diff options
| author | Felipe Franciosi <felipe@paradoxo.org> | 2014-03-13 14:34:21 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-06 07:59:34 -0700 |
| commit | 039c42311d46cff77dac8eded00cedb1fdba1ea9 (patch) | |
| tree | 60c89b15050cb39ad31a1e6b0117832748b553a6 | |
| parent | ccbbc3ab78800068d1ecc6984e74db64f2165702 (diff) | |
mtip32xx: Unmap the DMA segments before completing the IO request
commit 368c89d7ac70f937c93cd6f3b65bcfdfb3ba794f upstream.
If the buffers are unmapped after completing a request, then stale data
might be in the request.
Signed-off-by: Felipe Franciosi <felipe@paradoxo.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 8b1a9ed63a28..23df324102a3 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -266,6 +266,12 @@ static void mtip_async_complete(struct mtip_port *port, "Command tag %d failed due to TFE\n", tag); } + /* Unmap the DMA scatter list entries */ + dma_unmap_sg(&dd->pdev->dev, + command->sg, + command->scatter_ents, + command->direction); + /* Upper layer callback */ if (likely(command->async_callback)) command->async_callback(command->async_data, cb_status); @@ -273,12 +279,6 @@ static void mtip_async_complete(struct mtip_port *port, command->async_callback = NULL; command->comp_func = NULL; - /* Unmap the DMA scatter list entries */ - dma_unmap_sg(&dd->pdev->dev, - command->sg, - command->scatter_ents, - command->direction); - /* Clear the allocated and active bits for the command */ atomic_set(&port->commands[tag].active, 0); release_slot(port, tag); @@ -709,6 +709,12 @@ static void mtip_timeout_function(unsigned long int data) */ writel(1 << bit, port->completed[group]); + /* Unmap the DMA scatter list entries */ + dma_unmap_sg(&port->dd->pdev->dev, + command->sg, + command->scatter_ents, + command->direction); + /* Call the async completion callback. */ if (likely(command->async_callback)) command->async_callback(command->async_data, @@ -716,12 +722,6 @@ static void mtip_timeout_function(unsigned long int data) command->async_callback = NULL; command->comp_func = NULL; - /* Unmap the DMA scatter list entries */ - dma_unmap_sg(&port->dd->pdev->dev, - command->sg, - command->scatter_ents, - command->direction); - /* * Clear the allocated bit and active tag for the * command. |