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authorSascha Hauer <s.hauer@pengutronix.de>2013-04-04 13:59:21 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2013-05-31 09:34:48 +0200
commite82e40523f8df1c10b6646798065115119aea9a8 (patch)
tree2fa821d7e68a6ff78233277ae5980ab7c7ce7381 /common/block.c
parentb5c4e238d38adf76c4648494ae6eeb62345bd086 (diff)
downloadbarebox-e82e40523f8df1c10b6646798065115119aea9a8.tar.gz
block: implement block_read/block_write functions
Some drivers use blk->ops->read/write. This bypasses the caching block layer and was never intended like this. The upper API to the block layer is the cdev layer. This patch adds block_read and block_write functions and uses them where appropriate. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common/block.c')
-rw-r--r--common/block.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/common/block.c b/common/block.c
index 2cf85ae..ad07f8b 100644
--- a/common/block.c
+++ b/common/block.c
@@ -387,3 +387,25 @@ int blockdevice_unregister(struct block_device *blk)
return 0;
}
+
+int block_read(struct block_device *blk, void *buf, int block, int num_blocks)
+{
+ int ret;
+
+ ret = cdev_read(&blk->cdev, buf,
+ num_blocks << blk->blockbits,
+ (loff_t)block << blk->blockbits, 0);
+
+ return ret < 0 ? ret : 0;
+}
+
+int block_write(struct block_device *blk, void *buf, int block, int num_blocks)
+{
+ int ret;
+
+ ret = cdev_write(&blk->cdev, buf,
+ num_blocks << blk->blockbits,
+ (loff_t)block << blk->blockbits, 0);
+
+ return ret < 0 ? ret : 0;
+}