[PATCH v2 02/12] crypto: sun4i-ss: remove conditional checks against 0

Antoine Tenart
2017-05-29T20:27:28Z

Cosmetic clean up if conditional checks on 0s values.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
---
drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 28 +++++++++++-----------
drivers/crypto/sunxi-ss/sun4i-ss-core.c | 10 ++++----
drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 40 +++++++++++++++----------------
3 files changed, 39 insertions(+), 39 deletions(-)

diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
index 90efd10d57a1..23e549204365 100644
--- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
+++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
@@ -38,7 +38,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
unsigned int oi, oo; /* offset for in and out */
unsigned long flags;

- if (areq->nbytes == 0)
+ if (!areq->nbytes)
return 0;

if (!areq->info) {
@@ -82,7 +82,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
oo = 0;
do {
todo = min3(rx_cnt, ileft, (mi.length - oi) / 4);
- if (todo > 0) {
+ if (todo) {
ileft -= todo;
writesl(ss->base + SS_RXFIFO, mi.addr + oi, todo);
oi += todo * 4;
@@ -97,7 +97,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
tx_cnt = SS_TXFIFO_SPACES(spaces);

todo = min3(tx_cnt, oleft, (mo.length - oo) / 4);
- if (todo > 0) {
+ if (todo) {
oleft -= todo;
readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo);
oo += todo * 4;
@@ -106,7 +106,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
sg_miter_next(&mo);
oo = 0;
}
- } while (oleft > 0);
+ } while (oleft);

if (areq->info) {
for (i = 0; i < 4 && i < ivsize / 4; i++) {
@@ -154,7 +154,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
unsigned int obl = 0; /* length of data in bufo */
unsigned long flags;

- if (areq->nbytes == 0)
+ if (!areq->nbytes)
return 0;

if (!areq->info) {
@@ -172,12 +172,12 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
* we can use the SS optimized function
*/
while (in_sg && no_chunk == 1) {
- if ((in_sg->length % 4) != 0)
+ if (in_sg->length % 4)
no_chunk = 0;
in_sg = sg_next(in_sg);
}
while (out_sg && no_chunk == 1) {
- if ((out_sg->length % 4) != 0)
+ if (out_sg->length % 4)
no_chunk = 0;
out_sg = sg_next(out_sg);
}
@@ -214,14 +214,14 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
oi = 0;
oo = 0;

- while (oleft > 0) {
- if (ileft > 0) {
+ while (oleft) {
+ if (ileft) {
/*
* todo is the number of consecutive 4byte word that we
* can read from current SG
*/
todo = min3(rx_cnt, ileft / 4, (mi.length - oi) / 4);
- if (todo > 0 && ob == 0) {
+ if (todo && !ob) {
writesl(ss->base + SS_RXFIFO, mi.addr + oi,
todo);
ileft -= todo * 4;
@@ -240,7 +240,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
ileft -= todo;
oi += todo;
ob += todo;
- if (ob % 4 == 0) {
+ if (!(ob % 4)) {
writesl(ss->base + SS_RXFIFO, buf,
ob / 4);
ob = 0;
@@ -260,11 +260,11 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
oi, mi.length, ileft, areq->nbytes, rx_cnt,
oo, mo.length, oleft, areq->nbytes, tx_cnt, ob);

- if (tx_cnt == 0)
+ if (!tx_cnt)
continue;
/* todo in 4bytes word */
todo = min3(tx_cnt, oleft / 4, (mo.length - oo) / 4);
- if (todo > 0) {
+ if (todo) {
readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo);
oleft -= todo * 4;
oo += todo * 4;
@@ -516,7 +516,7 @@ int sun4i_ss_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
flags = crypto_ablkcipher_get_flags(tfm);

ret = des_ekey(tmp, key);
- if (unlikely(ret == 0) && (flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ if (unlikely(!ret) && (flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_WEAK_KEY);
dev_dbg(ss->dev, "Weak key %u\n", keylen);
return -EINVAL;
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-core.c b/drivers/crypto/sunxi-ss/sun4i-ss-core.c
index 3ac6c6c4ad18..50af81c3eb45 100644
--- a/drivers/crypto/sunxi-ss/sun4i-ss-core.c
+++ b/drivers/crypto/sunxi-ss/sun4i-ss-core.c
@@ -266,12 +266,12 @@ static int sun4i_ss_probe(struct platform_device *pdev)

