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authorMike Marciniszyn <mike.marciniszyn@intel.com>2014-02-12 11:54:15 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-22 12:41:29 -0800
commitf367fe03bc3458e211e6d9b6454e49c91d39d7be (patch)
treedd806e03bf061b7926c90b1467f603d9559f4cd2 /drivers/infiniband
parentfb6b644040b75ae321e23855ac1b9c060c98488f (diff)
downloadlinux-linaro-stable-f367fe03bc3458e211e6d9b6454e49c91d39d7be.tar.gz
IB/qib: Add missing serdes init sequence
commit 2f75e12c4457a9b3d042c0a0d748fa198dc2ffaf upstream. Research has shown that commit a77fcf895046 ("IB/qib: Use a single txselect module parameter for serdes tuning") missed a key serdes init sequence. This patch add that sequence. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/qib/qib_iba7322.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index bd8cb0f89ef1..14103ffb4839 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -2287,6 +2287,11 @@ static int qib_7322_bringup_serdes(struct qib_pportdata *ppd)
qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a);
qib_write_kreg(dd, kr_scratch, 0ULL);
+ /* ensure previous Tx parameters are not still forced */
+ qib_write_kreg_port(ppd, krp_tx_deemph_override,
+ SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
+ reset_tx_deemphasis_override));
+
if (qib_compat_ddr_negotiate) {
ppd->cpspec->ibdeltainprog = 1;
ppd->cpspec->ibsymsnap = read_7322_creg32_port(ppd,