linux-kernel - Re: [PATCH V4] Fix pointer cast for 32 bits arch

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: <20150418133408.GA442@toshiba-peter.localdomain>
Date:	Sat, 18 Apr 2015 15:34:08 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	Alan Cox <alan@...ux.intel.com>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	driverdevel <devel@...verdev.osuosl.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jun Tian <jun.j.tian@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Garret Kelly <garret.kelly@...il.com>,
	Octavian Purdila <octavian.purdila@...el.com>,
	Andreas <schwab@...ux-m68k.org>, Nick Kralevich <nnk@...gle.com>
Subject: Re: [PATCH V4] Fix pointer cast for 32 bits arch



On Fri, Apr 17, 2015 at 4:10 PM, Alan Cox <alan@...ux.intel.com> wrote:
> On Fri, 2015-04-17 at 16:59 +0300, Dan Carpenter wrote:
>> On Fri, Apr 17, 2015 at 02:31:49PM +0100, Alan Cox wrote:
>> > On Fri, 2015-04-17 at 11:20 +0300, Dan Carpenter wrote:
>> > > Actually, my patch seems like a good idea to me but it's one of those
>> > > things that someone should probably test.  Unless someone can test
>> > > goldfish on a 32 bit system with 64 bit dma addresses
>> >
>> > No such "system" exists.
>>
>> I don't understand.  We definitely can have 64bit dma addresses on
>> x86_32.
>
>
> Yes but no actual Goldfish environment is built that way
Isn't this a simpler fix?

diff --git a/drivers/staging/goldfish/goldfish_nand.c b/drivers/staging/goldfish/goldfish_nand.c
index 213877a..053ac11 100644
--- a/drivers/staging/goldfish/goldfish_nand.c
+++ b/drivers/staging/goldfish/goldfish_nand.c
@@ -87,7 +87,7 @@ static u32 goldfish_nand_cmd(struct mtd_info *mtd, enum nand_cmd cmd,
 		writel((u32)(addr >> 32), base + NAND_ADDR_HIGH);
 		writel((u32)addr, base + NAND_ADDR_LOW);
 		writel(len, base + NAND_TRANSFER_SIZE);
-		gf_write64((u64)ptr, base + NAND_DATA, base + NAND_DATA_HIGH);
+		gf_write64((unsigned long)ptr, base + NAND_DATA, base + NAND_DATA_HIGH);
 		writel(cmd, base + NAND_COMMAND);
 		rv = readl(base + NAND_RESULT);
 	}


-- 
Peter
--
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/