Re: [sparc64] crc32c misbehave

From: David Miller <davem@davemloft.net>
Date: Wed, 31 May 2017 11:53:35 -0400 (EDT)

Can you try something like disabling cpu IRQs around the crc32c() function
in lib/libcrc32c.c?  Something like:

	u32 retval;

	local_irq_disable();

	shash->tfm = tfm;
	shash->flags = 0;
	*ctx = crc;

	err = crypto_shash_update(shash, address, length);
	BUG_ON(err);

	retval = *ctx;

	local_irq_enable();

	return retval;

Actually you would need a spinlock, with IRQs disabled, to properly test
this theory since the TFM is shared across the entire system.

The really suspicious part of your test results is that the corrupted
checksum always evaluates to zero.