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powerpc/85xx: mpc85xx ADS: remove pci exclude

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This code was reworked in commit,

905e75c46dba5f3061049277e4eb7110beedba43

This change removed the fsl_add_bridge() which originally was above
the addition of the pci_exclude_device function. I think the assumption was that
the pci_exclude_device would prevent changes to the bridge PCI config after
it's been added. It seems it wasn't fully tested on MPC85xx ADS because
if you move the fsl_add_bridge() the pci_exclude_device is set in the machine
description then you can never update the PCI Config since the exclude
prevents it. This disrupts things like DMA.

This issue was extensively debugged by David Beazley.

Cc: xe-kernel@external.cisco.com
Cc: dbeazley@cisco.com
Cc: dwalker@fifo99.com
Signed-off-by: Daniel Walker <danielwa@cisco.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Daniel Walker 2015-11-05 16:31:21 -08:00 committed by Scott Wood
parent 4e9de5e970
commit 433c858a61
1 changed files with 0 additions and 15 deletions
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15
arch/powerpc/platforms/85xx/mpc85xx_ads.c
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@ -36,17 +36,6 @@
#include "mpc85xx.h"
#ifdef CONFIG_PCI
static int mpc85xx_exclude_device(struct pci_controller *hose,
u_char bus, u_char devfn)
{
if (bus == 0 && PCI_SLOT(devfn) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
else
return PCIBIOS_SUCCESSFUL;
}
#endif /* CONFIG_PCI */
static void __init mpc85xx_ads_pic_init(void)
{
struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
@ -145,10 +134,6 @@ static void __init mpc85xx_ads_setup_arch(void)
init_ioports();
#endif
#ifdef CONFIG_PCI
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif
fsl_pci_assign_primary();
}