linux-kernel - [PATCH] drm/amd/amdgpu: Properly tune the size of struct

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Date:   Tue, 20 Jun 2023 12:59:19 +0800
From:   Su Hui <suhui@...china.com>
To:     alexander.deucher@....com, airlied@...il.com, Xinhui.Pan@....com,
        daniel@...ll.ch
Cc:     David.Francis@....com, Jane.Jian@....com, Bokun.Zhang@....com,
        monk.liu@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, Su Hui <suhui@...china.com>
Subject: [PATCH] drm/amd/amdgpu: Properly tune the size of struct

Smatch error:
    gpu/drm/amd/amdgpu/amdgv_sriovmsg.h:316:49: error:
    static assertion failed: "amd_sriov_msg_pf2vf_info must be 1 KB"
    static assertion failed: "amd_sriov_msg_vf2pf_info must be 1 KB"

Fixes: 1721bc1b2afa ("drm/amdgpu: Update VF2PF interface")
Signed-off-by: Su Hui <suhui@...china.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h b/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h
index 24d42d24e6a0..a482b422fed2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h
@@ -177,10 +177,10 @@ struct amd_sriov_msg_pf2vf_info {
 	uint64_t mecfw_offset;
 	/* MEC FW size in BYTE */
 	uint32_t mecfw_size;
-	/* UVD FW position in BYTE from the start of VF visible frame buffer */
-	uint64_t uvdfw_offset;
 	/* UVD FW size in BYTE */
 	uint32_t uvdfw_size;
+	/* UVD FW position in BYTE from the start of VF visible frame buffer */
+	uint64_t uvdfw_offset;
 	/* VCE FW position in BYTE from the start of VF visible frame buffer */
 	uint64_t vcefw_offset;
 	/* VCE FW size in BYTE */
@@ -193,8 +193,8 @@ struct amd_sriov_msg_pf2vf_info {
 	/* frequency for VF to update the VF2PF area in msec, 0 = manual */
 	uint32_t vf2pf_update_interval_ms;
 	/* identification in ROCm SMI */
-	uint64_t uuid;
 	uint32_t fcn_idx;
+	uint64_t uuid;
 	/* flags to indicate which register access method VF should use */
 	union amd_sriov_reg_access_flags reg_access_flags;
 	/* MM BW management */
@@ -263,7 +263,7 @@ struct amd_sriov_msg_vf2pf_info {
 	struct {
 		uint8_t id;
 		uint32_t version;
-	} ucode_info[AMD_SRIOV_MSG_RESERVE_UCODE];
+	} __packed ucode_info[AMD_SRIOV_MSG_RESERVE_UCODE];
 	uint64_t dummy_page_addr;
 
 	/* reserved */
-- 
2.30.2