <asm/pgalloc.h>
 #include <asm/uaccess.h>
-
+#include <asm/tlbflush.h>       /* for purge_tlb_*() macros */
 
 static struct proc_dir_entry * proc_gsc_root = NULL;
 static int pcxl_proc_info(char *buffer, char **start, off_t offset, int length);
@@ -333,18 +333,28 @@ pcxl_free_range(unsigned long vaddr, size_t size)
 static int __init
 pcxl_dma_init(void)
 {
-    if (pcxl_dma_start == 0)
-        return 0;
+        if (pcxl_dma_start == 0)
+                return 0;
 
-    spin_lock_init(&pcxl_res_lock);
-    pcxl_res_size = PCXL_DMA_MAP_SIZE >> (PAGE_SHIFT + 3);
-    pcxl_res_hint = 0;
-    pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL,
+        spin_lock_init(&pcxl_res_lock);
+        pcxl_res_size = PCXL_DMA_MAP_SIZE >> (PAGE_SHIFT + 3);
+        pcxl_res_hint = 0;
+        pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL,
                                             get_order(pcxl_res_size));
-    memset(pcxl_res_map, 0, pcxl_res_size);
-    proc_gsc_root = proc_mkdir("gsc", 0);
-    create_proc_info_entry("dino", 0, proc_gsc_root, pcxl_proc_info);
-    return 0;
+        memset(pcxl_res_map, 0, pcxl_res_size);
+        proc_gsc_root = proc_mkdir("gsc", 0);
+        if (!proc_gsc_root)
+                printk(KERN_WARNING
+                        "pcxl_dma_init: Unable to create gsc /proc dir entry\n");
+        else {
+                struct proc_dir_entry* ent;
+                ent = create_proc_info_entry("pcxl_dma", 0,
+                                proc_gsc_root, pcxl_proc_info);
+                if (!ent)
+                        printk(KERN_WARNING
+                                "pci-dma.c: Unable to create pcxl_dma /proc entry.\n");
+        }
+        return 0;
 }
 
 __initcall(pcxl_dma_init);
@@ -545,16 +555,16 @@ struct hppa_dma_ops pcx_dma_ops = {
 
 static int pcxl_proc_info(char *buf, char **start, off_t offset, int len)
 {
+#if 0
         u_long i = 0;
         unsigned long *res_ptr = (u_long *)pcxl_res_map;
-        unsigned long total_pages = pcxl_res_size << 3;        /* 8 bits per byte */
+#endif
+        unsigned long total_pages = pcxl_res_size << 3;   /* 8 bits per byte */
 
-        sprintf(buf, "\nDMA Mapping Area size    : %d bytes (%d pages)\n",
-                PCXL_DMA_MAP_SIZE,
-                (pcxl_res_size << 3) ); /* 1 bit per page */
+        sprintf(buf, "\nDMA Mapping Area size    : %d bytes (%ld pages)\n",
+                PCXL_DMA_MAP_SIZE, total_pages);
         
-        sprintf(buf, "%sResource bitmap : %d bytes (%d pages)\n", 
-                buf, pcxl_res_size, pcxl_res_size << 3);   /* 8 bits per byte */
+        sprintf(buf, "%sResource bitmap : %d bytes\n", buf, pcxl_res_size);
 
         strcat(buf,  "            total:    free:    used:   % used:\n");
         sprintf(buf, "%sblocks  %8d %8ld %8ld %8ld%%\n", buf, pcxl_res_size,
@@ -564,7 +574,8 @@ static int pcxl_proc_info(char *buf, char **start, off_t offset, int len)
         sprintf(buf, "%spages   %8ld %8ld %8ld %8ld%%\n", buf, total_pages,
                 total_pages - pcxl_used_pages, pcxl_used_pages,
                 (pcxl_used_pages * 100 / total_pages));
-        
+
+#if 0
         strcat(buf, "\nResource bitmap:");
 
         for(; i < (pcxl_res_size / sizeof(u_long)); ++i, ++res_ptr) {
@@ -572,6 +583,7 @@ static int pcxl_proc_info(char *buf, char **start, off_t offset, int len)
                     strcat(buf,"\n   ");
                 sprintf(buf, "%s %08lx", buf, *res_ptr);
         }
+#endif
         strcat(buf, "\n");
         return strlen(buf);
 }