| 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
| ||
|
Message-ID: <l2k10f740e81004151234t3004275az36e7873493067a8a@mail.gmail.com>
Date: Thu, 15 Apr 2010 21:34:45 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Joe Perches <joe@...ches.com>,
Finn Thain <fthain@...egraphics.com.au>
Cc: "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"Linux/m68k" <linux-m68k@...r.kernel.org>
Subject: [PATCH] net: mac8390 - Sort out memory/MMIO accesses and casts (was:
Re: drivers/net/mac8390.c: Remove useless memcpy casting)
On Mon, Mar 8, 2010 at 18:16, Joe Perches <joe@...ches.com> wrote:
> On Sun, 2010-03-07 at 10:19 +0100, Geert Uytterhoeven wrote:
>> ... hence you introduced 3 compiler warnings:
>>
>> drivers/net/mac8390.c:249: warning: passing argument 1 of
>> '__builtin_memcpy' makes pointer from integer without a cast
>> drivers/net/mac8390.c:254: warning: passing argument 1 of
>> 'word_memcpy_tocard' makes pointer from integer without a cast
>> drivers/net/mac8390.c:256: warning: passing argument 2 of
>> 'word_memcpy_fromcard' makes pointer from integer without a cast
>
> Thanks, I'll submit a patch to fix it by tomorrow or so.
It hasn't been fixed yet. But here's a better solution.
I do not have the hardware to test it, though.
Finn, does it {look OK,work}?
>From 7ef849741922afa7b613f271f414024c454a0d23 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert@...ux-m68k.org>
Date: Wed, 14 Apr 2010 18:48:50 +0200
Subject: [PATCH] net: mac8390 - Sort out memory/MMIO accesses and casts
commit 5c7fffd0e3b57cb63f50bbd710868f012d67654f ("drivers/net/mac8390.c: Remove
useless memcpy casting") removed too many casts, introducing the following
warnings:
| drivers/net/mac8390.c:248: warning: passing argument 1 of
'__builtin_memcpy' makes pointer from integer without a cast
| drivers/net/mac8390.c:253: warning: passing argument 1 of
'word_memcpy_tocard' makes pointer from integer without a cast
| drivers/net/mac8390.c:255: warning: passing argument 2 of
'word_memcpy_fromcard' makes pointer from integer without a cast
Instead of just readding the casts,
- move all casts inside word_memcpy_{to,from}card(),
- replace an incorrect memcpy() by memcpy_toio(),
- add memcmp_withio() as a wrapper around memcmp(),
- replace an incorrect memcpy_toio() by memcpy_fromio().
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
drivers/net/mac8390.c | 44 ++++++++++++++++++++++----------------------
1 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/drivers/net/mac8390.c b/drivers/net/mac8390.c
index c8e68fd..8c96e9c 100644
--- a/drivers/net/mac8390.c
+++ b/drivers/net/mac8390.c
@@ -157,6 +157,8 @@ static void dayna_block_output(struct net_device
*dev, int count,
#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
+#define memcmp_withio(a, b, c) memcmp((a), (void *)(b), (c))
+
/* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
static void slow_sane_get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr, int ring_page);
@@ -164,8 +166,8 @@ static void slow_sane_block_input(struct
net_device *dev, int count,
struct sk_buff *skb, int ring_offset);
static void slow_sane_block_output(struct net_device *dev, int count,
const unsigned char *buf, int start_page);
-static void word_memcpy_tocard(void *tp, const void *fp, int count);
-static void word_memcpy_fromcard(void *tp, const void *fp, int count);
+static void word_memcpy_tocard(unsigned long tp, const void *fp, int count);
+static void word_memcpy_fromcard(void *tp, unsigned long fp, int count);
static enum mac8390_type __init mac8390_ident(struct nubus_dev *dev)
{
@@ -245,9 +247,9 @@ static enum mac8390_access __init
mac8390_testio(volatile unsigned long membase)
unsigned long outdata = 0xA5A0B5B0;
unsigned long indata = 0x00000000;
