V4L/DVB: s2255drv: return if vdev not found

[safe/jmp/linux-2.6] / drivers / mtd / devices / mtdram.c

diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
index 1443117..fce5ff7 100644 (file)
--- a/drivers/mtd/devices/mtdram.c
+++ b/drivers/mtd/devices/mtdram.c
@@ -1,6 +1,5 @@
 /*
  * mtdram - a test mtd device
- * $Id: mtdram.c,v 1.37 2005/04/21 03:42:11 joern Exp $
  * Author: Alexander Larsson <alex@cendio.se>
  *
  * Copyright (c) 1999 Alexander Larsson <alex@cendio.se>
@@ -10,7 +9,6 @@
  *
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/ioport.h>
@@ -18,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/mtd/compatmac.h>
 #include <linux/mtd/mtd.h>
+#include <linux/mtd/mtdram.h>
 
 static unsigned long total_size = CONFIG_MTDRAM_TOTAL_SIZE;
 static unsigned long erase_size = CONFIG_MTDRAM_ERASE_SIZE;
@@ -48,19 +47,35 @@ static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)
 }
 
 static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
-               size_t *retlen, u_char **mtdbuf)
+               size_t *retlen, void **virt, resource_size_t *phys)
 {
        if (from + len > mtd->size)
                return -EINVAL;
 
-       *mtdbuf = mtd->priv + from;
+       /* can we return a physical address with this driver? */
+       if (phys)
+               return -EINVAL;
+
+       *virt = mtd->priv + from;
        *retlen = len;
        return 0;
 }
 
-static void ram_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from,
-               size_t len)
+static void ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+{
+}
+
+/*
+ * Allow NOMMU mmap() to directly map the device (if not NULL)
+ * - return the address to which the offset maps
+ * - return -ENOSYS to indicate refusal to do the mapping
+ */
+static unsigned long ram_get_unmapped_area(struct mtd_info *mtd,
+                                          unsigned long len,
+                                          unsigned long offset,
+                                          unsigned long flags)
 {
+       return (unsigned long) mtd->priv + offset;
 }
 
 static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
@@ -106,6 +121,7 @@ int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
        mtd->type = MTD_RAM;
        mtd->flags = MTD_CAP_RAM;
        mtd->size = size;
+       mtd->writesize = 1;
        mtd->erasesize = MTDRAM_ERASE_SIZE;
        mtd->priv = mapped_address;
 
@@ -113,6 +129,7 @@ int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
        mtd->erase = ram_erase;
        mtd->point = ram_point;
        mtd->unpoint = ram_unpoint;
+       mtd->get_unmapped_area = ram_get_unmapped_area;
        mtd->read = ram_read;
        mtd->write = ram_write;