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pcmcia: cleanup pccard_validate_cis()

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Cleanup pccard_validate_cis() and make it return an error code on
all failures, not merely on some failures.

Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2010-01-02 12:58:10 +01:00
parent 904e377744
commit f131ddc4bd
1 changed files with 80 additions and 73 deletions
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39
drivers/pcmcia/cistpl.c
View file

@ -1577,16 +1577,19 @@ int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
EXPORT_SYMBOL(pccard_loop_tuple);
/*======================================================================
This tries to determine if a card has a sensible CIS. It returns
the number of tuples in the CIS, or 0 if the CIS looks bad. The
checks include making sure several critical tuples are present and
valid; seeing if the total number of tuples is reasonable; and
looking for tuples that use reserved codes.
======================================================================*/
/**
* pccard_validate_cis() - check whether card has a sensible CIS
* @s: the struct pcmcia_socket we are to check
* @info: returns the number of tuples in the (valid) CIS, or 0
*
* This tries to determine if a card has a sensible CIS. In @info, it
* returns the number of tuples in the CIS, or 0 if the CIS looks bad. The
* checks include making sure several critical tuples are present and
* valid; seeing if the total number of tuples is reasonable; and
* looking for tuples that use reserved codes.
*
* The function returns 0 on success.
*/
int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
{
tuple_t *tuple;
@ -1602,13 +1605,13 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
if (tuple == NULL) {
dev_printk(KERN_WARNING, &s->dev, "no memory to validate CIS\n");
dev_warn(&s->dev, "no memory to validate CIS\n");
return -ENOMEM;
}
p = kmalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL) {
kfree(tuple);
dev_printk(KERN_WARNING, &s->dev, "no memory to validate CIS\n");
dev_warn(&s->dev, "no memory to validate CIS\n");
return -ENOMEM;
}
@ -1622,8 +1625,8 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
/* First tuple should be DEVICE; we should really have either that
or a CFTABLE_ENTRY of some sort */
if ((tuple->TupleCode == CISTPL_DEVICE) ||
(pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p) == 0) ||
(pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p) == 0))
(!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p)) ||
(!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p)))
dev_ok++;
/* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
@ -1650,15 +1653,19 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
((!dev_ok || !ident_ok) && (count > 10)))
count = 0;
ret = 0;
done:
/* invalidate CIS cache on failure */
if (!dev_ok || !ident_ok || !count)
if (!dev_ok || !ident_ok || !count) {
destroy_cis_cache(s);
ret = -EIO;
}
if (info)
*info = count;
kfree(tuple);
kfree(p);
return 0;
return ret;
}
EXPORT_SYMBOL(pccard_validate_cis);