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[PATCH] fix up newly added jsm driver

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- plug various leaks and use after frees in the remove and
   initialization failure path (some still left)
 - remove useless global list of boards and use pci_set_drvdata instead
 - unobsfucate init path by merging functions together
 - kill various totally useless state variables
 - .. probably more I forgot

Note that the tty part still generates lots of sparse warnings and there's
still a totally useless layer of function pointer indirections, but maybe
someone else will fix that bit up.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Hellwig 2005-04-16 15:25:44 -07:00 committed by Linus Torvalds
parent a299738283
commit 614a7d6a76
3 changed files with 92 additions and 312 deletions
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38
drivers/serial/jsm/jsm.h
View File

@ -93,28 +93,6 @@ enum {
#define JSM_VERSION "jsm: 1.1-1-INKERNEL"
#define JSM_PARTNUM "40002438_A-INKERNEL"
/*
* All the possible states the driver can be while being loaded.
*/
enum {
DRIVER_INITIALIZED = 0,
DRIVER_READY
};
/*
* All the possible states the board can be while booting up.
*/
enum {
BOARD_FAILED = 0,
BOARD_FOUND,
BOARD_READY
};
struct board_id {
u8 *name;
u32 maxports;
};
struct jsm_board;
struct jsm_channel;
@ -149,7 +127,6 @@ struct jsm_board
int boardnum; /* Board number: 0-32 */
int type; /* Type of board */
char *name; /* Product Name */
u8 rev; /* PCI revision ID */
struct pci_dev *pci_dev;
u32 maxports; /* MAX ports this board can handle */
@ -160,9 +137,6 @@ struct jsm_board
* the interrupt routine from each other.
*/
u32 state; /* State of card. */
wait_queue_head_t state_wait; /* Place to sleep on for state change */
u32 nasync; /* Number of ports on card */
u32 irq; /* Interrupt request number */
@ -181,9 +155,6 @@ struct jsm_board
struct jsm_channel *channels[MAXPORTS]; /* array of pointers to our channels. */
char *flipbuf; /* Our flip buffer, alloced if board is found */
u16 dpatype; /* The board "type", as defined by DPA */
u16 dpastatus; /* The board "status", as defined by DPA */
u32 bd_dividend; /* Board/UARTs specific dividend */
struct board_ops *bd_ops;
@ -412,12 +383,6 @@ extern struct board_ops jsm_neo_ops;
extern int jsm_debug;
extern int jsm_rawreadok;
extern int jsm_driver_state; /* The state of the driver */
extern char *jsm_driver_state_text[];/* Array of driver state text */
extern spinlock_t jsm_board_head_lock;
extern struct list_head jsm_board_head;
/*************************************************************************
*
* Prototypes for non-static functions used in more than one module
@ -431,7 +396,4 @@ void jsm_input(struct jsm_channel *ch);
void jsm_carrier(struct jsm_channel *ch);
void jsm_check_queue_flow_control(struct jsm_channel *ch);
void jsm_create_driver_sysfiles(struct device_driver *);
void jsm_remove_driver_sysfiles(struct device_driver *);
#endif