/* Try writing 32 bits */
- memcpy(membase, &outdata, 4);
+ memcpy_toio(membase, &outdata, 4);
/* Now compare them */
- if (memcmp((char *)&outdata, (char *)membase, 4) == 0)
+ if (memcmp_withio(&outdata, membase, 4) == 0)
return ACCESS_32;
/* Write 16 bit output */
word_memcpy_tocard(membase, &outdata, 4);
@@ -733,7 +735,7 @@ static void sane_get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr, int ring_page)
{
unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
- memcpy_fromio((void *)hdr, (char *)dev->mem_start + hdr_start, 4);
+ memcpy_fromio(hdr, dev->mem_start + hdr_start, 4);
/* Fix endianness */
hdr->count = swab16(hdr->count);
}
@@ -747,14 +749,13 @@ static void sane_block_input(struct net_device
*dev, int count,
if (xfer_start + count > ei_status.rmem_end) {
/* We must wrap the input move. */
int semi_count = ei_status.rmem_end - xfer_start;
- memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base,
+ memcpy_fromio(skb->data, dev->mem_start + xfer_base,
semi_count);
count -= semi_count;
- memcpy_toio(skb->data + semi_count,
- (char *)ei_status.rmem_start, count);
- } else {
- memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base,
+ memcpy_fromio(skb->data + semi_count, ei_status.rmem_start,
count);
+ } else {
+ memcpy_fromio(skb->data, dev->mem_start + xfer_base, count);
}
}
@@ -763,7 +764,7 @@ static void sane_block_output(struct net_device
*dev, int count,
{
long shmem = (start_page - WD_START_PG)<<8;
- memcpy_toio((char *)dev->mem_start + shmem, buf, count);
+ memcpy_toio(dev->mem_start + shmem, buf, count);
}
/* dayna block input/output */
@@ -814,7 +815,7 @@ static void slow_sane_get_8390_hdr(struct net_device *dev,
int ring_page)
{
unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
- word_memcpy_fromcard(hdr, (char *)dev->mem_start + hdr_start, 4);
+ word_memcpy_fromcard(hdr, dev->mem_start + hdr_start, 4);
/* Register endianism - fix here rather than 8390.c */
hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
}
@@ -828,15 +829,14 @@ static void slow_sane_block_input(struct
net_device *dev, int count,
if (xfer_start + count > ei_status.rmem_end) {
/* We must wrap the input move. */
int semi_count = ei_status.rmem_end - xfer_start;
- word_memcpy_fromcard(skb->data,
- (char *)dev->mem_start + xfer_base,
+ word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
semi_count);
count -= semi_count;
word_memcpy_fromcard(skb->data + semi_count,
- (char *)ei_status.rmem_start, count);
+ ei_status.rmem_start, count);
} else {
- word_memcpy_fromcard(skb->data,
- (char *)dev->mem_start + xfer_base, count);
+ word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
+ count);
}
}
@@ -845,12 +845,12 @@ static void slow_sane_block_output(struct
net_device *dev, int count,
{
long shmem = (start_page - WD_START_PG)<<8;
- word_memcpy_tocard((char *)dev->mem_start + shmem, buf, count);
+ word_memcpy_tocard(dev->mem_start + shmem, buf, count);
}
-static void word_memcpy_tocard(void *tp, const void *fp, int count)
+static void word_memcpy_tocard(unsigned long tp, const void *fp, int count)
{
- volatile unsigned short *to = tp;
+ volatile unsigned short *to = (void *)tp;
const unsigned short *from = fp;
count++;
@@ -860,10 +860,10 @@ static void word_memcpy_tocard(void *tp, const
void *fp, int count)
*to++ = *from++;
}
-static void word_memcpy_fromcard(void *tp, const void *fp, int count)
+static void word_memcpy_fromcard(void *tp, unsigned long fp, int count)
{
unsigned short *to = tp;
- const volatile unsigned short *from = fp;
+ const volatile unsigned short *from = (const void *)fp;
count++;
count /= 2;
--
1.6.0.4
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
--
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/
Powered by blists - more mailing lists