kernel: fix block2mtd build after removing the device refresh ioctl

fixes #13882

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 37332

diff --git a/target/linux/generic/patches-3.10/441-block2mtd_probe.patch b/target/linux/generic/patches-3.10/441-block2mtd_probe.patch
new file mode 100644 (file)
index 0000000..0b2e80c
--- /dev/null
+++ b/target/linux/generic/patches-3.10/441-block2mtd_probe.patch
@@ -0,0 +1,10 @@
+--- a/drivers/mtd/devices/block2mtd.c
++++ b/drivers/mtd/devices/block2mtd.c
+@@ -234,6 +234,7 @@ static struct block2mtd_dev *add_device(
+               /* We might not have rootfs mounted at this point. Try
+                  to resolve the device name by other means. */
+ 
++              wait_for_device_probe();
+               dev_t devt = name_to_dev_t(devname);
+               if (devt)
+                       bdev = blkdev_get_by_dev(devt, mode, dev);

diff --git a/target/linux/generic/patches-3.10/441-block2mtd_refresh.patch b/target/linux/generic/patches-3.10/441-block2mtd_refresh.patch
deleted file mode 100644 (file)
index 11b743d..0000000
--- a/target/linux/generic/patches-3.10/441-block2mtd_refresh.patch
+++ /dev/null
@@ -1,268 +0,0 @@
---- a/drivers/mtd/devices/block2mtd.c
-+++ b/drivers/mtd/devices/block2mtd.c
-@@ -29,6 +29,8 @@ struct block2mtd_dev {
-       struct block_device *blkdev;
-       struct mtd_info mtd;
-       struct mutex write_mutex;
-+      rwlock_t bdev_mutex;
-+      char devname[0];
- };
- 
- 
-@@ -80,6 +82,12 @@ static int block2mtd_erase(struct mtd_in
-       size_t len = instr->len;
-       int err;
- 
-+      read_lock(&dev->bdev_mutex);
-+      if (!dev->blkdev) {
-+              err = -EINVAL;
-+              goto done;
-+      }
-+
-       instr->state = MTD_ERASING;
-       mutex_lock(&dev->write_mutex);
-       err = _block2mtd_erase(dev, from, len);
-@@ -91,6 +99,10 @@ static int block2mtd_erase(struct mtd_in
-               instr->state = MTD_ERASE_DONE;
- 
-       mtd_erase_callback(instr);
-+
-+done:
-+      read_unlock(&dev->bdev_mutex);
-+
-       return err;
- }
- 
-@@ -102,7 +114,13 @@ static int block2mtd_read(struct mtd_inf
-       struct page *page;
-       int index = from >> PAGE_SHIFT;
-       int offset = from & (PAGE_SIZE-1);
--      int cpylen;
-+      int cpylen, err = 0;
-+
-+      read_lock(&dev->bdev_mutex);
-+      if (!dev->blkdev || (from > mtd->size)) {
-+              err = -EINVAL;
-+              goto done;
-+      }
- 
-       while (len) {
-               if ((offset + len) > PAGE_SIZE)
-@@ -112,8 +130,10 @@ static int block2mtd_read(struct mtd_inf
-               len = len - cpylen;
- 
-               page = page_read(dev->blkdev->bd_inode->i_mapping, index);
--              if (IS_ERR(page))
-+              if (IS_ERR(page)) {
-                       return PTR_ERR(page);
-+                      goto done;
-+              }
- 
-               memcpy(buf, page_address(page) + offset, cpylen);
-               page_cache_release(page);
-@@ -124,7 +144,10 @@ static int block2mtd_read(struct mtd_inf
-               offset = 0;
-               index++;
-       }
--      return 0;
-+
-+done:
-+      read_unlock(&dev->bdev_mutex);
-+      return err;
- }
- 
- 
-@@ -173,13 +196,22 @@ static int block2mtd_write(struct mtd_in
-               size_t *retlen, const u_char *buf)
- {
-       struct block2mtd_dev *dev = mtd->priv;
--      int err;
-+      int err = 0;
-+
-+      read_lock(&dev->bdev_mutex);
-+      if (!dev->blkdev) {
-+              err = -EINVAL;
-+              goto done;
-+      }
- 
-       mutex_lock(&dev->write_mutex);
-       err = _block2mtd_write(dev, buf, to, len, retlen);
-       mutex_unlock(&dev->write_mutex);
-       if (err > 0)
-               err = 0;
-+
-+done:
-+      read_unlock(&dev->bdev_mutex);
-       return err;
- }
- 
-@@ -188,33 +220,110 @@ static int block2mtd_write(struct mtd_in
- static void block2mtd_sync(struct mtd_info *mtd)
- {
-       struct block2mtd_dev *dev = mtd->priv;
-+      read_lock(&dev->bdev_mutex);
-+      if (dev->blkdev)
-       sync_blockdev(dev->blkdev);
-+      read_unlock(&dev->bdev_mutex);
-+
-       return;
- }
- 
- 
-+static int _open_bdev(struct block2mtd_dev *dev)
-+{
-+      const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
-+      struct block_device *bdev;
-+
-+      /* Get a handle on the device */
-+      bdev = blkdev_get_by_path(dev->devname, mode, dev);
-+#ifndef MODULE
-+      if (IS_ERR(bdev)) {
-+              dev_t devt;
-+
-+              /* We might not have rootfs mounted at this point. Try
