drm/amdgpu/pp/smu7: use a local variable for toc indexing

Rather than using the index variable stored in vram.  If
the device fails to come back online after a resume cycle,
reads from vram will return all 1s which will cause a
segfault. Based on a patch from Thomas Martitz <kugel@rockbox.org>.
This avoids the segfault, but we still need to sort out
why the GPU does not come back online after a resume.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=105760
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c b/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
index d644a9b..9f407c4 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
@@ -381,6 +381,7 @@ int smu7_request_smu_load_fw(struct pp_hwmgr *hwmgr)
        uint32_t fw_to_load;
        int result = 0;
        struct SMU_DRAMData_TOC *toc;
+       uint32_t num_entries = 0;
 
        if (!hwmgr->reload_fw) {
                pr_info("skip reloading...\n");
@@ -422,41 +423,41 @@ int smu7_request_smu_load_fw(struct pp_hwmgr *hwmgr)
        }
 
        toc = (struct SMU_DRAMData_TOC *)smu_data->header;
-       toc->num_entries = 0;
        toc->structure_version = 1;
 
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_RLC_G, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_RLC_G, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_CP_CE, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_CP_CE, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_CP_PFP, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_CP_PFP, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_CP_ME, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_CP_ME, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_CP_MEC, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_CP_MEC, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_CP_MEC_JT1, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_CP_MEC_JT1, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_CP_MEC_JT2, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_CP_MEC_JT2, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_SDMA0, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_SDMA0, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_SDMA1, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_SDMA1, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
        if (!hwmgr->not_vf)
                PP_ASSERT_WITH_CODE(0 == smu7_populate_single_firmware_entry(hwmgr,
-                               UCODE_ID_MEC_STORAGE, &toc->entry[toc->num_entries++]),
+                               UCODE_ID_MEC_STORAGE, &toc->entry[num_entries++]),
                                "Failed to Get Firmware Entry.", return -EINVAL);
 
+       toc->num_entries = num_entries;
        smu7_send_msg_to_smc_with_parameter(hwmgr, PPSMC_MSG_DRV_DRAM_ADDR_HI, upper_32_bits(smu_data->header_buffer.mc_addr));
        smu7_send_msg_to_smc_with_parameter(hwmgr, PPSMC_MSG_DRV_DRAM_ADDR_LO, lower_32_bits(smu_data->header_buffer.mc_addr));