diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2025-04-12 18:57:22 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-10 16:04:54 +0200 |
| commit | 8a039506c0323175eb7e6fd554d59c4b3e03b355 (patch) | |
| tree | b0c86c57ea50d293e55d4b89b3358720975b614e | |
| parent | d78f79a2c1ffc967a219bc0f84908bb7167dad69 (diff) | |
crypto: zynqmp-sha - Add locking
[ Upstream commit c7e68043620e0d5f89a37e573c667beab72d2937 ]
The hardwrae is only capable of one hash at a time, so add a lock
to make sure that it isn't used concurrently.
Fixes: 7ecc3e34474b ("crypto: xilinx - Add Xilinx SHA3 driver")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/crypto/xilinx/zynqmp-sha.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/crypto/xilinx/zynqmp-sha.c b/drivers/crypto/xilinx/zynqmp-sha.c index 1bcec6f46c9c..9b5345068604 100644 --- a/drivers/crypto/xilinx/zynqmp-sha.c +++ b/drivers/crypto/xilinx/zynqmp-sha.c @@ -3,18 +3,19 @@ * Xilinx ZynqMP SHA Driver. * Copyright (c) 2022 Xilinx Inc. */ -#include <linux/cacheflush.h> #include <crypto/hash.h> #include <crypto/internal/hash.h> #include <crypto/sha3.h> -#include <linux/crypto.h> +#include <linux/cacheflush.h> +#include <linux/cleanup.h> #include <linux/device.h> #include <linux/dma-mapping.h> +#include <linux/err.h> #include <linux/firmware/xlnx-zynqmp.h> -#include <linux/init.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/spinlock.h> #include <linux/platform_device.h> #define ZYNQMP_DMA_BIT_MASK 32U @@ -43,6 +44,8 @@ struct zynqmp_sha_desc_ctx { static dma_addr_t update_dma_addr, final_dma_addr; static char *ubuf, *fbuf; +static DEFINE_SPINLOCK(zynqmp_sha_lock); + static int zynqmp_sha_init_tfm(struct crypto_shash *hash) { const char *fallback_driver_name = crypto_shash_alg_name(hash); @@ -124,7 +127,8 @@ static int zynqmp_sha_export(struct shash_desc *desc, void *out) return crypto_shash_export(&dctx->fbk_req, out); } -static int zynqmp_sha_digest(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out) +static int __zynqmp_sha_digest(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) { unsigned int remaining_len = len; int update_size; @@ -159,6 +163,12 @@ static int zynqmp_sha_digest(struct shash_desc *desc, const u8 *data, unsigned i return ret; } +static int zynqmp_sha_digest(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out) +{ + scoped_guard(spinlock_bh, &zynqmp_sha_lock) + return __zynqmp_sha_digest(desc, data, len, out); +} + static struct zynqmp_sha_drv_ctx sha3_drv_ctx = { .sha3_384 = { .init = zynqmp_sha_init, |