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UBI: fix mean EC calculation
authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Sat, 19 Apr 2008 17:44:31 +0000 (20:44 +0300)
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Sat, 19 Apr 2008 17:49:41 +0000 (20:49 +0300)
commit4bc1dca4b0eb4dfbf100895bfc1256f21e3c901a
tree4ccfc207a0b55cfad4247f49bd1bce03d5034560tree | snapshot (tar.gz zip)
parentcbd8a9d2cd6f576ca41022599341bbd8be1b0b27commit | diff
UBI: fix mean EC calculation

(a + b) / (c + d) != a / c + b / d. The old code errornously
assumed this incorrect formuld. Instead, just sum all erase
counters in a 64-bit variable and divide to the number of EBs
at the end.

Thanks to Adrian Hunter for pointing this out.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
drivers/mtd/ubi/scan.c diff | blob | blame | history
drivers/mtd/ubi/scan.h diff | blob | blame | history