342
drivers/serial/jsm/jsm_driver.c
View File

@ -29,7 +29,9 @@
#include "jsm.h"
MODULE_AUTHOR("Digi International, http://www.digi.com");
MODULE_DESCRIPTION("Driver for the Digi International Neo PCI based product line");
MODULE_DESCRIPTION("Driver for the Digi International "
"Neo PCI based product line");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("jsm");
#define JSM_DRIVER_NAME "jsm"
@ -43,7 +45,6 @@ struct uart_driver jsm_uart_driver = {
.major = 253,
.minor = JSM_MINOR_START,
.nr = NR_PORTS,
.cons = NULL,
};
int jsm_debug;
@ -53,193 +54,99 @@ module_param(jsm_rawreadok, int, 0);
MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
MODULE_PARM_DESC(jsm_rawreadok, "Bypass flip buffers on input");
/*
* Globals
*/
int jsm_driver_state = DRIVER_INITIALIZED;
spinlock_t jsm_board_head_lock = SPIN_LOCK_UNLOCKED;
LIST_HEAD(jsm_board_head);
static struct pci_device_id jsm_pci_tbl[] = {
{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
{ 0,} /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
static struct board_id jsm_Ids[] = {
{ PCI_DEVICE_NEO_2DB9_PCI_NAME, 2 },
{ PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2 },
{ PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2 },
{ PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2 },
{ NULL, 0 }
};
char *jsm_driver_state_text[] = {
"Driver Initialized",
"Driver Ready."
};
static int jsm_finalize_board_init(struct jsm_board *brd)
static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int rc = 0;
jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
if (brd->irq) {
rc = request_irq(brd->irq, brd->bd_ops->intr, SA_INTERRUPT|SA_SHIRQ, "JSM", brd);
if (rc) {
printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
brd->state = BOARD_FAILED;
brd->dpastatus = BD_NOFEP;
rc = -ENODEV;
} else
jsm_printk(INIT, INFO, &brd->pci_dev,
"Requested and received usage of IRQ %d\n", brd->irq);
}
return rc;
}
/*
* jsm_found_board()
*
* A board has been found, init it.
*/
static int jsm_found_board(struct pci_dev *pdev, int id)
{
struct jsm_board *brd;
int i = 0;
int rc = 0;
struct list_head *tmp;
struct jsm_board *cur_board_entry;
unsigned long lock_flags;
int adapter_count = 0;
static int adapter_count = 0;
int retval;
rc = pci_enable_device(pdev);
if (rc) {
dev_err(&pdev->dev, "Device enable FAILED\n");
goto out;
}
rc = pci_request_regions(pdev, "jsm");
if (rc) {
dev_err(&pdev->dev, "pci_request_region FAILED\n");
goto out_disable_device;
}
brd = kmalloc(sizeof(struct jsm_board), GFP_KERNEL);
if (!brd) {
dev_err(&pdev->dev, "memory allocation for board structure failed\n");
return -ENOMEM;
dev_err(&pdev->dev,
"memory allocation for board structure failed\n");
rc = -ENOMEM;
goto out_release_regions;
}
memset(brd, 0, sizeof(struct jsm_board));
spin_lock_irqsave(&jsm_board_head_lock, lock_flags);
list_for_each(tmp, &jsm_board_head) {
cur_board_entry =
list_entry(tmp, struct jsm_board,
jsm_board_entry);
if (cur_board_entry->boardnum != adapter_count) {
break;
}
adapter_count++;
}
list_add_tail(&brd->jsm_board_entry, &jsm_board_head);
spin_unlock_irqrestore(&jsm_board_head_lock, lock_flags);
/* store the info for the board we've found */
brd->boardnum = adapter_count;
brd->boardnum = adapter_count++;
brd->pci_dev = pdev;
brd->name = jsm_Ids[id].name;
brd->maxports = jsm_Ids[id].maxports;
brd->dpastatus = BD_NOFEP;
init_waitqueue_head(&brd->state_wait);
brd->maxports = 2;
spin_lock_init(&brd->bd_lock);
spin_lock_init(&brd->bd_intr_lock);
brd->state = BOARD_FOUND;
for (i = 0; i < brd->maxports; i++)
brd->channels[i] = NULL;
/* store which revision we have */
pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
brd->irq = pdev->irq;
switch(brd->pci_dev->device) {
jsm_printk(INIT, INFO, &brd->pci_dev,
"jsm_found_board - NEO adapter\n");
