linux/arch/powerpc
Nathan Lynch b139f1fb0f [POWERPC] Remove gratuitous reads from pasemi pci config space methods
The pasemi pci configuration space write method reads the written
location immediately after the write is performed, presumably in order
to flush the write.  However, configuration space writes are not
allowed to be posted, making these reads gratuitous.  Furthermore,
this behavior potentially causes us to violate the PCI PM spec when
changing between e.g. D0 and D3 states, because a delay of up to 10ms
may be required before the OS accesses configuration space after the
write which initiates the transition.

Remove the unnecessary reads from pa_pxp_write_config.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-08-17 11:01:54 +10:00
..
boot [POWERPC] Fixes to allow use of Ebony's flash chips through physmap_of 2007-08-17 11:01:51 +10:00
configs [POWERPC] Fixes to allow use of Ebony's flash chips through physmap_of 2007-08-17 11:01:51 +10:00
kernel [POWERPC] null_pci_ops: Use named structure member initializers 2007-08-17 11:01:53 +10:00
lib Remove fs.h from mm.h 2007-07-29 17:09:29 -07:00
math-emu
mm [POWERPC] Clean out a bunch of duplicate includes 2007-08-17 11:01:51 +10:00
oprofile Remove fs.h from mm.h 2007-07-29 17:09:29 -07:00
platforms [POWERPC] Remove gratuitous reads from pasemi pci config space methods 2007-08-17 11:01:54 +10:00
sysdev [POWERPC] tsi108_direct_pci_ops: Use named structure member initializers 2007-08-17 11:01:54 +10:00
xmon
.gitignore
Kconfig
Kconfig.debug Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
Makefile