Commit 5e351410 authored by Eric Biggers's avatar Eric Biggers Committed by David S. Miller

net: ibm: emac: remove unused sysrq handler for 'c' key

Since commit d6580a9f ("kexec: sysrq: simplify sysrq-c handler"),
the sysrq handler for the 'c' key has been sysrq_crash_op.  Debugging
code in the ibm_emac driver also tries to register a handler for the 'c'
key, but this has no effect because register_sysrq_key() doesn't replace
existing handlers.  Since evidently no one has cared enough to fix this
in the last 8 years, and it's very rare for drivers to register sysrq
handlers (for good reason), just remove the dead code.
Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3f3c278c
......@@ -8,4 +8,3 @@ ibm_emac-y := mal.o core.o phy.o
ibm_emac-$(CONFIG_IBM_EMAC_ZMII) += zmii.o
ibm_emac-$(CONFIG_IBM_EMAC_RGMII) += rgmii.o
ibm_emac-$(CONFIG_IBM_EMAC_TAH) += tah.o
ibm_emac-$(CONFIG_IBM_EMAC_DEBUG) += debug.o
......@@ -3173,8 +3173,6 @@ static int emac_probe(struct platform_device *ofdev)
printk("%s: found %s PHY (0x%02x)\n", ndev->name,
dev->phy.def->name, dev->phy.address);
emac_dbg_register(dev);
/* Life is good */
return 0;
......@@ -3243,7 +3241,6 @@ static int emac_remove(struct platform_device *ofdev)
mal_unregister_commac(dev->mal, &dev->commac);
emac_put_deps(dev);
emac_dbg_unregister(dev);
iounmap(dev->emacp);
if (dev->wol_irq)
......@@ -3326,9 +3323,6 @@ static int __init emac_init(void)
printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
/* Init debug stuff */
emac_init_debug();
/* Build EMAC boot list */
emac_make_bootlist();
......@@ -3373,7 +3367,6 @@ static void __exit emac_exit(void)
rgmii_exit();
zmii_exit();
mal_exit();
emac_fini_debug();
/* Destroy EMAC boot list */
for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
......
/*
* drivers/net/ethernet/ibm/emac/debug.c
*
* Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
*
* Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
*
* Based on the arch/ppc version of the driver:
*
* Copyright (c) 2004, 2005 Zultys Technologies
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/sysrq.h>
#include <asm/io.h>
#include "core.h"
static DEFINE_SPINLOCK(emac_dbg_lock);
static void emac_desc_dump(struct emac_instance *p)
{
int i;
printk("** EMAC %s TX BDs **\n"
" tx_cnt = %d tx_slot = %d ack_slot = %d\n",
p->ofdev->dev.of_node->full_name,
p->tx_cnt, p->tx_slot, p->ack_slot);
for (i = 0; i < NUM_TX_BUFF / 2; ++i)
printk
("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ',
p->tx_desc[i].ctrl, p->tx_desc[i].data_len,
NUM_TX_BUFF / 2 + i,
p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr,
p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ',
p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl,
p->tx_desc[NUM_TX_BUFF / 2 + i].data_len);
printk("** EMAC %s RX BDs **\n"
" rx_slot = %d flags = 0x%lx rx_skb_size = %d rx_sync_size = %d\n"
" rx_sg_skb = 0x%p\n",
p->ofdev->dev.of_node->full_name,
p->rx_slot, p->commac.flags, p->rx_skb_size,
p->rx_sync_size, p->rx_sg_skb);
for (i = 0; i < NUM_RX_BUFF / 2; ++i)
printk
("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ',
p->rx_desc[i].ctrl, p->rx_desc[i].data_len,
NUM_RX_BUFF / 2 + i,
p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr,
p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ',
p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl,
p->rx_desc[NUM_RX_BUFF / 2 + i].data_len);
}
static void emac_mac_dump(struct emac_instance *dev)
{
struct emac_regs __iomem *p = dev->emacp;
const int xaht_regs = EMAC_XAHT_REGS(dev);
u32 *gaht_base = emac_gaht_base(dev);
u32 *iaht_base = emac_iaht_base(dev);
int emac4sync = emac_has_feature(dev, EMAC_FTR_EMAC4SYNC);
int n;
printk("** EMAC %s registers **\n"
"MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
"RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
"IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n",
dev->ofdev->dev.of_node->full_name,
in_be32(&p->mr0), in_be32(&p->mr1),
in_be32(&p->tmr0), in_be32(&p->tmr1),
in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
in_be32(&p->vtci)
);
if (emac4sync)
printk("MAR = %04x%08x MMAR = %04x%08x\n",
in_be32(&p->u0.emac4sync.mahr),
in_be32(&p->u0.emac4sync.malr),
in_be32(&p->u0.emac4sync.mmahr),
in_be32(&p->u0.emac4sync.mmalr)
);
for (n = 0; n < xaht_regs; n++)
printk("IAHT%02d = 0x%08x\n", n + 1, in_be32(iaht_base + n));
for (n = 0; n < xaht_regs; n++)
printk("GAHT%02d = 0x%08x\n", n + 1, in_be32(gaht_base + n));
printk("LSA = %04x%08x IPGVR = 0x%04x\n"
"STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
"OCTX = 0x%08x OCRX = 0x%08x\n",
in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
in_be32(&p->octx), in_be32(&p->ocrx)
);
if (!emac4sync) {
printk("IPCR = 0x%08x\n",
