lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20231217103012.41273-3-o-takashi@sakamocchi.jp>
Date: Sun, 17 Dec 2023 19:30:05 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Cc: adamg@...ox.com
Subject: [RFC PATCH 2/8] firewire: core: replace magic number with macro

In IEEE 1394 specification, the size of bus information block of
configuration ROM is fixed to 5, thus the offset of root directory is 5.
Current implementation to handle device structures has the hard-coded
offset.

This commit replaces the offset with macro.

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/core-device.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 16c32cb38f0f..137001f8a695 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -31,6 +31,8 @@
 
 #include "core.h"
 
+#define ROOT_DIR_OFFSET	5
+
 void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p)
 {
 	ci->p = p + 1;
@@ -135,7 +137,7 @@ static void get_ids(const u32 *directory, int *id)
 
 static void get_modalias_ids(const struct fw_unit *unit, int *id)
 {
-	get_ids(&fw_parent_device(unit)->config_rom[5], id);
+	get_ids(&fw_parent_device(unit)->config_rom[ROOT_DIR_OFFSET], id);
 	get_ids(unit->directory, id);
 }
 
@@ -259,7 +261,7 @@ static ssize_t show_immediate(struct device *dev,
 	if (is_fw_unit(dev))
 		dir = fw_unit(dev)->directory;
 	else
-		dir = fw_device(dev)->config_rom + 5;
+		dir = fw_device(dev)->config_rom + ROOT_DIR_OFFSET;
 
 	fw_csr_iterator_init(&ci, dir);
 	while (fw_csr_iterator_next(&ci, &key, &value))
@@ -292,7 +294,7 @@ static ssize_t show_text_leaf(struct device *dev,
 	if (is_fw_unit(dev))
 		dir = fw_unit(dev)->directory;
 	else
-		dir = fw_device(dev)->config_rom + 5;
+		dir = fw_device(dev)->config_rom + ROOT_DIR_OFFSET;
 
 	if (buf) {
 		bufsize = PAGE_SIZE - 1;
@@ -446,7 +448,7 @@ static ssize_t units_show(struct device *dev,
 	int key, value, i = 0;
 
 	down_read(&fw_device_rwsem);
-	fw_csr_iterator_init(&ci, &device->config_rom[5]);
+	fw_csr_iterator_init(&ci, &device->config_rom[ROOT_DIR_OFFSET]);
 	while (fw_csr_iterator_next(&ci, &key, &value)) {
 		if (key != (CSR_UNIT | CSR_DIRECTORY))
 			continue;
@@ -691,7 +693,7 @@ static void create_units(struct fw_device *device)
 	int key, value, i;
 
 	i = 0;
-	fw_csr_iterator_init(&ci, &device->config_rom[5]);
+	fw_csr_iterator_init(&ci, &device->config_rom[ROOT_DIR_OFFSET]);
 	while (fw_csr_iterator_next(&ci, &key, &value)) {
 		if (key != (CSR_UNIT | CSR_DIRECTORY))
 			continue;
-- 
2.39.2


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