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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/firmware/efi/capsule-loader.c
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@@ -1,10 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * EFI capsule loader driver.
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  *
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  * Copyright 2015 Intel Corporation
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- *
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- * This file is part of the Linux kernel, and is made available under
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- * the terms of the GNU General Public License version 2.
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  */
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 #define pr_fmt(fmt) "efi: " fmt
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@@ -13,6 +11,7 @@
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 #include <linux/module.h>
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 #include <linux/miscdevice.h>
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 #include <linux/highmem.h>
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+#include <linux/io.h>
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 #include <linux/slab.h>
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 #include <linux/mutex.h>
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 #include <linux/efi.h>
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@@ -169,7 +168,7 @@
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 static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
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 				 size_t count, loff_t *offp)
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 {
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-	int ret = 0;
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+	int ret;
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 	struct capsule_info *cap_info = file->private_data;
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 	struct page *page;
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 	void *kbuff = NULL;
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@@ -244,29 +243,6 @@
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 }
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 /**
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- * efi_capsule_flush - called by file close or file flush
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- * @file: file pointer
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- * @id: not used
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- *
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- *	If a capsule is being partially uploaded then calling this function
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- *	will be treated as upload termination and will free those completed
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- *	buffer pages and -ECANCELED will be returned.
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- **/
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-static int efi_capsule_flush(struct file *file, fl_owner_t id)
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-{
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-	int ret = 0;
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-	struct capsule_info *cap_info = file->private_data;
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-
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-	if (cap_info->index > 0) {
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-		pr_err("capsule upload not complete\n");
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-		efi_free_all_buff_pages(cap_info);
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-		ret = -ECANCELED;
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-	}
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-
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-	return ret;
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-}
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-
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-/**
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  * efi_capsule_release - called by file close
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  * @inode: not used
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  * @file: file pointer
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@@ -277,6 +253,13 @@
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 static int efi_capsule_release(struct inode *inode, struct file *file)
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 {
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 	struct capsule_info *cap_info = file->private_data;
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+
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+	if (cap_info->index > 0 &&
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+	    (cap_info->header.headersize == 0 ||
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+	     cap_info->count < cap_info->total_size)) {
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+		pr_err("capsule upload not complete\n");
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+		efi_free_all_buff_pages(cap_info);
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+	}
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 	kfree(cap_info->pages);
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 	kfree(cap_info->phys);
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@@ -325,7 +308,6 @@
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 	.owner = THIS_MODULE,
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 	.open = efi_capsule_open,
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 	.write = efi_capsule_write,
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-	.flush = efi_capsule_flush,
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 	.release = efi_capsule_release,
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 	.llseek = no_llseek,
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 };