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| author | Peter Oberparleiter <oberpar@linux.ibm.com> | 2019-03-22 16:01:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 19:40:14 +0200 |
| commit | 9d02fc4b7789af1875e4c0382897ac121389c580 (patch) | |
| tree | 41b92e9f975ed80d53bad1851189ce20e5a031c7 /net | |
| parent | 181518b8eb4eb44aae043d584336d715b572902e (diff) | |
s390/dasd: Fix capacity calculation for large volumes
[ Upstream commit 2cc9637ce825f3a9f51f8f78af7474e9e85bfa5f ]
The DASD driver incorrectly limits the maximum number of blocks of ECKD
DASD volumes to 32 bit numbers. Volumes with a capacity greater than
2^32-1 blocks are incorrectly recognized as smaller volumes.
This results in the following volume capacity limits depending on the
formatted block size:
BLKSIZE MAX_GB MAX_CYL
512 2047 5843492
1024 4095 8676701
2048 8191 13634816
4096 16383 23860929
The same problem occurs when a volume with more than 17895697 cylinders
is accessed in raw-track-access mode.
Fix this problem by adding an explicit type cast when calculating the
maximum number of blocks.
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions