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PCI: conditional resource-reallocation through kernel parameter pci=realloc

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Multiple attempts to dynamically reallocate pci resources have
unfortunately lead to regressions. Though we continue to fix the
regressions and fine tune the dynamic-reallocation behavior, we have not
reached a acceptable state yet.
    
This patch provides a interim solution. It disables dynamic reallocation
by default, but adds the ability to enable it through pci=realloc kernel
command line parameter.
    
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Ram Pai
2011-07-07 11:19:10 -07:00
committed by Jesse Barnes
parent a2fa83faf4
commit f483d3923d
4 changed files with 21 additions and 0 deletions
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drivers/pci/pci.h
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@@ -146,6 +146,8 @@ static inline void pci_no_msi(void) { }
static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
#endif
extern void pci_realloc(void);
static inline int pci_no_d1d2(struct pci_dev *dev)
{
unsigned int parent_dstates = 0;