Port SPI-GPIO driver from 2.6.29-rc4

[openwrt.git] / target / linux / generic-2.6 / patches-2.6.27 / 065-rootfs_split.patch

diff --git a/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch b/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch
index 6fb86b9..c05d791 100644 (file)
--- a/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch
+++ b/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch
@@ -373,51 +373,84 @@
        return err;
  }
  
        return err;
  }
  

-@@ -210,32 +246,109 @@ static int block2mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+@@ -210,52 +246,29 @@ static int block2mtd_write(struct mtd_in

  static void block2mtd_sync(struct mtd_info *mtd)
  {
        struct block2mtd_dev *dev = mtd->priv;
 -      sync_blockdev(dev->blkdev);
  static void block2mtd_sync(struct mtd_info *mtd)
  {
        struct block2mtd_dev *dev = mtd->priv;
 -      sync_blockdev(dev->blkdev);

-+
+-      return;
+-}
+-
+-
+-static void block2mtd_free_device(struct block2mtd_dev *dev)
+-{
+-      if (!dev)
+-              return;
+-
+-      kfree(dev->mtd.name);
+ 
+-      if (dev->blkdev) {
+-              invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping,
+-                                      0, -1);
+-              close_bdev_excl(dev->blkdev);
+-      }

 +      read_lock(&dev->bdev_mutex);
 +      if (dev->blkdev)
 +              sync_blockdev(dev->blkdev);
 +      read_unlock(&dev->bdev_mutex);
 +      read_lock(&dev->bdev_mutex);
 +      if (dev->blkdev)
 +              sync_blockdev(dev->blkdev);
 +      read_unlock(&dev->bdev_mutex);

-+
-       return;
+ 
+-      kfree(dev);
++      return;

  }
  
  
  }
  
  

+-/* FIXME: ensure that mtd->size % erase_size == 0 */
+-static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)

 +static int _open_bdev(struct block2mtd_dev *dev)
 +static int _open_bdev(struct block2mtd_dev *dev)

-+{
-+      struct block_device *bdev;
-+
-+      /* Get a handle on the device */
+ {
+       struct block_device *bdev;
+-      struct block2mtd_dev *dev;
+-      struct mtd_partition *part;
+-      char *name;
+-
+-      if (!devname)
+-              return NULL;
+-
+-      dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL);
+-      if (!dev)
+-              return NULL;
+ 
+       /* Get a handle on the device */
+-      bdev = open_bdev_excl(devname, O_RDWR, NULL);

 +      bdev = open_bdev_excl(dev->devname, O_RDWR, NULL);
 +      bdev = open_bdev_excl(dev->devname, O_RDWR, NULL);

-+#ifndef MODULE
-+      if (IS_ERR(bdev)) {
-+
-+              /* We might not have rootfs mounted at this point. Try
-+                 to resolve the device name by other means. */
-+
+ #ifndef MODULE
+       if (IS_ERR(bdev)) {
+ 
+               /* We might not have rootfs mounted at this point. Try
+                  to resolve the device name by other means. */
+ 
+-              dev_t devt = name_to_dev_t(devname);

 +              dev_t devt = name_to_dev_t(dev->devname);
 +              dev_t devt = name_to_dev_t(dev->devname);

-+              if (devt) {
-+                      bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
-+              }
-+      }
-+#endif
-+
-+      if (IS_ERR(bdev)) {
+               if (devt) {
+                       bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
+               }
+@@ -263,17 +276,97 @@ static struct block2mtd_dev *add_device(
+ #endif
+ 
+       if (IS_ERR(bdev)) {
+-              ERROR("error: cannot open device %s", devname);
+-              goto devinit_err;

 +              ERROR("error: cannot open device %s", dev->devname);
 +              return 1;
 +              ERROR("error: cannot open device %s", dev->devname);
 +              return 1;

-+      }
-+      dev->blkdev = bdev;
-+
-+      if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
-+              ERROR("attempting to use an MTD device as a block device");
+       }
+       dev->blkdev = bdev;
+ 
+       if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
+               ERROR("attempting to use an MTD device as a block device");
+-              goto devinit_err;

 +              return 1;
 +              return 1;

-+      }
-+
+       }
+ 

 +      return 0;
 +}
 +
 +      return 0;
 +}
 +


@@ -434,12 +467,12 @@
 +      dev->blkdev = NULL;
 +}
 +
 +      dev->blkdev = NULL;
 +}
 +

