[PATCH] Fix squashfs failing to load sparse files

[Tom Rini]

On Mon, Nov 23, 2020 at 03:40:03PM +1300, Campbell Suter wrote:

> SquashFS supports sprase blocks in files - that is, if a given block is
> composed only of zeros, it's not written to the output file to save
> space and it's on-disk length field is set to zero to indicate that.
> 
> Previously the squashfs driver did not recognise that, and would attempt
> to read and decompress a zero-sized block, which obviously failed.
> 
> The following command may be used to create a file for testing:
> 
> cat <(dd if=/dev/urandom of=/dev/stdout bs=1M count=1) \
> 	<(dd if=/dev/zero of=/dev/stdout bs=1M count=1) \
> 	<(dd if=/dev/urandom of=/dev/stdout bs=1k count=200) >test_file
> 
> Signed-off-by: Campbell Suter <campbell at snapit.group>

Applied to u-boot/master, thanks!

-- 
Tom
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