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pcmcia: do not break rsrc_nonstatic when handling anonymous cards 

Patch 1c6c9b1d9d caused a regression for rsrc_nonstatic: It relies
on pccard_validate_cis() to determine whether an iomem resource can
be used for PCMCIA cards. This override, however, lead invalid iomem
resources to be accepted -- and lead to a fake CIS being used instead
of the original CIS.

To fix this issue, move the override for anonymous cards to the one
place where it is needed -- when adding a PCMCIA device.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2015-06-14 21:52:46 +02:00
parent d19319affb
commit e8e68fd86d
2 changed files with 27 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/pcmcia/cistpl.c
View File

@ -1449,26 +1449,16 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
done:
/* invalidate CIS cache on failure */
if (!dev_ok || !ident_ok || !count) {
#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
/* Set up as an anonymous card. If we don't have anonymous
memory support then just error the card as there is no
point trying to second guess.
Note: some cards have just a device entry, it may be
worth extending support to cover these in future */
if (!dev_ok || !ident_ok) {
dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
pcmcia_replace_cis(s, "\xFF", 1);
count = 1;
ret = 0;
} else
#endif
{
mutex_lock(&s->ops_mutex);
destroy_cis_cache(s);
mutex_unlock(&s->ops_mutex);
mutex_lock(&s->ops_mutex);
destroy_cis_cache(s);
mutex_unlock(&s->ops_mutex);
/* We differentiate between dev_ok, ident_ok and count
failures to allow for an override for anonymous cards
in ds.c */
if (!dev_ok || !ident_ok)
ret = -EIO;
}
else
ret = -EFAULT;
}
if (info)

20
drivers/pcmcia/ds.c
View File

@ -633,8 +633,24 @@ static int pcmcia_card_add(struct pcmcia_socket *s)
ret = pccard_validate_cis(s, &no_chains);
if (ret || !no_chains) {
dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
return -ENODEV;
#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
/* Set up as an anonymous card. If we don't have anonymous
memory support then just error the card as there is no
point trying to second guess.
Note: some cards have just a device entry, it may be
worth extending support to cover these in future */
if (ret == -EIO) {
dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
pcmcia_replace_cis(s, "\xFF", 1);
no_chains = 1;
ret = 0;
} else
#endif
{
dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
return -ENODEV;
}
}
if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))