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-rw-r--r--Documentation/DMA-API-HOWTO.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/DMA-API-HOWTO.txt b/Documentation/DMA-API-HOWTO.txt
index 93d90870791c..a38ddadd208e 100644
--- a/Documentation/DMA-API-HOWTO.txt
+++ b/Documentation/DMA-API-HOWTO.txt
@@ -745,6 +745,10 @@ and return NETDEV_TX_OK if the DMA mapping fails on the transmit hook
745(ndo_start_xmit). This means that the socket buffer is just dropped in 745(ndo_start_xmit). This means that the socket buffer is just dropped in
746the failure case. 746the failure case.
747 747
748SCSI drivers must return SCSI_MLQUEUE_HOST_BUSY if the DMA mapping
749fails in the queuecommand hook. This means that the SCSI subsystem
750passes the command to the driver again later.
751
748 Closing 752 Closing
749 753
750This document, and the API itself, would not be in its current 754This document, and the API itself, would not be in its current