block: use struct parsed_partitions *state universally in partition check code

Make the following changes to partition check code.

* Add ->bdev to struct parsed_partitions.

* Introduce read_part_sector() which is a simple wrapper around
  read_dev_sector() which takes struct parsed_partitions *state
  instead of @bdev.

* For functions which used to take @state and @bdev, drop @bdev.  For
  functions which used to take @bdev, replace it with @state.

* While updating, drop superflous checks on NULL state/bdev in ldm.c.

This cleans up the API a bit and enables better handling of IO errors
during partition check as the generic partition check code now has
much better visibility into what went wrong in the low level code
paths.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/fs/partitions/acorn.h b/fs/partitions/acorn.h
index 81fd50ecc080..ede828529692 100644
--- a/fs/partitions/acorn.h
+++ b/fs/partitions/acorn.h
@@ -7,8 +7,8 @@
  *  format, and everyone stick to it?
  */
 
-int adfspart_check_CUMANA(struct parsed_partitions *state, struct block_device *bdev);
-int adfspart_check_ADFS(struct parsed_partitions *state, struct block_device *bdev);
-int adfspart_check_ICS(struct parsed_partitions *state, struct block_device *bdev);
-int adfspart_check_POWERTEC(struct parsed_partitions *state, struct block_device *bdev);
-int adfspart_check_EESOX(struct parsed_partitions *state, struct block_device *bdev);
+int adfspart_check_CUMANA(struct parsed_partitions *state);
+int adfspart_check_ADFS(struct parsed_partitions *state);
+int adfspart_check_ICS(struct parsed_partitions *state);
+int adfspart_check_POWERTEC(struct parsed_partitions *state);
+int adfspart_check_EESOX(struct parsed_partitions *state);