From b43090dbc638785733b764550d4a05e840820a64 Mon Sep 17 00:00:00 2001
From: Luben Tuikov <luben.tuikov@amd.com>
Date: Thu, 3 Feb 2022 19:05:20 -0500
Subject: drm/amdgpu: Don't offset by 2 in FRU EEPROM
Git-commit: 3f3a24a0a3a58677d2b4f3c442d7a1be05afb123
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Read buffers no longer expose the I2C address, and so we don't need to
offset by two when we get the read data.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Kent Russell <kent.russell@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Fixes: bd607166af7fe3 ("drm/amdgpu: Enable reading FRU chip via I2C v3")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
index 792337433a9e..61c4e71e3998 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
@@ -103,17 +103,13 @@ static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
 
 int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 {
-	unsigned char buf[AMDGPU_PRODUCT_NAME_LEN+2];
+	unsigned char buf[AMDGPU_PRODUCT_NAME_LEN];
 	u32 addrptr;
 	int size, len;
-	int offset = 2;
 
 	if (!is_fru_eeprom_supported(adev))
 		return 0;
 
-	if (adev->asic_type == CHIP_ALDEBARAN)
-		offset = 0;
-
 	/* If algo exists, it means that the i2c_adapter's initialized */
 	if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
 		DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
@@ -155,8 +151,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 				AMDGPU_PRODUCT_NAME_LEN);
 		len = AMDGPU_PRODUCT_NAME_LEN - 1;
 	}
-	/* Start at 2 due to buf using fields 0 and 1 for the address */
-	memcpy(adev->product_name, &buf[offset], len);
+	memcpy(adev->product_name, buf, len);
 	adev->product_name[len] = '\0';
 
 	addrptr += size + 1;
@@ -174,7 +169,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 		DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
 		len = sizeof(adev->product_number) - 1;
 	}
-	memcpy(adev->product_number, &buf[offset], len);
+	memcpy(adev->product_number, buf, len);
 	adev->product_number[len] = '\0';
 
 	addrptr += size + 1;
@@ -201,7 +196,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 		DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
 		len = sizeof(adev->serial) - 1;
 	}
-	memcpy(adev->serial, &buf[offset], len);
+	memcpy(adev->serial, buf, len);
 	adev->serial[len] = '\0';
 
 	return 0;
-- 
2.38.1