Merge tag 'wireless-drivers-2020-01-23' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for v5.5

Second set of fixes for v5.5. There are quite a few patches,
especially on iwlwifi, due to me being on a long break. Libertas also
has a security fix and mt76 a build fix.

iwlwifi

* don't send the PPAG command when PPAG is disabled, since it can cause problems

* a few fixes for a HW bug

* a fix for RS offload;

* a fix for 3168 devices where the NVM tables where the wrong tables were being read

* fix a couple of potential memory leaks in TXQ code

* disable L0S states in all hardware since our hardware doesn't
 officially support them anymore (and older versions of the hardware
 had instability in these states)

* remove lar_disable parameter since it has been causing issues for
  some people who erroneously disable it

* force the debug monitor HW to stop also when debug is disabled,
  since it sometimes stays on and prevents low system power states

* don't send IWL_MVM_RXQ_NSSN_SYNC notification due to DMA problems

libertas

* fix two buffer overflows

mt76

* build fix related to CONFIG_MT76_LEDS

* fix off by one in bitrates handling
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 42 insertions, 3 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c
index d38cefbb779e..e249e3fd14c6 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c
@@ -57,6 +57,42 @@
 #include "internal.h"
 #include "iwl-prph.h"
 
+static void *_iwl_pcie_ctxt_info_dma_alloc_coherent(struct iwl_trans *trans,
+						    size_t size,
+						    dma_addr_t *phys,
+						    int depth)
+{
+	void *result;
+
+	if (WARN(depth > 2,
+		 "failed to allocate DMA memory not crossing 2^32 boundary"))
+		return NULL;
+
+	result = dma_alloc_coherent(trans->dev, size, phys, GFP_KERNEL);
+
+	if (!result)
+		return NULL;
+
+	if (unlikely(iwl_pcie_crosses_4g_boundary(*phys, size))) {
+		void *old = result;
+		dma_addr_t oldphys = *phys;
+
+		result = _iwl_pcie_ctxt_info_dma_alloc_coherent(trans, size,
+								phys,
+								depth + 1);
+		dma_free_coherent(trans->dev, size, old, oldphys);
+	}
+
+	return result;
+}
+
+static void *iwl_pcie_ctxt_info_dma_alloc_coherent(struct iwl_trans *trans,
+						   size_t size,
+						   dma_addr_t *phys)
+{
+	return _iwl_pcie_ctxt_info_dma_alloc_coherent(trans, size, phys, 0);
+}
+
 void iwl_pcie_ctxt_info_free_paging(struct iwl_trans *trans)
 {
 	struct iwl_self_init_dram *dram = &trans->init_dram;
@@ -161,14 +197,17 @@ int iwl_pcie_ctxt_info_init(struct iwl_trans *trans,
 	struct iwl_context_info *ctxt_info;
 	struct iwl_context_info_rbd_cfg *rx_cfg;
 	u32 control_flags = 0, rb_size;
+	dma_addr_t phys;
 	int ret;
 
-	ctxt_info = dma_alloc_coherent(trans->dev, sizeof(*ctxt_info),
-				       &trans_pcie->ctxt_info_dma_addr,
-				       GFP_KERNEL);
+	ctxt_info = iwl_pcie_ctxt_info_dma_alloc_coherent(trans,
+							  sizeof(*ctxt_info),
+							  &phys);
 	if (!ctxt_info)
 		return -ENOMEM;
 
+	trans_pcie->ctxt_info_dma_addr = phys;
+
 	ctxt_info->version.version = 0;
 	ctxt_info->version.mac_id =
 		cpu_to_le16((u16)iwl_read32(trans, CSR_HW_REV));