From 694625c0b322905d6892fad873029f764cd4823f Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Mon, 9 Jul 2007 11:55:54 -0700 Subject: PCI: add pci_try_set_mwi As suggested by Andrew, add pci_try_set_mwi(), which does not require return-value checking. - add pci_try_set_mwi() without __must_check - make it return 0 on success, errno if the "try" failed or error - review callers Signed-off-by: Randy Dunlap Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- Documentation/pci.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'Documentation/pci.txt') diff --git a/Documentation/pci.txt b/Documentation/pci.txt index 7d3da30ff0b..7754f5aea4e 100644 --- a/Documentation/pci.txt +++ b/Documentation/pci.txt @@ -296,7 +296,10 @@ If the PCI device can use the PCI Memory-Write-Invalidate transaction, call pci_set_mwi(). This enables the PCI_COMMAND bit for Mem-Wr-Inval and also ensures that the cache line size register is set correctly. Check the return value of pci_set_mwi() as not all architectures -or chip-sets may support Memory-Write-Invalidate. +or chip-sets may support Memory-Write-Invalidate. Alternatively, +if Mem-Wr-Inval would be nice to have but is not required, call +pci_try_set_mwi() to have the system do its best effort at enabling +Mem-Wr-Inval. 3.2 Request MMIO/IOP resources -- cgit v1.2.3