From: Niels Dossche <dossche.niels(a)gmail.com>
[ Upstream commit 22cbc6c2681a0a4fe76150270426e763d52353a4 ]
The documentation of the function rvt_error_qp says both r_lock and
s_lock need to be held when calling that function.
It also asserts using lockdep that both of those locks are held.
rvt_error_qp is called form rvt_send_cq, which is called from
rvt_qp_complete_swqe, which is called from rvt_send_complete, which is
called from rvt_ruc_loopback in two places. Both of these places do not
hold r_lock. Fix this by acquiring a spin_lock of r_lock in both of
these places.
The r_lock acquiring cannot be added in rvt_qp_complete_swqe because
some of its other callers already have r_lock acquired.
Link: https://lore.kernel.org/r/20220228195144.71946-1-dossche.niels@gmail.com
Signed-off-by: Niels Dossche <dossche.niels(a)gmail.com>
Signed-off-by: Jason Gunthorpe <jgg(a)nvidia.com>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
drivers/infiniband/sw/rdmavt/qp.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c
index 8ef112f883a7..3acab569fbb9 100644
--- a/drivers/infiniband/sw/rdmavt/qp.c
+++ b/drivers/infiniband/sw/rdmavt/qp.c
@@ -2775,7 +2775,7 @@ void rvt_qp_iter(struct rvt_dev_info *rdi,
EXPORT_SYMBOL(rvt_qp_iter);
/*
- * This should be called with s_lock held.
+ * This should be called with s_lock and r_lock held.
*/
void rvt_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
enum ib_wc_status status)
@@ -3134,7 +3134,9 @@ void rvt_ruc_loopback(struct rvt_qp *sqp)
rvp->n_loop_pkts++;
flush_send:
sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
+ spin_lock(&sqp->r_lock);
rvt_send_complete(sqp, wqe, send_status);
+ spin_unlock(&sqp->r_lock);
if (local_ops) {
atomic_dec(&sqp->local_ops_pending);
local_ops = 0;
@@ -3188,7 +3190,9 @@ void rvt_ruc_loopback(struct rvt_qp *sqp)
spin_unlock_irqrestore(&qp->r_lock, flags);
serr_no_r_lock:
spin_lock_irqsave(&sqp->s_lock, flags);
+ spin_lock(&sqp->r_lock);
rvt_send_complete(sqp, wqe, send_status);
+ spin_unlock(&sqp->r_lock);
if (sqp->ibqp.qp_type == IB_QPT_RC) {
int lastwqe;
--
2.35.1
From: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay(a)intel.com>
[ Upstream commit 0a967f5bfd9134b89681cae58deb222e20840e76 ]
The VT-d spec requires (10.4.4 Global Command Register, TE
field) that:
Hardware implementations supporting DMA draining must drain
any in-flight DMA read/write requests queued within the
Root-Complex before completing the translation enable
command and reflecting the status of the command through
the TES field in the Global Status register.
Unfortunately, some integrated graphic devices fail to do
so after some kind of power state transition. As the
result, the system might stuck in iommu_disable_translati
on(), waiting for the completion of TE transition.
This adds RPLS to a quirk list for those devices and skips
TE disabling if the qurik hits.
Link: https://gitlab.freedesktop.org/drm/intel/-/issues/4898
Tested-by: Raviteja Goud Talla <ravitejax.goud.talla(a)intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi(a)intel.com>
Acked-by: Lu Baolu <baolu.lu(a)linux.intel.com>
Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay(a)intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi(a)intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi(a)intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220302043256.191529-1-tejas…
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
drivers/iommu/intel/iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 0ea47e17b379..ba9a63cac47c 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5031,7 +5031,7 @@ static void quirk_igfx_skip_te_disable(struct pci_dev *dev)
ver = (dev->device >> 8) & 0xff;
if (ver != 0x45 && ver != 0x46 && ver != 0x4c &&
ver != 0x4e && ver != 0x8a && ver != 0x98 &&
- ver != 0x9a)
+ ver != 0x9a && ver != 0xa7)
return;
if (risky_device(dev))
--
2.35.1