ioremap balanced with iounmap for drivers/mtd subsystem

ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Tested (compilation only) with:
- allmodconfig
- Modifying drivers/mtd/maps/Kconfig and drivers/mtd/nand/Kconfig to
make sure that the changed file is compiling without warning

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Amol Lad 2006-09-21 18:12:43 +05:30 committed by David Woodhouse
parent dd8e9ed6ed
commit 25f0c659fe
15 changed files with 119 additions and 15 deletions

View file

@ -96,6 +96,8 @@ static struct mtd_partition arctic_partitions[PARTITIONS] = {
static int __init
init_arctic_mtd(void)
{
int err = 0;
printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);
arctic_mtd_map.virt = ioremap(PADDR, SIZE);
@ -109,12 +111,20 @@ init_arctic_mtd(void)
printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8);
arctic_mtd = do_map_probe("cfi_probe", &arctic_mtd_map);
if (!arctic_mtd)
if (!arctic_mtd) {
iounmap((void *) arctic_mtd_map.virt);
return -ENXIO;
}
arctic_mtd->owner = THIS_MODULE;
return add_mtd_partitions(arctic_mtd, arctic_partitions, PARTITIONS);
err = add_mtd_partitions(arctic_mtd, arctic_partitions, PARTITIONS);
if (err) {
printk("%s: add_mtd_partitions failed\n", NAME);
iounmap((void *) arctic_mtd_map.virt);
}
return err;
}
static void __exit

View file

@ -72,6 +72,8 @@ static struct mtd_partition beech_partitions[2] = {
static int __init
init_beech_mtd(void)
{
int err = 0;
printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);
beech_mtd_map.virt = ioremap(PADDR, SIZE);
@ -86,12 +88,20 @@ init_beech_mtd(void)
printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8);
beech_mtd = do_map_probe("cfi_probe", &beech_mtd_map);
if (!beech_mtd)
if (!beech_mtd) {
iounmap((void *) beech_mtd_map.virt);
return -ENXIO;
}
beech_mtd->owner = THIS_MODULE;
return add_mtd_partitions(beech_mtd, beech_partitions, 2);
err = add_mtd_partitions(beech_mtd, beech_partitions, 2);
if (err) {
printk("%s: add_mtd_partitions failed\n", NAME);
iounmap((void *) beech_mtd_map.virt);
}
return err;
}
static void __exit

View file

@ -171,7 +171,14 @@ int __init init_cstm_mips_ixx(void)
cstm_mips_ixx_map[i].phys = cstm_mips_ixx_board_desc[i].window_addr;
cstm_mips_ixx_map[i].virt = ioremap(cstm_mips_ixx_board_desc[i].window_addr, cstm_mips_ixx_board_desc[i].window_size);
if (!cstm_mips_ixx_map[i].virt) {
int j = 0;
printk(KERN_WARNING "Failed to ioremap\n");
for (j = 0; j < i; j++) {
if (cstm_mips_ixx_map[j].virt) {
iounmap((void *)cstm_mips_ixx_map[j].virt);
cstm_mips_ixx_map[j].virt = 0;
}
}
return -EIO;
}
cstm_mips_ixx_map[i].name = cstm_mips_ixx_board_desc[i].name;
@ -204,8 +211,15 @@ int __init init_cstm_mips_ixx(void)
cstm_mips_ixx_map[i].map_priv_2 = (unsigned long)mymtd;
add_mtd_partitions(mymtd, parts, cstm_mips_ixx_board_desc[i].num_partitions);
}
else
return -ENXIO;
else {
for (i = 0; i < PHYSMAP_NUMBER; i++) {
if (cstm_mips_ixx_map[i].virt) {
iounmap((void *)cstm_mips_ixx_map[i].virt);
cstm_mips_ixx_map[i].virt = 0;
}
}
return -ENXIO;
}
}
return 0;
}

View file

@ -108,6 +108,7 @@ int __init init_ebony(void)
ARRAY_SIZE(ebony_small_partitions));
} else {
printk("map probe failed for flash\n");
iounmap(ebony_small_map.virt);
return -ENXIO;
}
@ -117,6 +118,7 @@ int __init init_ebony(void)
if (!ebony_large_map.virt) {
printk("Failed to ioremap flash\n");
iounmap(ebony_small_map.virt);
return -EIO;
}
@ -129,6 +131,8 @@ int __init init_ebony(void)
ARRAY_SIZE(ebony_large_partitions));
} else {
printk("map probe failed for flash\n");
iounmap(ebony_small_map.virt);
iounmap(ebony_large_map.virt);
return -ENXIO;
}

