Commit 3faf757b authored Sep 07, 2020 by Tero Kristo Committed by Herbert Xu Sep 18, 2020

crypto: omap-sham - fix digcnt register handling with export/import

Running export/import for hashes in peculiar order (mostly done by
openssl) can mess up the internal book keeping of the OMAP SHA core.
Fix by forcibly writing the correct DIGCNT back to hardware. This issue
was noticed while transitioning to openssl 1.1 support.

Fixes: 0d373d60 ("crypto: omap-sham - Add OMAP4/AM33XX SHAM Support")
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 133c3d43

drivers/crypto/omap-sham.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -460,6 +460,9 @@ static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
		struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
		u32 val, mask;

		if (likely(ctx->digcnt))
		omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);

		/*
		* Setting ALGO_CONST only for the first iteration and
		* CLOSE_HASH only for the last one. Note that flags mode bits

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