Messages in this thread | | | Date | Wed, 1 Oct 2014 12:36:03 -0600 | From | Bjorn Helgaas <> | Subject | Re: [PATCH 0/3] Revert MSI msg API churn |
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On Wed, Oct 01, 2014 at 10:48:16AM -0600, Alex Williamson wrote: > The MSI message API has gone through some churn, that I think results > in an inconsistent interface. We now have this: > > void read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void write_msi_msg(unsigned int irq, struct msi_msg *msg); > > write_msi_msg() takes an irq arg, but read_msi_msg() takes an > msi_desc. Presumably write_msi_msg() was not converted because it > has a much larger user base, but this sort of inconsitency results > in a poor API.
Yeah, that isn't good, thanks for noticing.
I rebuilt the pci/msi branch and dropped the commits you mentioned. The ones that are left are these:
56b72b409579 PCI/MSI: Use __write_msi_msg() instead of write_msi_msg() 1e8f4cc82ede MSI/powerpc: Use __read_msi_msg() instead of read_msi_msg() 2b260085e466 PCI/MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg()
which I think are OK.
> This series reverts a selection of commits to return us to: > > void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); > void write_msi_msg(unsigned int irq, struct msi_msg *msg); > > I've left the removal of read_msi_msg() since it has no users, but > restored get_cached_msi_msg() since it has an imminent user. This > will also cleanup the upcoming merge conflicts in next. Thanks, > > Alex > > --- > > Alex Williamson (3): > Revert "PCI/MSI: Remove unused get_cached_msi_msg()" > Revert "PCI/MSI: Rename __get_cached_msi_msg() to get_cached_msi_msg()" > Revert "PCI/MSI: Rename __read_msi_msg() to read_msi_msg()" > > > arch/ia64/kernel/msi_ia64.c | 2 +- > arch/ia64/sn/kernel/msi_sn.c | 2 +- > arch/powerpc/platforms/pseries/msi.c | 2 +- > arch/x86/kernel/apic/io_apic.c | 2 +- > arch/x86/pci/xen.c | 2 +- > drivers/pci/msi.c | 11 +++++++++-- > include/linux/msi.h | 5 +++-- > 7 files changed, 17 insertions(+), 9 deletions(-)
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