View file

@ -218,8 +218,11 @@ int __init init_fortunet(void)
map_regions[ix].map_info.size);
if(!map_regions[ix].map_info.virt)
{
int j = 0;
printk(MTD_FORTUNET_PK "%s flash failed to ioremap!\n",
map_regions[ix].map_info.name);
for (j = 0 ; j < ix; j++)
iounmap(map_regions[j].map_info.virt);
return -ENXIO;
}
simple_map_init(&map_regions[ix].map_info);

View file

@ -79,6 +79,7 @@ static int __init init_lasat(void)
return 0;
}
iounmap(lasat_map.virt);
return -ENXIO;
}
@ -89,6 +90,7 @@ static void __exit cleanup_lasat(void)
map_destroy(lasat_mtd);
}
if (lasat_map.virt) {
iounmap(lasat_map.virt);
lasat_map.virt = 0;
}
}

View file

@ -277,6 +277,7 @@ int __init nettel_init(void)
nettel_amd_map.virt = ioremap_nocache(amdaddr, maxsize);
if (!nettel_amd_map.virt) {
printk("SNAPGEAR: failed to ioremap() BOOTCS\n");
iounmap(nettel_mmcrp);
return(-EIO);
}
simple_map_init(&nettel_amd_map);
@ -337,7 +338,8 @@ int __init nettel_init(void)
nettel_amd_map.virt = NULL;
#else
/* Only AMD flash supported */
return(-ENXIO);
rc = -ENXIO;
goto out_unmap2;
#endif
}
@ -361,14 +363,15 @@ int __init nettel_init(void)
nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize);
if (!nettel_intel_map.virt) {
printk("SNAPGEAR: failed to ioremap() ROMCS1\n");
return(-EIO);
rc = -EIO;
goto out_unmap2;
}
simple_map_init(&nettel_intel_map);
intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map);
if (!intel_mtd) {
iounmap(nettel_intel_map.virt);
return(-ENXIO);
rc = -ENXIO;
goto out_unmap1;
}
/* Set PAR to the detected size */
@ -394,13 +397,14 @@ int __init nettel_init(void)
nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize);
if (!nettel_intel_map.virt) {
printk("SNAPGEAR: failed to ioremap() ROMCS1/2\n");
return(-EIO);
rc = -EIO;
goto out_unmap2;
}
intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map);
if (! intel_mtd) {
iounmap((void *) nettel_intel_map.virt);
return(-ENXIO);
rc = -ENXIO;
goto out_unmap1;
}
intel1size = intel_mtd->size - intel0size;
@ -456,6 +460,18 @@ int __init nettel_init(void)
#endif
return(rc);
#ifdef CONFIG_MTD_CFI_INTELEXT
out_unmap1:
iounmap((void *) nettel_intel_map.virt);
#endif
out_unmap2:
iounmap(nettel_mmcrp);
iounmap(nettel_amd_map.virt);
return(rc);
}
/****************************************************************************/
@ -469,6 +485,10 @@ void __exit nettel_cleanup(void)
del_mtd_partitions(amd_mtd);
map_destroy(amd_mtd);
}
if (nettel_mmcrp) {
iounmap(nettel_mmcrp);
nettel_mmcrp = NULL;
}
if (nettel_amd_map.virt) {
iounmap(nettel_amd_map.virt);
nettel_amd_map.virt = NULL;

View file

@ -97,6 +97,7 @@ int __init init_ocotea(void)
ARRAY_SIZE(ocotea_small_partitions));
} else {
printk("map probe failed for flash\n");
iounmap(ocotea_small_map.virt);
return -ENXIO;
}
@ -106,6 +107,7 @@ int __init init_ocotea(void)
if (!ocotea_large_map.virt) {
printk("Failed to ioremap flash\n");
iounmap(ocotea_small_map.virt);
return -EIO;
}
@ -118,6 +120,8 @@ int __init init_ocotea(void)
ARRAY_SIZE(ocotea_large_partitions));
} else {
printk("map probe failed for flash\n");
iounmap(ocotea_small_map.virt);
iounmap(ocotea_large_map.virt);
return -ENXIO;
}

View file

@ -602,6 +602,10 @@ static int pcmciamtd_config(struct pcmcia_device *link)
ret = pcmcia_request_configuration(link, &link->conf);
if(ret != CS_SUCCESS) {
cs_error(link, RequestConfiguration, ret);
if (dev->win_base) {
iounmap(dev->win_base);
dev->win_base = NULL;
}
return -ENODEV;
}