- static void block2mtd_free_device(struct block2mtd_dev *dev)
- {
-       if (!dev)
-               return;
- 
-       kfree(dev->mtd.name);
++static void block2mtd_free_device(struct block2mtd_dev *dev)
++{
++      if (!dev)
++              return;
++
++      kfree(dev->mtd.name);

 +      _close_bdev(dev);
 +      kfree(dev);
 +}
 +      _close_bdev(dev);
 +      kfree(dev);
 +}


@@ -457,11 +490,7 @@
 +
 +      /* get the device number for the whole disk */
 +      devt = MKDEV(MAJOR(dev->blkdev->bd_dev), 0);
 +
 +      /* get the device number for the whole disk */
 +      devt = MKDEV(MAJOR(dev->blkdev->bd_dev), 0);

- 
--      if (dev->blkdev) {
--              invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping,
--                                      0, -1);
--              close_bdev_excl(dev->blkdev);
++

 +      /* close the old block device */
 +      _close_bdev(dev);
 +
 +      /* close the old block device */
 +      _close_bdev(dev);
 +


@@ -471,70 +500,42 @@
 +              err = -EINVAL;
 +      else {
 +              err = rescan_partitions(bdev->bd_disk, bdev);
 +              err = -EINVAL;
 +      else {
 +              err = rescan_partitions(bdev->bd_disk, bdev);

-       }
++      }

 +      if (bdev)
 +              close_bdev_excl(bdev);
 +      if (bdev)
 +              close_bdev_excl(bdev);

- 
--      kfree(dev);
--}
++

 +      /* try to open the partition block device again */
 +      _open_bdev(dev);
 +      write_unlock(&dev->bdev_mutex);
 +      /* try to open the partition block device again */
 +      _open_bdev(dev);
 +      write_unlock(&dev->bdev_mutex);

- 
++

 +      return err;
 +}
 +      return err;
 +}

- 
- /* FIXME: ensure that mtd->size % erase_size == 0 */
--static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
++
++/* FIXME: ensure that mtd->size % erase_size == 0 */

 +static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
 +static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)

- {
--      struct block_device *bdev;
-       struct block2mtd_dev *dev;
-       struct mtd_partition *part;
-       char *name;
-@@ -243,37 +356,17 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size, const cha
-       if (!devname)
-               return NULL;
- 
--      dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL);
++{
++      struct block2mtd_dev *dev;
++      struct mtd_partition *part;
++      char *name;
++
++      if (!devname)
++              return NULL;
++

 +      dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL);
 +      dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL);

-       if (!dev)
-               return NULL;
- 
--      /* Get a handle on the device */
--      bdev = open_bdev_excl(devname, O_RDWR, NULL);
--#ifndef MODULE
--      if (IS_ERR(bdev)) {
--
--              /* We might not have rootfs mounted at this point. Try
--                 to resolve the device name by other means. */
++      if (!dev)
++              return NULL;
++

 +      strcpy(dev->devname, devname);
 +      strcpy(dev->devname, devname);

- 
--              dev_t devt = name_to_dev_t(devname);
--              if (devt) {
--                      bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
--              }
--      }
--#endif
--
--      if (IS_ERR(bdev)) {
--              ERROR("error: cannot open device %s", devname);
++

 +      if (_open_bdev(dev))
 +      if (_open_bdev(dev))

-               goto devinit_err;
--      }
--      dev->blkdev = bdev;
--
--      if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
--              ERROR("attempting to use an MTD device as a block device");
--              goto devinit_err;
--      }
- 
++              goto devinit_err;
++

        mutex_init(&dev->write_mutex);
 +      rwlock_init(&dev->bdev_mutex);
  
        if (!mtdname)
                mtdname = devname;
        mutex_init(&dev->write_mutex);
 +      rwlock_init(&dev->bdev_mutex);
  
        if (!mtdname)
                mtdname = devname;

-@@ -297,6 +408,7 @@ static struct block2mtd_dev *add_device(
+@@ -297,6 +390,7 @@ static struct block2mtd_dev *add_device(

        dev->mtd.read = block2mtd_read;
        dev->mtd.priv = dev;
        dev->mtd.owner = THIS_MODULE;
        dev->mtd.read = block2mtd_read;
        dev->mtd.priv = dev;
        dev->mtd.owner = THIS_MODULE;