habanalabs: request f/w in separate function

This refactor is needed due to the dynamic FW load in which requesting
the FW file (and getting its attributes) is not immediately followed by
copying FW file content.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

drivers/misc/habanalabs/common/firmware_if.c

@@ -12,6 +12,47 @@
 #include <linux/slab.h>
 
 #define FW_FILE_MAX_SIZE	0x1400000 /* maximum size of 20MB */
+
+static int hl_request_fw(struct hl_device *hdev,
+				const struct firmware **firmware_p,
+				const char *fw_name)
+{
+	size_t fw_size;
+	int rc;
+
+	rc = request_firmware(firmware_p, fw_name, hdev->dev);
+	if (rc) {
+		dev_err(hdev->dev, "Firmware file %s is not found! (error %d)\n",
+				fw_name, rc);
+		goto out;
+	}
+
+	fw_size = (*firmware_p)->size;
+	if ((fw_size % 4) != 0) {
+		dev_err(hdev->dev, "Illegal %s firmware size %zu\n",
+				fw_name, fw_size);
+		rc = -EINVAL;
+		goto release_fw;
+	}
+
+	dev_dbg(hdev->dev, "%s firmware size == %zu\n", fw_name, fw_size);
+
+	if (fw_size > FW_FILE_MAX_SIZE) {
+		dev_err(hdev->dev,
+			"FW file size %zu exceeds maximum of %u bytes\n",
+			fw_size, FW_FILE_MAX_SIZE);
+		rc = -EINVAL;
+		goto release_fw;
+	}
+
+	return 0;
+
+release_fw:
+	release_firmware(*firmware_p);
+out:
+	return rc;
+}
+
 /**
  * hl_fw_load_fw_to_device() - Load F/W code to device's memory.
  *
@@ -33,29 +74,11 @@ int hl_fw_load_fw_to_device(struct hl_device *hdev, const char *fw_name,
 	size_t fw_size;
 	int rc;
 
-	rc = request_firmware(&fw, fw_name, hdev->dev);
-	if (rc) {
-		dev_err(hdev->dev, "Firmware file %s is not found!\n", fw_name);
-		goto out;
-	}
+	rc = hl_request_fw(hdev, &fw, fw_name);
+	if (rc)
+		return rc;
 
 	fw_size = fw->size;
-	if ((fw_size % 4) != 0) {
-		dev_err(hdev->dev, "Illegal %s firmware size %zu\n",
-			fw_name, fw_size);
-		rc = -EINVAL;
-		goto out;
-	}
-
-	dev_dbg(hdev->dev, "%s firmware size == %zu\n", fw_name, fw_size);
-
-	if (fw_size > FW_FILE_MAX_SIZE) {
-		dev_err(hdev->dev,
-			"FW file size %zu exceeds maximum of %u bytes\n",
-			fw_size, FW_FILE_MAX_SIZE);
-		rc = -EINVAL;
-		goto out;
-	}
 
 	if (size - src_offset > fw_size) {
 		dev_err(hdev->dev,