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| author | Mike Marciniszyn <mike.marciniszyn@qlogic.com> | 2012-01-12 21:29:59 -0500 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2012-01-27 10:03:38 -0800 |
| commit | b6bfefb0410dc49853bccd9673ead896d317c082 (patch) | |
| tree | 28f767fddce244d327386a71f256d6ba585a9cf5 /drivers/infiniband | |
| parent | 0f3696eb21ef39b7bb7ea7d0160e925904309281 (diff) | |
| download | linux-stable-b6bfefb0410dc49853bccd9673ead896d317c082.tar.gz linux-stable-b6bfefb0410dc49853bccd9673ead896d317c082.tar.bz2 linux-stable-b6bfefb0410dc49853bccd9673ead896d317c082.zip | |
IB/qib: Roll back PCIe tuning change
Commit 8d4548f2b ("IB/qib: Default some module parameters optimally")
introduced an issue with older root complexes. They cannot handle the
pcie_caps of 0x51 (MaxReadReq 4096, MaxPayload=256).
A typical diagnostic in this situation reported by syslog contains
the text:
[PCIe Poisoned TLP][Send DMA memory read]
Restore the module paramter default to zero with will avoid any
changes in the root complex.
Reviewed-by: Mark Debbage <mark.debbage@qlogic.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_pcie.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/qib/qib_pcie.c b/drivers/infiniband/hw/qib/qib_pcie.c index f695061d688e..0fde788e1100 100644 --- a/drivers/infiniband/hw/qib/qib_pcie.c +++ b/drivers/infiniband/hw/qib/qib_pcie.c @@ -560,7 +560,7 @@ static int qib_tune_pcie_coalesce(struct qib_devdata *dd) * BIOS may not set PCIe bus-utilization parameters for best performance. * Check and optionally adjust them to maximize our throughput. */ -static int qib_pcie_caps = 0x51; +static int qib_pcie_caps; module_param_named(pcie_caps, qib_pcie_caps, int, S_IRUGO); MODULE_PARM_DESC(pcie_caps, "Max PCIe tuning: Payload (0..3), ReadReq (4..7)"); |