/* Enable both clocks */
err = clk_prepare_enable(ss->busclk);
- if (err != 0) {
+ if (err) {
dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");
return err;
}
err = clk_prepare_enable(ss->ssclk);
- if (err != 0) {
+ if (err) {
dev_err(&pdev->dev, "Cannot prepare_enable ssclk\n");
goto error_ssclk;
}
@@ -281,7 +281,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
* Try to set the clock to the maximum allowed
*/
err = clk_set_rate(ss->ssclk, cr_mod);
- if (err != 0) {
+ if (err) {
dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n");
goto error_clk;
}
@@ -342,7 +342,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
switch (ss_algs[i].type) {
case CRYPTO_ALG_TYPE_ABLKCIPHER:
err = crypto_register_alg(&ss_algs[i].alg.crypto);
- if (err != 0) {
+ if (err) {
dev_err(ss->dev, "Fail to register %s\n",
ss_algs[i].alg.crypto.cra_name);
goto error_alg;
@@ -350,7 +350,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
break;
case CRYPTO_ALG_TYPE_AHASH:
err = crypto_register_ahash(&ss_algs[i].alg.hash);
- if (err != 0) {
+ if (err) {
dev_err(ss->dev, "Fail to register %s\n",
ss_algs[i].alg.hash.halg.base.cra_name);
goto error_alg;
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c
index 855325338844..39f0abe5ee25 100644
--- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c
+++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c
@@ -60,7 +60,7 @@ int sun4i_hash_export_md5(struct ahash_request *areq, void *out)

memcpy(octx->block, op->buf, op->len);

- if (op->byte_count > 0) {
+ if (op->byte_count) {
for (i = 0; i < 4; i++)
octx->hash[i] = op->hash[i];
} else {
@@ -102,7 +102,7 @@ int sun4i_hash_export_sha1(struct ahash_request *areq, void *out)

memcpy(octx->buffer, op->buf, op->len);

- if (op->byte_count > 0) {
+ if (op->byte_count) {
for (i = 0; i < 5; i++)
octx->state[i] = op->hash[i];
} else {
@@ -195,7 +195,7 @@ static int sun4i_hash(struct ahash_request *areq)
op->byte_count, areq->nbytes, op->mode,
op->len, op->hash[0]);

- if (unlikely(areq->nbytes == 0) && (op->flags & SS_HASH_FINAL) == 0)
+ if (unlikely(!areq->nbytes) && !(op->flags & SS_HASH_FINAL))
return 0;

/* protect against overflow */
@@ -204,7 +204,7 @@ static int sun4i_hash(struct ahash_request *areq)
return -EINVAL;
}

- if (op->len + areq->nbytes < 64 && (op->flags & SS_HASH_FINAL) == 0) {
+ if (op->len + areq->nbytes < 64 && !(op->flags & SS_HASH_FINAL)) {
/* linearize data to op->buf */
copied = sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
op->buf + op->len, areq->nbytes, 0);
@@ -218,7 +218,7 @@ static int sun4i_hash(struct ahash_request *areq)
* if some data have been processed before,
* we need to restore the partial hash state
*/
- if (op->byte_count > 0) {
+ if (op->byte_count) {
ivmode = SS_IV_ARBITRARY;
for (i = 0; i < 5; i++)
writel(op->hash[i], ss->base + SS_IV0 + i * 4);
@@ -226,11 +226,11 @@ static int sun4i_hash(struct ahash_request *areq)
/* Enable the device */
writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL);

- if ((op->flags & SS_HASH_UPDATE) == 0)
+ if (!(op->flags & SS_HASH_UPDATE))
goto hash_final;

