Bjorn Andersson a83406f21b sparse: Handle larger FILL and DONT_CARE chunks ...

The unsparsed chunk size is expressed in units of blk_sz. For RAW chunks
this is then limited to (just under) 32-bits due to the total_sz
(sparsed chunk size), but FILL and DONT_CARE can be much bigger.

But doing the size calculation on the 32-bit integers overflows and any
upper bits are lost, and the unsparsed result is wrong. So, switch this
to 64-bit instead.

It's unclear what happens if we pass a larger num_sectors to the
programmer, so this limitation is left, and checked for.

Fixes: 02c008adfd ("add support sparse attribute")
Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>

2025-08-28 10:42:08 -05:00

2.1 KiB

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