From 5bc357037476bf8d4623ab4ef0d1640b947c4625 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 20 Aug 2013 11:54:48 +0300 Subject: [PATCH] crypto: tegra-aes - bitwise vs logical and The bug here is that: while (eng_busy & (!icq_empty) & dma_busy) is never true because it's using bitwise instead of logical ANDs. The other bitwise AND conditions work as intended but I changed them as well for consistency. Signed-off-by: Dan Carpenter Signed-off-by: Herbert Xu --- drivers/crypto/tegra-aes.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/tegra-aes.c b/drivers/crypto/tegra-aes.c index 85ea7525fa36..2d58da972ae2 100644 --- a/drivers/crypto/tegra-aes.c +++ b/drivers/crypto/tegra-aes.c @@ -275,7 +275,7 @@ static int aes_start_crypt(struct tegra_aes_dev *dd, u32 in_addr, u32 out_addr, value = aes_readl(dd, TEGRA_AES_INTR_STATUS); eng_busy = value & TEGRA_AES_ENGINE_BUSY_FIELD; icq_empty = value & TEGRA_AES_ICQ_EMPTY_FIELD; - } while (eng_busy & (!icq_empty)); + } while (eng_busy && !icq_empty); aes_writel(dd, cmdq[i], TEGRA_AES_ICMDQUE_WR); } @@ -365,7 +365,7 @@ static int aes_set_key(struct tegra_aes_dev *dd) eng_busy = value & TEGRA_AES_ENGINE_BUSY_FIELD; icq_empty = value & TEGRA_AES_ICQ_EMPTY_FIELD; dma_busy = value & TEGRA_AES_DMA_BUSY_FIELD; - } while (eng_busy & (!icq_empty) & dma_busy); + } while (eng_busy && !icq_empty && dma_busy); /* settable command to get key into internal registers */ value = CMD_SETTABLE << CMDQ_OPCODE_SHIFT | @@ -379,7 +379,7 @@ static int aes_set_key(struct tegra_aes_dev *dd) value = aes_readl(dd, TEGRA_AES_INTR_STATUS); eng_busy = value & TEGRA_AES_ENGINE_BUSY_FIELD; icq_empty = value & TEGRA_AES_ICQ_EMPTY_FIELD; - } while (eng_busy & (!icq_empty)); + } while (eng_busy && !icq_empty); return 0; } -- 2.39.2