Commit e8e68fd8 authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

pcmcia: do not break rsrc_nonstatic when handling anonymous cards 



Patch 1c6c9b1d 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: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent d19319af

drivers/pcmcia/cistpl.c

+9 −19
Original line number Diff line number Diff line
@@ -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);

		/* 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)

drivers/pcmcia/ds.c

+18 −2
Original line number Diff line number Diff line
@@ -633,9 +633,25 @@ static int pcmcia_card_add(struct pcmcia_socket *s) 


	ret = pccard_validate_cis(s, &no_chains);

	if (ret || !no_chains) {

#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))

		no_funcs = mfc.nfn;

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