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| author | Alexander Sverdlin <alexander.sverdlin@nokia.com> | 2015-03-18 14:05:21 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-10 15:41:42 +0200 |
| commit | 73bf3c2a500b2db8ac966469591196bf55afb409 (patch) | |
| tree | 1ca3d97a0cf83fce6287ce201af6acdb2ee60e3f /arch/mips/include/asm/octeon/pci-octeon.h | |
| parent | 4d46a67a3eb827ccf1125959936fd51ba318dabc (diff) | |
| download | linux-73bf3c2a500b2db8ac966469591196bf55afb409.tar.gz linux-73bf3c2a500b2db8ac966469591196bf55afb409.tar.bz2 linux-73bf3c2a500b2db8ac966469591196bf55afb409.zip | |
MIPS: Octeon: Remove udelay() causing huge IRQ latency
udelay() in PCI/PCIe read/write callbacks cause 30ms IRQ latency on Octeon
platforms because these operations are called from PCI_OP_READ() and
PCI_OP_WRITE() under raw_spin_lock_irqsave().
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: linux-mips@linux-mips.org
Cc: David Daney <ddaney@cavium.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Masanari Iida <standby24x7@gmail.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Mathias <mathias.rulf@nokia.com>
Patchwork: https://patchwork.linux-mips.org/patch/9576/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/octeon/pci-octeon.h')
| -rw-r--r-- | arch/mips/include/asm/octeon/pci-octeon.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/mips/include/asm/octeon/pci-octeon.h b/arch/mips/include/asm/octeon/pci-octeon.h index 64ba56a02843..1884609741a8 100644 --- a/arch/mips/include/asm/octeon/pci-octeon.h +++ b/arch/mips/include/asm/octeon/pci-octeon.h @@ -11,9 +11,6 @@ #include <linux/pci.h> -/* Some PCI cards require delays when accessing config space. */ -#define PCI_CONFIG_SPACE_DELAY 10000 - /* * The physical memory base mapped by BAR1. 256MB at the end of the * first 4GB. |