Revert "crypto: allwinner - Fix dma_map_sg error check"
This reverts commit 2b02187bdb0bb75000850bd0309e70eb8664159e.
The original code was correct and arguably more robust than the
patched version.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
index be7f46f..74b4e91 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
@@ -208,7 +208,7 @@
if (areq->src == areq->dst) {
nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_BIDIRECTIONAL);
- if (!nr_sgs || nr_sgs > MAX_SG) {
+ if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
err = -EINVAL;
goto theend_iv;
@@ -216,13 +216,13 @@
nr_sgd = nr_sgs;
} else {
nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
- if (!nr_sgs || nr_sgs > MAX_SG) {
+ if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
err = -EINVAL;
goto theend_iv;
}
nr_sgd = dma_map_sg(ce->dev, areq->dst, nd, DMA_FROM_DEVICE);
- if (!nr_sgd || nr_sgd > MAX_SG) {
+ if (nr_sgd <= 0 || nr_sgd > MAX_SG) {
dev_err(ce->dev, "Invalid sg number %d\n", nr_sgd);
err = -EINVAL;
goto theend_sgs;
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c
index 0e6843e..8b5b9b9 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c
@@ -389,7 +389,7 @@
cet->t_asym_ctl = 0;
nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
- if (!nr_sgs || nr_sgs > MAX_SG) {
+ if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
err = -EINVAL;
goto theend;
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index fdcc98c..910d675 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -232,13 +232,13 @@
nr_sgd = nr_sgs;
} else {
nr_sgs = dma_map_sg(ss->dev, areq->src, nsgs, DMA_TO_DEVICE);
- if (!nr_sgs || nr_sgs > 8) {
+ if (nr_sgs <= 0 || nr_sgs > 8) {
dev_err(ss->dev, "Invalid sg number %d\n", nr_sgs);
err = -EINVAL;
goto theend_iv;
}
nr_sgd = dma_map_sg(ss->dev, areq->dst, nsgd, DMA_FROM_DEVICE);
- if (!nr_sgd || nr_sgd > 8) {
+ if (nr_sgd <= 0 || nr_sgd > 8) {
dev_err(ss->dev, "Invalid sg number %d\n", nr_sgd);
err = -EINVAL;
goto theend_sgs;
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
index fcb8c41..36a82b2 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -527,7 +527,7 @@
rctx->method = ss->variant->alg_hash[algt->ss_algo_id];
nr_sgs = dma_map_sg(ss->dev, areq->src, sg_nents(areq->src), DMA_TO_DEVICE);
- if (!nr_sgs || nr_sgs > MAX_SG) {
+ if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
dev_err(ss->dev, "Invalid sg number %d\n", nr_sgs);
err = -EINVAL;
goto theend;
