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-rw-r--r--drivers/net/wireless/intel/iwlwifi/pcie/internal.h2
-rw-r--r--drivers/net/wireless/intel/iwlwifi/pcie/rx.c10
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h
index 54af3daddd24..190f611af8ee 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h
@@ -68,12 +68,14 @@ struct iwl_host_cmd;
* struct iwl_rx_mem_buffer
* @page_dma: bus address of rxb page
* @page: driver's pointer to the rxb page
+ * @invalid: rxb is in driver ownership - not owned by HW
* @vid: index of this rxb in the global table
*/
struct iwl_rx_mem_buffer {
dma_addr_t page_dma;
struct page *page;
u16 vid;
+ bool invalid;
struct list_head list;
};
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
index 45f1b7e716a5..153b3084de0b 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
@@ -266,7 +266,7 @@ static void iwl_pcie_rxmq_restock(struct iwl_trans *trans,
rxb = list_first_entry(&rxq->rx_free, struct iwl_rx_mem_buffer,
list);
list_del(&rxb->list);
-
+ rxb->invalid = false;
/* 12 first bits are expected to be empty */
WARN_ON(rxb->page_dma & DMA_BIT_MASK(12));
/* Point to Rx buffer via next RBD in circular buffer */
@@ -317,6 +317,7 @@ static void iwl_pcie_rxsq_restock(struct iwl_trans *trans,
rxb = list_first_entry(&rxq->rx_free, struct iwl_rx_mem_buffer,
list);
list_del(&rxb->list);
+ rxb->invalid = false;
/* Point to Rx buffer via next RBD in circular buffer */
bd[rxq->write] = iwl_pcie_dma_addr2rbd_ptr(rxb->page_dma);
@@ -961,6 +962,7 @@ int iwl_pcie_rx_init(struct iwl_trans *trans)
list_add(&rxb->list, &def_rxq->rx_used);
trans_pcie->global_table[i] = rxb;
rxb->vid = (u16)(i + 1);
+ rxb->invalid = true;
}
iwl_pcie_rxq_alloc_rbs(trans, GFP_KERNEL, def_rxq);
@@ -1256,6 +1258,12 @@ restart:
goto out;
}
rxb = trans_pcie->global_table[vid - 1];
+ if (WARN(rxb->invalid,
+ "Invalid rxb from HW %u\n", (u32)vid)) {
+ iwl_force_nmi(trans);
+ goto out;
+ }
+ rxb->invalid = true;
} else {
rxb = rxq->queue[i];
rxq->queue[i] = NULL;
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