+ documentation-add-scsi-drivers-mapping-error-handling-to-dma-api-howto.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Documentation: add SCSI drivers' mapping error handling to DMA-API-HOWTO
has been added to the -mm tree.  Its filename is
     documentation-add-scsi-drivers-mapping-error-handling-to-dma-api-howto.patch

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------------------------------------------------------
Subject: Documentation: add SCSI drivers' mapping error handling to DMA-API-HOWTO
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

Add the concrete DMA mapping error handling for SCSI drivers on the
queuecommand path.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/DMA-API-HOWTO.txt |    4 ++++
 1 file changed, 4 insertions(+)

diff -puN Documentation/DMA-API-HOWTO.txt~documentation-add-scsi-drivers-mapping-error-handling-to-dma-api-howto Documentation/DMA-API-HOWTO.txt
--- a/Documentation/DMA-API-HOWTO.txt~documentation-add-scsi-drivers-mapping-error-handling-to-dma-api-howto
+++ a/Documentation/DMA-API-HOWTO.txt
@@ -745,6 +745,10 @@ and return NETDEV_TX_OK if the DMA mappi
 (ndo_start_xmit). This means that the socket buffer is just dropped in
 the failure case.
 
+SCSI drivers must return SCSI_MLQUEUE_HOST_BUSY if the DMA mapping
+fails in the queuecommand hook. This means that the SCSI subsystem
+passes the command to the driver again later.
+
 			   Closing
 
 This document, and the API itself, would not be in its current
_

Patches currently in -mm which might be from fujita.tomonori@lab.ntt.co.jp are

origin.patch
linux-next.patch
scsi-add-__init-__exit-macros-to-ibmvstgtc.patch
ia64-remove-unnecessary-sync_single_range_-in-swiotlb_dma_ops.patch
x86-remove-unnecessary-sync_single_range_-in-swiotlb_dma_ops.patch
powerpc-remove-unnecessary-sync_single_range_-in-swiotlb_dma_ops.patch
swiotlb-remove-unnecessary-swiotlb_sync_single_range_.patch
dma-mapping-remove-unnecessary-sync_single_range_-in-dma_map_ops.patch
documentation-add-networking-drivers-mapping-error-handling-to-dma-api-howto.patch
documentation-add-scsi-drivers-mapping-error-handling-to-dma-api-howto.patch
documentation-update-scatterlist-struct-description-in-dma-api-howto.patch
documentation-move-the-error-handling-to-the-better-place-in-dma-api-howto.patch
ssb-add-dma_dev-to-ssb_device-structure.patch
b43legacy-replace-the-ssb_dma-api-with-the-generic-dma-api.patch
b43-replace-the-ssb_dma-api-with-the-generic-dma-api.patch
b44-replace-the-ssb_dma-api-with-the-generic-dma-api.patch
ssb-remove-the-ssb-dma-api.patch
asm-generic-remove-isa_dma_threshold-in-scatterlisth.patch
asm-generic-add-need_sg_dma_length-to-define-sg_dma_len.patch
x86_32-use-asm-generic-scatterlisth.patch
powerpc-use-asm-generic-scatterlisth.patch
alpha-use-asm-generic-scatterlisth.patch
asm-generic-remove-arch_has_sg_chain-in-scatterlisth.patch
avr32-use-asm-generic-scatterlisth.patch
cris-use-asm-generic-scatterlisth.patch
h8300-use-asm-generic-scatterlisth.patch
m32r-use-use-asm-generic-scatterlisth.patch
m68k-use-asm-generic-scatterlisth.patch
mips-use-use-asm-generic-scatterlisth.patch
xtensa-use-use-asm-generic-scatterlisth.patch
blackfin-use-use-asm-generic-scatterlisth.patch
frv-use-asm-generic-scatterlisth.patch
mn10300-use-asm-generic-scatterlisth.patch
parisc-use-asm-generic-scatterlisth.patch