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crypto: sun4i-ss - use GENMASK to generate masks

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Use the GENMASK helper instead of custom calculations to generate masks,
It also helps the readability.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Antoine Ténart
2017-06-01 21:39:00 +02:00
committed by Herbert Xu
parent 303391d69b
commit d78867a94e
1 changed files with 7 additions and 4 deletions
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11
drivers/crypto/sunxi-ss/sun4i-ss-hash.c
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@@ -384,11 +384,14 @@ static int sun4i_hash(struct ahash_request *areq)
writesl(ss->base + SS_RXFIFO, op->buf, nwait);
op->byte_count += 4 * nwait;
}
nbw = op->len - 4 * nwait;
wb = *(u32 *)(op->buf + nwait * 4);
wb &= (0xFFFFFFFF >> (4 - nbw) * 8);
op->byte_count += nbw;
nbw = op->len - 4 * nwait;
if (nbw) {
wb = *(u32 *)(op->buf + nwait * 4);
wb &= GENMASK((nbw * 8) - 1, 0);
op->byte_count += nbw;
}
}
/* write the remaining bytes of the nbw buffer */