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crypto: qat - Avoid -Wflex-array-member-not-at-end warnings

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-Wflex-array-member-not-at-end is coming in GCC-14, and we are getting
ready to enable it globally.

Use the `__struct_group()` helper to separate the flexible array
from the rest of the members in flexible `struct qat_alg_buf_list`,
through tagged `struct qat_alg_buf_list_hdr`, and avoid embedding the
flexible-array member in the middle of `struct qat_alg_fixed_buf_list`.

Also, use `container_of()` whenever we need to retrieve a pointer to
the flexible structure.

So, with these changes, fix the following warnings:
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Link: https://github.com/KSPP/linux/issues/202
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gustavo A. R. Silva 2024-03-25 14:44:55 -06:00 committed by Herbert Xu
parent a9a7214053
commit 140e4c85d5
2 changed files with 11 additions and 6 deletions
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6
drivers/crypto/intel/qat/qat_common/qat_bl.c
View File

@ -81,7 +81,8 @@ static int __qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
if (unlikely(!bufl))
return -ENOMEM;
} else {
bufl = &buf->sgl_src.sgl_hdr;
bufl = container_of(&buf->sgl_src.sgl_hdr,
struct qat_alg_buf_list, hdr);
memset(bufl, 0, sizeof(struct qat_alg_buf_list));
buf->sgl_src_valid = true;
}
@ -139,7 +140,8 @@ static int __qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
if (unlikely(!buflout))
goto err_in;
} else {
buflout = &buf->sgl_dst.sgl_hdr;
buflout = container_of(&buf->sgl_dst.sgl_hdr,
struct qat_alg_buf_list, hdr);
memset(buflout, 0, sizeof(struct qat_alg_buf_list));
buf->sgl_dst_valid = true;
}

11
drivers/crypto/intel/qat/qat_common/qat_bl.h
View File

@ -15,14 +15,17 @@ struct qat_alg_buf {
} __packed;
struct qat_alg_buf_list {
u64 resrvd;
u32 num_bufs;
u32 num_mapped_bufs;
/* New members must be added within the __struct_group() macro below. */
__struct_group(qat_alg_buf_list_hdr, hdr, __packed,
u64 resrvd;
u32 num_bufs;
u32 num_mapped_bufs;
);
struct qat_alg_buf buffers[];
} __packed;
struct qat_alg_fixed_buf_list {
struct qat_alg_buf_list sgl_hdr;
struct qat_alg_buf_list_hdr sgl_hdr;
struct qat_alg_buf descriptors[QAT_MAX_BUFF_DESC];
} __packed __aligned(64);