-+                 to resolve the device name by other means. */
-+
-+              devt = name_to_dev_t(dev->devname);
-+              if (devt)
-+                      bdev = blkdev_get_by_dev(devt, mode, dev);
-+      }
-+#endif
-+
-+      if (IS_ERR(bdev)) {
-+              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");
-+              return 1;
-+      }
-+
-+      return 0;
-+}
-+
-+static void _close_bdev(struct block2mtd_dev *dev)
-+{
-+      struct block_device *bdev;
-+
-+      if (!dev->blkdev)
-+              return;
-+
-+      bdev = dev->blkdev;
-+      invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping, 0, -1);
-+      blkdev_put(dev->blkdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
-+      dev->blkdev = NULL;
-+}
-+
- 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);
--              blkdev_put(dev->blkdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
--      }
--
-+      _close_bdev(dev);
-       kfree(dev);
- }
- 
- 
--/* FIXME: ensure that mtd->size % erase_size == 0 */
--static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
-+static int block2mtd_refresh(struct mtd_info *mtd)
- {
--      const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
-+      struct block2mtd_dev *dev = mtd->priv;
-       struct block_device *bdev;
-+      dev_t devt;
-+      int err = 0;
-+
-+      /* no other mtd function can run at this point */
-+      write_lock(&dev->bdev_mutex);
-+
-+      /* get the device number for the whole disk */
-+      devt = MKDEV(MAJOR(dev->blkdev->bd_dev), 0);
-+
-+      /* close the old block device */
-+      _close_bdev(dev);
-+
-+      /* open the whole disk, issue a partition rescan, then */
-+      bdev = blkdev_get_by_dev(devt, FMODE_WRITE | FMODE_READ, mtd);
-+      if (!bdev || !bdev->bd_disk)
-+              err = -EINVAL;
-+#ifndef CONFIG_MTD_BLOCK2MTD_MODULE
-+      else
-+              err = rescan_partitions(bdev->bd_disk, bdev);
-+#endif
-+      if (bdev)
-+              blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
-+
-+      /* try to open the partition block device again */
-+      _open_bdev(dev);
-+      write_unlock(&dev->bdev_mutex);
-+
-+      return err;
-+}
-+
-+/* FIXME: ensure that mtd->size % erase_size == 0 */
-+static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
-+{
-       struct block2mtd_dev *dev;
-       struct mtd_partition *part;
-       char *name;
-@@ -222,36 +331,17 @@ static struct block2mtd_dev *add_device(
-       if (!devname)
-               return NULL;
- 
--      dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL);
-+      dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL);
-       if (!dev)
-               return NULL;
- 
--      /* Get a handle on the device */
--      bdev = blkdev_get_by_path(devname, mode, dev);
--#ifndef MODULE
--      if (IS_ERR(bdev)) {
-+      strcpy(dev->devname, devname);
- 
--              /* 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);
--              if (devt)
--                      bdev = blkdev_get_by_dev(devt, mode, dev);
--      }
--#endif
--
--      if (IS_ERR(bdev)) {
--              ERROR("error: cannot open device %s", devname);
--              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");
-+      if (_open_bdev(dev))
-               goto devinit_err;
--      }
- 
-       mutex_init(&dev->write_mutex);
-+      rwlock_init(&dev->bdev_mutex);
- 
-       /* Setup the MTD structure */
-       /* make the name contain the block device in */
-@@ -276,6 +366,7 @@ static struct block2mtd_dev *add_device(
-       dev->mtd._read = block2mtd_read;
-       dev->mtd.priv = dev;
-       dev->mtd.owner = THIS_MODULE;
-+      dev->mtd.refresh_device = block2mtd_refresh;
- 
-       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
-       part->name = name;

diff --git a/target/linux/generic/patches-3.10/442-block2mtd_probe.patch b/target/linux/generic/patches-3.10/442-block2mtd_probe.patch
deleted file mode 100644 (file)
index 244c31e..0000000
--- a/target/linux/generic/patches-3.10/442-block2mtd_probe.patch
+++ /dev/null
@@ -1,10 +0,0 @@
---- a/drivers/mtd/devices/block2mtd.c
-+++ b/drivers/mtd/devices/block2mtd.c
-@@ -243,6 +243,7 @@ static int _open_bdev(struct block2mtd_d
-               /* We might not have rootfs mounted at this point. Try
-                  to resolve the device name by other means. */
- 
-+              wait_for_device_probe();
-               devt = name_to_dev_t(dev->devname);
-               if (devt)
-                       bdev = blkdev_get_by_dev(devt, mode, dev);