case PCI_DEVICE_ID_NEO_2DB9:
case PCI_DEVICE_ID_NEO_2DB9PRI:
case PCI_DEVICE_ID_NEO_2RJ45:
case PCI_DEVICE_ID_NEO_2RJ45PRI:
/* get the PCI Base Address Registers */
brd->membase = pci_resource_start(pdev, 0);
brd->membase_end = pci_resource_end(pdev, 0);
/*
* This chip is set up 100% when we get to it.
* No need to enable global interrupts or anything.
*/
brd->dpatype = T_NEO | T_PCIBUS;
if (brd->membase & 1)
brd->membase &= ~3;
else
brd->membase &= ~15;
jsm_printk(INIT, INFO, &brd->pci_dev,
"jsm_found_board - NEO adapter\n");
/* Assign the board_ops struct */
brd->bd_ops = &jsm_neo_ops;
/* get the PCI Base Address Registers */
brd->membase = pci_resource_start(pdev, 0);
brd->membase_end = pci_resource_end(pdev, 0);
brd->bd_uart_offset = 0x200;
brd->bd_dividend = 921600;
if (brd->membase & 1)
brd->membase &= ~3;
else
brd->membase &= ~15;
/* Assign the board_ops struct */
brd->bd_ops = &jsm_neo_ops;
brd->bd_uart_offset = 0x200;
brd->bd_dividend = 921600;
brd->re_map_membase = ioremap(brd->membase, 0x1000);
jsm_printk(INIT, INFO, &brd->pci_dev,
"remapped mem: 0x%p\n", brd->re_map_membase);
if (!brd->re_map_membase) {
kfree(brd);
dev_err(&pdev->dev, "card has no PCI Memory resources, failing board.\n");
return -ENOMEM;
}
break;
default:
dev_err(&pdev->dev, "Did not find any compatible Neo or Classic PCI boards in system.\n");
kfree(brd);
return -ENXIO;
brd->re_map_membase = ioremap(brd->membase, 0x1000);
if (!brd->re_map_membase) {
dev_err(&pdev->dev,
"card has no PCI Memory resources, "
"failing board.\n");
rc = -ENOMEM;
goto out_kfree_brd;
}
/*
* Do tty device initialization.
*/
rc = jsm_finalize_board_init(brd);
if (rc < 0) {
dev_err(&pdev->dev, "Can't finalize board init (%d)\n", rc);
brd->state = BOARD_FAILED;
retval = -ENXIO;
goto failed0;
rc = request_irq(brd->irq, brd->bd_ops->intr,
SA_INTERRUPT|SA_SHIRQ, "JSM", brd);
if (rc) {
printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
goto out_iounmap;
}
rc = jsm_tty_init(brd);
if (rc < 0) {
dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
brd->state = BOARD_FAILED;
retval = -ENXIO;
goto failed1;
goto out_free_irq;
}
rc = jsm_uart_port_init(brd);
if (rc < 0) {
/* XXX: leaking all resources from jsm_tty_init here! */
dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
brd->state = BOARD_FAILED;
retval = -ENXIO;
goto failed1;
goto out_free_irq;
}
brd->state = BOARD_READY;
brd->dpastatus = BD_RUNNING;
/* Log the information about the board */
dev_info(&pdev->dev, "board %d: %s (rev %d), irq %d\n",adapter_count, brd->name, brd->rev, brd->irq);
dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
adapter_count, brd->rev, brd->irq);
/*
* allocate flip buffer for board.
@ -249,156 +156,91 @@ static int jsm_found_board(struct pci_dev *pdev, int id)
*/
brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
if (!brd->flipbuf) {
/* XXX: leaking all resources from jsm_tty_init and
jsm_uart_port_init here! */
dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
brd->state = BOARD_FAILED;
retval = -ENOMEM;
goto failed1;
goto out_free_irq;
}
memset(brd->flipbuf, 0, MYFLIPLEN);
jsm_create_driver_sysfiles(pdev->dev.driver);
pci_set_drvdata(pdev, brd);
wake_up_interruptible(&brd->state_wait);
return 0;
failed1:
out_free_irq:
free_irq(brd->irq, brd);
failed0:
kfree(brd);
out_iounmap:
iounmap(brd->re_map_membase);
return retval;
}
/* returns count (>= 0), or negative on error */
static int jsm_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int rc;
rc = pci_enable_device(pdev);
if (rc) {
dev_err(&pdev->dev, "Device enable FAILED\n");
return rc;
}
if ((rc = pci_request_regions(pdev, "jsm"))) {
dev_err(&pdev->dev, "pci_request_region FAILED\n");
pci_disable_device(pdev);
return rc;
}
