With a10a204aab ("kernel: make ubi auto-attach check for a tar file
magic") the check for the magic was added without considering a failing
mtd_read(). If the read fails, no check is done and the mount code is
called straight away.
Failing with an error message for such cases seems to me the cleaner way,
as it would allow to spot hidden/workaround issues.
Signed-off-by: Mathias Kresin <dev@kresin.me>
The first block(s) of the ubi mtd device might be bad. We need to take
care on our own to skip the bad block(s) and read the next one(s).
Don't treat recoverable read errors as fatal and check for the UBI magic
if the data of a block could be recovered using ECC or similar.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Move the put_mtd_device() called on multiple error conditions to a goto
label to use it later for more error conditions.
The early return on failed open of the mtd device and mismatching mtd
type allows to get rid of one level of indentation. By jumping to the
cleanup code, a refcount bug is fixed for the wrong flash type condition.
While at it, make clear that we only check for the UBI magic if the read
from flash was successful.
Signed-off-by: Mathias Kresin <dev@kresin.me>
A few UBI messages lacks the trailing newline character which
leads to ugly lines in the bootlog like this:
[ 6.649159] UBI error: no valid UBI magic found inside mtd6[ 6.667751] Freeing unused kernel memory: 2196K
Add a newline character to the end of the messages to fix it.
After the fix the line from above looks better in the log:
[ 6.609182] UBI error: no valid UBI magic found inside mtd6
[ 6.627599] Freeing unused kernel memory: 2132K
Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
