libflash/blocklevel: Smarten up blocklevel_smart_write()

Blocklevel_smart_write() can write in a smart fashion which avoids the need
for the caller to erase the flash before writing, except it never actually
does the erase if it needs to.

Furthermore, a very simple optimisation can be made where it should detect
if it doesn't actually need to clear the flash, but still needs to write.
This optimisation is from flash_smart_write(), which, for reasons, should
continue to exist at least for now.

In the process, this also addresses a bug. blocklevel_smart_write()
operates on erase block covered by the write, detects to see if an erase
needs to be performed and if so, performs the erase and then performs the
write.

Currently blocklevel_smart_write() won't detect that a write can span two
erase blocks and that it should split this process in two. This patch fixes
that.

Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com>
Reviewed-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

0 files changed, 0 insertions, 0 deletions