if ((rc = jsm_found_board(pdev, ent->driver_data))) {
dev_err(&pdev->dev, "jsm_found_board FAILED\n");
pci_release_regions(pdev);
pci_disable_device(pdev);
return rc;
}
out_kfree_brd:
kfree(brd);
out_release_regions:
pci_release_regions(pdev);
out_disable_device:
pci_disable_device(pdev);
out:
return rc;
}
/*
* jsm_cleanup_board()
*
* Free all the memory associated with a board
*/
static void jsm_cleanup_board(struct jsm_board *brd)
static void jsm_remove_one(struct pci_dev *pdev)
{
struct jsm_board *brd = pci_get_drvdata(pdev);
int i = 0;
jsm_remove_uart_port(brd);
free_irq(brd->irq, brd);
iounmap(brd->re_map_membase);
/* Free all allocated channels structs */
for (i = 0; i < brd->maxports; i++) {
if (brd->channels[i]) {
if (brd->channels[i]->ch_rqueue)
kfree(brd->channels[i]->ch_rqueue);
if (brd->channels[i]->ch_equeue)
kfree(brd->channels[i]->ch_equeue);
if (brd->channels[i]->ch_wqueue)
kfree(brd->channels[i]->ch_wqueue);
kfree(brd->channels[i]->ch_rqueue);
kfree(brd->channels[i]->ch_equeue);
kfree(brd->channels[i]->ch_wqueue);
kfree(brd->channels[i]);
}
}
pci_release_regions(brd->pci_dev);
pci_disable_device(brd->pci_dev);
pci_release_regions(pdev);
pci_disable_device(pdev);
kfree(brd->flipbuf);
kfree(brd);
}
static void jsm_remove_one(struct pci_dev *dev)
{
unsigned long lock_flags;
struct list_head *tmp;
struct jsm_board *brd;
static struct pci_device_id jsm_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
spin_lock_irqsave(&jsm_board_head_lock, lock_flags);
list_for_each(tmp, &jsm_board_head) {
brd = list_entry(tmp, struct jsm_board,
jsm_board_entry);
if ( brd != NULL && brd->pci_dev == dev) {
jsm_remove_uart_port(brd);
jsm_cleanup_board(brd);
list_del(&brd->jsm_board_entry);
break;
}
}
spin_unlock_irqrestore(&jsm_board_head_lock, lock_flags);
return;
}
struct pci_driver jsm_driver = {
static struct pci_driver jsm_driver = {
.name = "jsm",
.probe = jsm_init_one,
.id_table = jsm_pci_tbl,
.probe = jsm_probe_one,
.remove = __devexit_p(jsm_remove_one),
};
/*
* jsm_init_module()
*
* Module load. This is where it all starts.
*/
static int __init jsm_init_module(void)
{
int rc = 0;
printk(KERN_INFO "%s, Digi International Part Number %s\n",
JSM_VERSION, JSM_VERSION);
/*
* Initialize global stuff
*/
int rc;
rc = uart_register_driver(&jsm_uart_driver);
if (rc < 0) {
return rc;
if (!rc) {
rc = pci_register_driver(&jsm_driver);
if (rc)
uart_unregister_driver(&jsm_uart_driver);
}
rc = pci_register_driver(&jsm_driver);
if (rc < 0) {
uart_unregister_driver(&jsm_uart_driver);
return rc;
}
jsm_driver_state = DRIVER_READY;
return rc;
}
module_init(jsm_init_module);
/*
* jsm_exit_module()
*
* Module unload. This is where it all ends.
*/
static void __exit jsm_exit_module(void)
{
jsm_remove_driver_sysfiles(&jsm_driver.driver);
pci_unregister_driver(&jsm_driver);
uart_unregister_driver(&jsm_uart_driver);
}
module_init(jsm_init_module);
module_exit(jsm_exit_module);
MODULE_LICENSE("GPL");

24
drivers/serial/jsm/jsm_tty.c
View File

@ -1012,27 +1012,3 @@ int jsm_tty_write(struct uart_port *port)
return data_count;
}
static ssize_t jsm_driver_version_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", JSM_VERSION);
}
static DRIVER_ATTR(version, S_IRUSR, jsm_driver_version_show, NULL);
static ssize_t jsm_driver_state_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", jsm_driver_state_text[jsm_driver_state]);
}
static DRIVER_ATTR(state, S_IRUSR, jsm_driver_state_show, NULL);
void jsm_create_driver_sysfiles(struct device_driver *driverfs)
{
driver_create_file(driverfs, &driver_attr_version);
driver_create_file(driverfs, &driver_attr_state);
}
void jsm_remove_driver_sysfiles(struct device_driver *driverfs)
{
driver_remove_file(driverfs, &driver_attr_version);
driver_remove_file(driverfs, &driver_attr_state);
}