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ieee1394: stricter error checks in csr1212 

return -EINVAL becomes BUG_ON in checks of function call parameters.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2007-03-11 22:50:13 +01:00
parent 982610bd0d
commit 64ff712321
3 changed files with 34 additions and 51 deletions
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14
drivers/ieee1394/config_roms.c
View File

@ -63,9 +63,9 @@ int hpsb_default_host_entry(struct hpsb_host *host)
return -ENOMEM;
}
ret = csr1212_associate_keyval(vend_id, text);
csr1212_associate_keyval(vend_id, text);
csr1212_release_keyval(text);
ret |= csr1212_attach_keyval_to_directory(root, vend_id);
ret = csr1212_attach_keyval_to_directory(root, vend_id);
csr1212_release_keyval(vend_id);
if (ret != CSR1212_SUCCESS) {
csr1212_destroy_csr(host->csr.rom);
@ -103,10 +103,12 @@ static int config_rom_ip1394_init(void)
if (!ip1394_ud || !spec_id || !spec_desc || !ver || !ver_desc)
goto ip1394_fail;
if (csr1212_associate_keyval(spec_id, spec_desc) == CSR1212_SUCCESS &&
csr1212_associate_keyval(ver, ver_desc) == CSR1212_SUCCESS &&
csr1212_attach_keyval_to_directory(ip1394_ud, spec_id) == CSR1212_SUCCESS &&
csr1212_attach_keyval_to_directory(ip1394_ud, ver) == CSR1212_SUCCESS)
csr1212_associate_keyval(spec_id, spec_desc);
csr1212_associate_keyval(ver, ver_desc);
if (csr1212_attach_keyval_to_directory(ip1394_ud, spec_id)
== CSR1212_SUCCESS &&
csr1212_attach_keyval_to_directory(ip1394_ud, ver)
== CSR1212_SUCCESS)
ret = 0;
ip1394_fail:

67
drivers/ieee1394/csr1212.c
View File

@ -35,6 +35,7 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <asm/bug.h>
#include <asm/byteorder.h>
#include "csr1212.h"
@ -305,43 +306,29 @@ struct csr1212_keyval *csr1212_new_directory(u8 key)
return kv;
}
int csr1212_associate_keyval(struct csr1212_keyval *kv,
struct csr1212_keyval *associate)
void csr1212_associate_keyval(struct csr1212_keyval *kv,
struct csr1212_keyval *associate)
{
if (!kv || !associate)
return -EINVAL;
if (kv->key.id == CSR1212_KV_ID_DESCRIPTOR ||
(associate->key.id != CSR1212_KV_ID_DESCRIPTOR &&
associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO &&
associate->key.id != CSR1212_KV_ID_EXTENDED_KEY &&
associate->key.id != CSR1212_KV_ID_EXTENDED_DATA &&
associate->key.id < 0x30))
return -EINVAL;
if (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID &&
associate->key.id != CSR1212_KV_ID_EXTENDED_KEY)
return -EINVAL;
if (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
associate->key.id != CSR1212_KV_ID_EXTENDED_DATA)
return -EINVAL;
if (associate->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID)
return -EINVAL;
if (associate->key.id == CSR1212_KV_ID_EXTENDED_DATA &&
kv->key.id != CSR1212_KV_ID_EXTENDED_KEY)
return -EINVAL;
BUG_ON(!kv || !associate || kv->key.id == CSR1212_KV_ID_DESCRIPTOR ||
(associate->key.id != CSR1212_KV_ID_DESCRIPTOR &&
associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO &&
associate->key.id != CSR1212_KV_ID_EXTENDED_KEY &&
associate->key.id != CSR1212_KV_ID_EXTENDED_DATA &&
associate->key.id < 0x30) ||
(kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID &&
associate->key.id != CSR1212_KV_ID_EXTENDED_KEY) ||
(kv->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
associate->key.id != CSR1212_KV_ID_EXTENDED_DATA) ||
(associate->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) ||
(associate->key.id == CSR1212_KV_ID_EXTENDED_DATA &&
kv->key.id != CSR1212_KV_ID_EXTENDED_KEY));
if (kv->associate)
csr1212_release_keyval(kv->associate);
associate->refcnt++;
kv->associate = associate;
return CSR1212_SUCCESS;
}
int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
@ -349,8 +336,7 @@ int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
{
struct csr1212_dentry *dentry;
if (!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY)
return -EINVAL;
BUG_ON(!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY);
dentry = CSR1212_MALLOC(sizeof(*dentry));
if (!dentry)
@ -611,9 +597,8 @@ static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize)
struct csr1212_csr_rom_cache *cache;
u64 csr_addr;
if (!csr || !csr->ops || !csr->ops->allocate_addr_range ||
!csr->ops->release_addr || csr->max_rom < 1)
return -EINVAL;
BUG_ON(!csr || !csr->ops || !csr->ops->allocate_addr_range ||
!csr->ops->release_addr || csr->max_rom < 1);
/* ROM size must be a multiple of csr->max_rom */
romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1);
@ -950,8 +935,7 @@ int csr1212_generate_csr_image(struct csr1212_csr *csr)
int ret;
int init_offset;
if (!csr)
return -EINVAL;
BUG_ON(!csr);
cache = csr->cache_head;
@ -1011,8 +995,7 @@ int csr1212_generate_csr_image(struct csr1212_csr *csr)
/* Make sure the Extended ROM leaf is a multiple of
* max_rom in size. */
if (csr->max_rom < 1)
return -EINVAL;
BUG_ON(csr->max_rom < 1);
leaf_size = (cache->len + (csr->max_rom - 1)) &
~(csr->max_rom - 1);
@ -1278,8 +1261,7 @@ int _csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv)
u32 *cache_ptr;
u16 kv_len = 0;
if (!csr || !kv || csr->max_rom < 1)
return -EINVAL;
BUG_ON(!csr || !kv || csr->max_rom < 1);
/* First find which cache the data should be in (or go in if not read
* yet). */
@ -1436,8 +1418,7 @@ int csr1212_parse_csr(struct csr1212_csr *csr)
struct csr1212_dentry *dentry;
int ret;
if (!csr || !csr->ops || !csr->ops->bus_read)
return -EINVAL;
BUG_ON(!csr || !csr->ops || !csr->ops->bus_read);
ret = csr1212_parse_bus_info_block(csr);
if (ret != CSR1212_SUCCESS)

4
drivers/ieee1394/csr1212.h
View File

@ -283,8 +283,8 @@ extern struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s);
* Take care with subsequent ROM modifications: There is no function to remove
* previously specified associations.
*/
extern int csr1212_associate_keyval(struct csr1212_keyval *kv,
struct csr1212_keyval *associate);
extern void csr1212_associate_keyval(struct csr1212_keyval *kv,
struct csr1212_keyval *associate);
/* The following functions manage the association of a keyval and directories.