linux-kernel - [PATCH] SPI FLASH naming conflicts solving

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-next>] [day] [month] [year] [list]

Message-ID: <46602B2D.7070902@intel.com>
Date:	Fri, 01 Jun 2007 18:20:29 +0400
From:	akorolev <alexey.korolev@...el.com>
To:	dbrownell@...rs.sourceforge.net
CC:	dwmw2@...radead.org, linux-kernel@...r.kernel.org, gregkh@...e.de
Subject: [PATCH] SPI FLASH naming conflicts solving

Hi Dawid

I tried to enable SPI flash device in our development platform (Mainstone).
Since the platform driver uses NOR flash device - it includes 
"include/asm-arm/mach/flash.h" file where the structure "flhash_platform 
_data" is defined.
The structure with the same name "flhash_platform _data" is also defined 
in "include/linux/spi/flash.h".
These structures are different - so they cause compile errors.

I attached the fix for this issue. IMHO it's more preferable to resolve 
issue by minor modification of SPI driver than touching all arm platform 
drivers.

=============================
diff -aur orig/drivers/mtd/devices/m25p80.c new/drivers/mtd/devices/m25p80.c
--- orig/drivers/mtd/devices/m25p80.c	2007-06-01 19:06:52.000000000 +0400
+++ new/drivers/mtd/devices/m25p80.c	2007-05-10 16:56:15.000000000 +0400
@@ -423,7 +449,7 @@
  */
 static int __devinit m25p_probe(struct spi_device *spi)
 {
-	struct flash_platform_data	*data;
+	struct spi_flash_platform_data	*data;
 	struct m25p			*flash;
 	struct flash_info		*info;
 	unsigned			i;
diff -aur orig/drivers/mtd/devices/mtd_dataflash.c new/drivers/mtd/devices/mtd_dataflash.c
--- orig/drivers/mtd/devices/mtd_dataflash.c	2007-06-01 19:06:48.000000000 +0400
+++ new/drivers/mtd/devices/mtd_dataflash.c	2007-05-10 14:41:39.000000000 +0400
@@ -457,7 +457,7 @@
 {
 	struct dataflash		*priv;
 	struct mtd_info			*device;
-	struct flash_platform_data	*pdata = spi->dev.platform_data;
+	struct spi_flash_platform_data	*pdata = spi->dev.platform_data;

 	priv = kzalloc(sizeof *priv, GFP_KERNEL);
=============================
Could you please take a look at this. The fix is simple. If you don't complain could you please include it. 

Thanks,
Alexey

P/S Also I have a question:
I faced rather strange problem with sending read and write commands  to 
SPI  flash. It works Ok if I reverse 32bit SPI FLASH command
I mean - read/write/erase works if to substitute
    flash->command[0] = OPCODE_SE;
    flash->command[1] = offset >> 16;
    flash->command[2] = offset >> 8;
    flash->command[3] = offset;
for
    flash->command[3] = OPCODE_SE;
    flash->command[2] = offset >> 16;
    flash->command[1] = offset >> 8;
    flash->command[0] = offset;
in file drivers/mtd/devices/m25p80.c

It seems pretty strange and may require more investigation.
I wonder If you have any ideas why it could happen? If anybody tested 
m25p80.c driver on LittleEndian platforms?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/