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

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

drivers/net/ethernet/ibm/emac/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -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

drivers/net/ethernet/ibm/emac/core.c

+0 −7
Original line number Diff line number Diff line
@@ -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

deleted100644 → 0
+0 −270
Original line number Diff line number Diff line 
/*

 * 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 */

drivers/net/ethernet/ibm/emac/debug.h

+0 −23
Original line number Diff line number Diff line
@@ -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...) \

drivers/net/ethernet/ibm/emac/mal.c

+0 −4
Original line number Diff line number Diff line
@@ -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 +