/* start of handling data */
- if ((op->flags & SS_HASH_FINAL) == 0) {
+ if (!(op->flags & SS_HASH_FINAL)) {
end = ((areq->nbytes + op->len) / 64) * 64 - op->len;

if (end > areq->nbytes || areq->nbytes - end > 63) {
@@ -244,14 +244,14 @@ static int sun4i_hash(struct ahash_request *areq)
end = ((areq->nbytes + op->len) / 4) * 4 - op->len;
}

- /* TODO if SGlen % 4 and op->len == 0 then DMA */
+ /* TODO if SGlen % 4 and !op->len then DMA */
i = 1;
while (in_sg && i == 1) {
- if ((in_sg->length % 4) != 0)
+ if (in_sg->length % 4)
i = 0;
in_sg = sg_next(in_sg);
}
- if (i == 1 && op->len == 0)
+ if (i == 1 && !op->len)
dev_dbg(ss->dev, "We can DMA\n");

i = 0;
@@ -266,7 +266,7 @@ static int sun4i_hash(struct ahash_request *areq)
* - the buffer is already used
* - the SG does not have enough byte remaining ( < 4)
*/
- if (op->len > 0 || (mi.length - in_i) < 4) {
+ if (op->len || (mi.length - in_i) < 4) {
/*
* if we have entered here we have two reason to stop
* - the buffer is full
@@ -285,7 +285,7 @@ static int sun4i_hash(struct ahash_request *areq)
in_i = 0;
}
}
- if (op->len > 3 && (op->len % 4) == 0) {
+ if (op->len > 3 && !(op->len % 4)) {
/* write buf to the device */
writesl(ss->base + SS_RXFIFO, op->buf,
op->len / 4);
@@ -304,7 +304,7 @@ static int sun4i_hash(struct ahash_request *areq)
i += todo * 4;
in_i += todo * 4;
rx_cnt -= todo;
- if (rx_cnt == 0) {
+ if (!rx_cnt) {
spaces = readl(ss->base + SS_FCSR);
rx_cnt = SS_RXFIFO_SPACES(spaces);
}
@@ -342,7 +342,7 @@ static int sun4i_hash(struct ahash_request *areq)
* Now if we have the flag final go to finalize part
* If not, store the partial hash
*/
- if ((op->flags & SS_HASH_FINAL) > 0)
+ if (op->flags & SS_HASH_FINAL)
goto hash_final;

writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);
@@ -350,7 +350,7 @@ static int sun4i_hash(struct ahash_request *areq)
do {
v = readl(ss->base + SS_CTL);
i++;
- } while (i < SS_TIMEOUT && (v & SS_DATA_END) > 0);
+ } while (i < SS_TIMEOUT && (v & SS_DATA_END));
if (unlikely(i >= SS_TIMEOUT)) {
dev_err_ratelimited(ss->dev,
"ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
@@ -379,9 +379,9 @@ static int sun4i_hash(struct ahash_request *areq)
hash_final:

/* write the remaining words of the wait buffer */
- if (op->len > 0) {
+ if (op->len) {
nwait = op->len / 4;
- if (nwait > 0) {
+ if (nwait) {
writesl(ss->base + SS_RXFIFO, op->buf, nwait);
op->byte_count += 4 * nwait;
}
@@ -391,7 +391,7 @@ static int sun4i_hash(struct ahash_request *areq)
}

/* write the remaining bytes of the nbw buffer */
- if (nbw > 0) {
+ if (nbw) {
wb |= ((1 << 7) << (nbw * 8));
bf[j++] = wb;
} else {
@@ -444,7 +444,7 @@ static int sun4i_hash(struct ahash_request *areq)
do {
v = readl(ss->base + SS_CTL);
i++;
- } while (i < SS_TIMEOUT && (v & SS_DATA_END) > 0);
+ } while (i < SS_TIMEOUT && (v & SS_DATA_END));
if (unlikely(i >= SS_TIMEOUT)) {
dev_err_ratelimited(ss->dev,
"ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
@@ -504,7 +504,7 @@ int sun4i_hash_digest(struct ahash_request *areq)
struct sun4i_req_ctx *op = ahash_request_ctx(areq);

err = sun4i_hash_init(areq);
- if (err != 0)
+ if (err)
return err;

op->flags = SS_HASH_UPDATE | SS_HASH_FINAL;
--
2.9.4