From ea08eeccae9297f7aabd2ef7f0c2517ac4549acc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:18:26 +0000
Subject: [PATCH] write in 30M
---
kernel/drivers/mcb/mcb-pci.c | 33 +++++++++++++++++++++++++++------
1 files changed, 27 insertions(+), 6 deletions(-)
diff --git a/kernel/drivers/mcb/mcb-pci.c b/kernel/drivers/mcb/mcb-pci.c
index c2d69e3..53d9202 100644
--- a/kernel/drivers/mcb/mcb-pci.c
+++ b/kernel/drivers/mcb/mcb-pci.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* MEN Chameleon Bus.
*
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
* Author: Johannes Thumshirn <johannes.thumshirn@men.de>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; version 2 of the License.
*/
#include <linux/module.h>
@@ -34,7 +31,7 @@
{
struct resource *res;
struct priv *priv;
- int ret;
+ int ret, table_size;
unsigned long flags;
priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL);
@@ -93,7 +90,30 @@
if (ret < 0)
goto out_mcb_bus;
- dev_dbg(&pdev->dev, "Found %d cells\n", ret);
+ table_size = ret;
+
+ if (table_size < CHAM_HEADER_SIZE) {
+ /* Release the previous resources */
+ devm_iounmap(&pdev->dev, priv->base);
+ devm_release_mem_region(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE);
+
+ /* Then, allocate it again with the actual chameleon table size */
+ res = devm_request_mem_region(&pdev->dev, priv->mapbase,
+ table_size,
+ KBUILD_MODNAME);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to request PCI memory\n");
+ ret = -EBUSY;
+ goto out_mcb_bus;
+ }
+
+ priv->base = devm_ioremap(&pdev->dev, priv->mapbase, table_size);
+ if (!priv->base) {
+ dev_err(&pdev->dev, "Cannot ioremap\n");
+ ret = -ENOMEM;
+ goto out_mcb_bus;
+ }
+ }
mcb_bus_add_devices(priv->bus);
@@ -134,3 +154,4 @@
MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MCB over PCI support");
+MODULE_IMPORT_NS(MCB);
--
Gitblit v1.6.2