From: Andre Przywara Subject: [RFC PATCH 2/5] crypto: sunxi-ss: fix min3() call to match types Date: Tue, 22 Dec 2015 12:27:44 +0000 Message-ID: <1450787267-26836-3-git-send-email-andre.przywara@arm.com> References: <1450787267-26836-1-git-send-email-andre.przywara@arm.com> Cc: marc.zyngier@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, linux-sunxi@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Corentin Labbe , Herbert Xu , "David S. Miller" , linux-crypto@vger.kernel.org To: Maxime Ripard , Chen-Yu Tsai , arnd@arndb.de Return-path: In-Reply-To: <1450787267-26836-1-git-send-email-andre.przywara@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org The min3() macro expects all arguments to be of the same type (or size at least). While two arguments are ints or u32s, one is size_t, which does not match on 64-bit architectures. Cast the size_t to u32 to make min3() happy. In this context here the length should never exceed 32 bits anyway. Signed-off-by: Andre Przywara --- drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 12 ++++++------ drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 8 ++++---- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c index a19ee12..b3bc7bd 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c @@ -79,7 +79,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq) oi = 0; oo = 0; do { - todo = min3(rx_cnt, ileft, (mi.length - oi) / 4); + todo = min3(rx_cnt, ileft, (u32)(mi.length - oi) / 4); if (todo > 0) { ileft -= todo; writesl(ss->base + SS_RXFIFO, mi.addr + oi, todo); @@ -94,7 +94,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq) rx_cnt = SS_RXFIFO_SPACES(spaces); tx_cnt = SS_TXFIFO_SPACES(spaces); - todo = min3(tx_cnt, oleft, (mo.length - oo) / 4); + todo = min3(tx_cnt, oleft, (u32)(mo.length - oo) / 4); if (todo > 0) { oleft -= todo; readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo); @@ -216,7 +216,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq) * 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); + todo = min3(rx_cnt, ileft / 4, (u32)(mi.length - oi) / 4); if (todo > 0 && ob == 0) { writesl(ss->base + SS_RXFIFO, mi.addr + oi, todo); @@ -231,7 +231,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq) * pass, so it is why we min() with rx_cnt */ todo = min3(rx_cnt * 4 - ob, ileft, - mi.length - oi); + (u32)mi.length - oi); memcpy(buf + ob, mi.addr + oi, todo); ileft -= todo; oi += todo; @@ -260,7 +260,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq) if (tx_cnt == 0) continue; /* todo in 4bytes word */ - todo = min3(tx_cnt, oleft / 4, (mo.length - oo) / 4); + todo = min3(tx_cnt, oleft / 4, (u32)(mo.length - oo) / 4); if (todo > 0) { readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo); oleft -= todo * 4; @@ -284,7 +284,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq) * no more than remaining buffer * no need to test against oleft */ - todo = min(mo.length - oo, obl - obo); + todo = min((u32)mo.length - oo, obl - obo); memcpy(mo.addr + oo, bufo + obo, todo); oleft -= todo; obo += todo; diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c index ff80314..cd29009 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c @@ -245,7 +245,7 @@ int sun4i_hash_update(struct ahash_request *areq) */ while (op->len < 64 && i < end) { /* how many bytes we can read from current SG */ - in_r = min3(mi.length - in_i, end - i, + in_r = min3((u32)mi.length - in_i, end - i, 64 - op->len); memcpy(op->buf + op->len, mi.addr + in_i, in_r); op->len += in_r; @@ -266,8 +266,8 @@ int sun4i_hash_update(struct ahash_request *areq) } if (mi.length - in_i > 3 && i < end) { /* how many bytes we can read from current SG */ - in_r = min3(mi.length - in_i, areq->nbytes - i, - ((mi.length - in_i) / 4) * 4); + in_r = min3((u32)mi.length - in_i, areq->nbytes - i, + ((u32)(mi.length - in_i) / 4) * 4); /* how many bytes we can write in the device*/ todo = min3((u32)(end - i) / 4, rx_cnt, (u32)in_r / 4); writesl(ss->base + SS_RXFIFO, mi.addr + in_i, todo); @@ -289,7 +289,7 @@ int sun4i_hash_update(struct ahash_request *areq) if ((areq->nbytes - i) < 64) { while (i < areq->nbytes && in_i < mi.length && op->len < 64) { /* how many bytes we can read from current SG */ - in_r = min3(mi.length - in_i, areq->nbytes - i, + in_r = min3((u32)mi.length - in_i, areq->nbytes - i, 64 - op->len); memcpy(op->buf + op->len, mi.addr + in_i, in_r); op->len += in_r; -- 2.5.1