View file

@ -126,6 +126,8 @@ static struct mtd_info *redwood_mtd;
int __init init_redwood_flash(void)
{
int err = 0;
printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
WINDOW_SIZE, WINDOW_ADDR);
@ -141,11 +143,18 @@ int __init init_redwood_flash(void)
if (redwood_mtd) {
redwood_mtd->owner = THIS_MODULE;
return add_mtd_partitions(redwood_mtd,
err = add_mtd_partitions(redwood_mtd,
redwood_flash_partitions,
NUM_REDWOOD_FLASH_PARTITIONS);
if (err) {
printk("init_redwood_flash: add_mtd_partitions failed\n");
iounmap(redwood_flash_map.virt);
}
return err;
}
iounmap(redwood_flash_map.virt);
return -ENXIO;
}

View file

@ -156,7 +156,7 @@ int __init init_sbc8240_mtd (void)
};
int devicesfound = 0;
int i;
int i,j;
for (i = 0; i < NUM_FLASH_BANKS; i++) {
printk (KERN_NOTICE MSG_PREFIX
@ -166,6 +166,10 @@ int __init init_sbc8240_mtd (void)
(unsigned long) ioremap (pt[i].addr, pt[i].size);
if (!sbc8240_map[i].map_priv_1) {
printk (MSG_PREFIX "failed to ioremap\n");
for (j = 0; j < i; j++) {
iounmap((void *) sbc8240_map[j].map_priv_1);
sbc8240_map[j].map_priv_1 = 0;
}
return -EIO;
}
simple_map_init(&sbc8240_mtd[i]);
@ -175,6 +179,11 @@ int __init init_sbc8240_mtd (void)
if (sbc8240_mtd[i]) {
sbc8240_mtd[i]->module = THIS_MODULE;
devicesfound++;
} else {
if (sbc8240_map[i].map_priv_1) {
iounmap((void *) sbc8240_map[i].map_priv_1);
sbc8240_map[i].map_priv_1 = 0;
}
}
}

View file

@ -68,6 +68,7 @@ int __init init_walnut(void)
if (WALNUT_FLASH_ONBD_N(fpga_brds1)) {
printk("The on-board flash is disabled (U79 sw 5)!");
iounmap(fpga_status_adr);
return -EIO;
}
if (WALNUT_FLASH_SRAM_SEL(fpga_brds1))
@ -81,6 +82,7 @@ int __init init_walnut(void)
if (!walnut_map.virt) {
printk("Failed to ioremap flash.\n");
iounmap(fpga_status_adr);
return -EIO;
}
@ -93,9 +95,11 @@ int __init init_walnut(void)
ARRAY_SIZE(walnut_partitions));
} else {
printk("map probe failed for flash\n");
iounmap(fpga_status_adr);
return -ENXIO;
}
iounmap(fpga_status_adr);
return 0;
}

View file

@ -198,6 +198,9 @@ static void __exit ep7312_cleanup(void)
/* Release resources, unregister device */
nand_release(ap7312_mtd);
/* Release io resource */
iounmap((void *)this->IO_ADDR_R);
/* Free the MTD device structure */
kfree(ep7312_mtd);
}

View file

@ -276,6 +276,7 @@ static int __init ppchameleonevb_init(void)
/* Scan to find existence of the device (it could not be mounted) */
if (nand_scan(ppchameleon_mtd, 1)) {
iounmap((void *)ppchameleon_fio_base);
ppchameleon_fio_base = NULL;
kfree(ppchameleon_mtd);
goto nand_evb_init;
}
@ -314,6 +315,8 @@ static int __init ppchameleonevb_init(void)
ppchameleonevb_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
if (!ppchameleonevb_mtd) {
printk("Unable to allocate PPChameleonEVB NAND MTD device structure.\n");
if (ppchameleon_fio_base)
iounmap(ppchameleon_fio_base);
return -ENOMEM;
}
@ -322,6 +325,8 @@ static int __init ppchameleonevb_init(void)
if (!ppchameleonevb_fio_base) {
printk("ioremap PPChameleonEVB NAND flash failed\n");
kfree(ppchameleonevb_mtd);
if (ppchameleon_fio_base)
iounmap(ppchameleon_fio_base);
return -EIO;
}
@ -378,6 +383,8 @@ static int __init ppchameleonevb_init(void)
if (nand_scan(ppchameleonevb_mtd, 1)) {
iounmap((void *)ppchameleonevb_fio_base);
kfree(ppchameleonevb_mtd);
if (ppchameleon_fio_base)
iounmap(ppchameleon_fio_base);
return -ENXIO;
}
#ifdef CONFIG_MTD_PARTITIONS

View file

@ -0,0 +1 @@
#define UTS_RELEASE "2.6.18"