From afdddabc0c40453f490eb0aacade35d864b05643 Mon Sep 17 00:00:00 2001
From: moosecrap <admin@long-cat.net>
Date: Sat, 1 Feb 2025 00:29:48 -0800
Subject: [PATCH] Only read Nvidia i2c devices

---
 evga-card.c | 18 +++++++++++++++---
 evga-card.h |  2 +-
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/evga-card.c b/evga-card.c
index 1cecfe4..88102b3 100644
--- a/evga-card.c
+++ b/evga-card.c
@@ -13,6 +13,7 @@ int find_evga_gpu_i2cs(struct card_info *infos, int max_gpus)
 	char i2c_devices_path[NAME_MAX];
 	char device_path[NAME_MAX];
 	char dev_file[NAME_MAX];
+	char *pci_addr;
 
 	FILE *test_fd;
 	DIR *dir;
@@ -39,6 +40,11 @@ int find_evga_gpu_i2cs(struct card_info *infos, int max_gpus)
 		strcpy(device_path, i2c_devices_path);
 		strcat(device_path, ent->d_name);
 		
+		/* Only check Nvidia devices */
+		pci_addr = read_nvidia_pci_address(device_path);
+		if (pci_addr == NULL)
+			continue;
+		
 		/* Read the PCI info for the underlying device */
 		pci_vendor           = read_pci_id(device_path, "/device/vendor");
 		pci_device           = read_pci_id(device_path, "/device/device");
@@ -59,7 +65,7 @@ int find_evga_gpu_i2cs(struct card_info *infos, int max_gpus)
 				if (check_for_icx3(dev_file)) {
 					/* Write our card info into the provided struct array */
 					infos[num_gpus].card_name = evga_pci_ids[i].card_name;
-					infos[num_gpus].pci_id = read_nvidia_pci_address(device_path);
+					infos[num_gpus].pci_id = pci_addr;
 					infos[num_gpus].i2c_dev_path = calloc(strlen(dev_file) + 1, sizeof(char));
 					strcpy(infos[num_gpus].i2c_dev_path, dev_file);
 					num_gpus++;
@@ -111,12 +117,18 @@ char *read_nvidia_pci_address(char *device_path)
 	
 	FILE *fp = fopen(file_path, "r");
 	
-	if (fp == NULL)
+	if (fp == NULL) {
+		free(ret);
 		return NULL;
+	}
 	
 	fscanf(fp, "NVIDIA i2c adapter %*u at %16s", ret);
-	
 	fclose(fp);
 	
+	if (strlen(ret) == 0) {
+		free(ret);
+		return NULL;
+	}
+	
 	return ret;
 }
diff --git a/evga-card.h b/evga-card.h
index 6a0569c..f8a10d3 100644
--- a/evga-card.h
+++ b/evga-card.h
@@ -84,7 +84,7 @@ struct card_info {
 	char *card_name;
 	char *pci_id;
 	char *i2c_dev_path;
-	int fd;
+	int i2c_fd;
 };
 
 struct gpu_pci_info {