in_be32(&p->u1.emac4.ipcr)
);
} else {
printk("REVID = 0x%08x TPC = 0x%08x\n",
in_be32(&p->u1.emac4sync.revid),
in_be32(&p->u1.emac4sync.tpc)
);
}
emac_desc_dump(dev);
}
static void emac_mal_dump(struct mal_instance *mal)
{
int i;
printk("** MAL %s Registers **\n"
"CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
"TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
"RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
mal->ofdev->dev.of_node->full_name,
get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
get_mal_dcrn(mal, MAL_IER),
get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
);
printk("TX|");
for (i = 0; i < mal->num_tx_chans; ++i) {
if (i && !(i % 4))
printk("\n ");
printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
}
printk("\nRX|");
for (i = 0; i < mal->num_rx_chans; ++i) {
if (i && !(i % 4))
printk("\n ");
printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
}
printk("\n ");
for (i = 0; i < mal->num_rx_chans; ++i) {
u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
if (i && !(i % 3))
printk("\n ");
printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
}
printk("\n");
}
static struct emac_instance *__emacs[4];
static struct mal_instance *__mals[1];
void emac_dbg_register(struct emac_instance *dev)
{
unsigned long flags;
int i;
spin_lock_irqsave(&emac_dbg_lock, flags);
for (i = 0; i < ARRAY_SIZE(__emacs); i++)
if (__emacs[i] == NULL) {
__emacs[i] = dev;
break;
}
spin_unlock_irqrestore(&emac_dbg_lock, flags);
}
void emac_dbg_unregister(struct emac_instance *dev)
{
unsigned long flags;
int i;
spin_lock_irqsave(&emac_dbg_lock, flags);
for (i = 0; i < ARRAY_SIZE(__emacs); i++)
if (__emacs[i] == dev) {
__emacs[i] = NULL;
break;
}
spin_unlock_irqrestore(&emac_dbg_lock, flags);
}
void mal_dbg_register(struct mal_instance *mal)
{
unsigned long flags;
int i;
spin_lock_irqsave(&emac_dbg_lock, flags);
for (i = 0; i < ARRAY_SIZE(__mals); i++)
if (__mals[i] == NULL) {
__mals[i] = mal;
break;
}
spin_unlock_irqrestore(&emac_dbg_lock, flags);
}
void mal_dbg_unregister(struct mal_instance *mal)
{
unsigned long flags;
int i;
spin_lock_irqsave(&emac_dbg_lock, flags);
for (i = 0; i < ARRAY_SIZE(__mals); i++)
if (__mals[i] == mal) {
__mals[i] = NULL;
break;
}
spin_unlock_irqrestore(&emac_dbg_lock, flags);
}
void emac_dbg_dump_all(void)
{
unsigned int i;
unsigned long flags;
spin_lock_irqsave(&emac_dbg_lock, flags);
for (i = 0; i < ARRAY_SIZE(__mals); ++i)
if (__mals[i])
emac_mal_dump(__mals[i]);
for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
if (__emacs[i])
emac_mac_dump(__emacs[i]);
spin_unlock_irqrestore(&emac_dbg_lock, flags);
}
#if defined(CONFIG_MAGIC_SYSRQ)
static void emac_sysrq_handler(int key)
{
emac_dbg_dump_all();
}
static struct sysrq_key_op emac_sysrq_op = {
.handler = emac_sysrq_handler,
.help_msg = "emac(c)",
.action_msg = "Show EMAC(s) status",
};
int __init emac_init_debug(void)
{
return register_sysrq_key('c', &emac_sysrq_op);
}
void __exit emac_fini_debug(void)
{
unregister_sysrq_key('c', &emac_sysrq_op);
}
#else
int __init emac_init_debug(void)
{
return 0;
}
void __exit emac_fini_debug(void)
{
}
#endif /* CONFIG_MAGIC_SYSRQ */
......@@ -25,32 +25,9 @@
#include "core.h"
#if defined(CONFIG_IBM_EMAC_DEBUG)
struct emac_instance;
struct mal_instance;
void emac_dbg_register(struct emac_instance *dev);
void emac_dbg_unregister(struct emac_instance *dev);
void mal_dbg_register(struct mal_instance *mal);
void mal_dbg_unregister(struct mal_instance *mal);
int emac_init_debug(void) __init;
void emac_fini_debug(void) __exit;
void emac_dbg_dump_all(void);
# define DBG_LEVEL 1
#else
# define emac_dbg_register(x) do { } while(0)
# define emac_dbg_unregister(x) do { } while(0)
# define mal_dbg_register(x) do { } while(0)
# define mal_dbg_unregister(x) do { } while(0)
# define emac_init_debug() do { } while(0)
# define emac_fini_debug() do { } while(0)
# define emac_dbg_dump_all() do { } while(0)
# define DBG_LEVEL 0
#endif
#define EMAC_DBG(d, name, fmt, arg...) \
......
......@@ -695,8 +695,6 @@ static int mal_probe(struct platform_device *ofdev)
wmb();
platform_set_drvdata(ofdev, mal);
mal_dbg_register(mal);
return 0;
fail6:
......@@ -740,8 +738,6 @@ static int mal_remove(struct platform_device *ofdev)
mal_reset(mal);
mal_dbg_unregister(mal);
dma_free_coherent(&ofdev->dev,
sizeof(struct mal_descriptor) *
(NUM_TX_BUFF * mal->num_tx_chans +
......
......@@ -446,7 +446,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
*/
NULL, /* a */
&sysrq_reboot_op, /* b */
&sysrq_crash_op, /* c & ibm_emac driver debug */
&sysrq_crash_op, /* c */
&sysrq_showlocks_op, /* d */
&sysrq_term_op, /* e */
&sysrq_moom_op, /* f */
......
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