From: <gregkh@linuxfoundation.org>
To: robin.murphy@arm.com, alexander.levin@microsoft.com,
gregkh@linuxfoundation.org, mathieu.poirier@linaro.org,
suzuki.poulose@arm.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "coresight: tmc: Configure DMA mask appropriately" has been added to the 4.9-stable tree
Date: Mon, 09 Apr 2018 21:57:54 +0200 [thread overview]
Message-ID: <1523303874209252@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
coresight: tmc: Configure DMA mask appropriately
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
coresight-tmc-configure-dma-mask-appropriately.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Mon Apr 9 17:09:24 CEST 2018
From: Robin Murphy <robin.murphy@arm.com>
Date: Mon, 5 Jun 2017 14:15:09 -0600
Subject: coresight: tmc: Configure DMA mask appropriately
From: Robin Murphy <robin.murphy@arm.com>
[ Upstream commit a3959c50b02f57df4c4e4f14f632220f1c0b1f79 ]
Before making any DMA API calls, the ETR driver should really be setting
its masks to ensure that DMA is possible. Especially since it can
address more than the 32-bit default mask set by the AMBA bus code.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hwtracing/coresight/coresight-tmc.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -362,6 +362,13 @@ static int tmc_probe(struct amba_device
desc.type = CORESIGHT_DEV_TYPE_SINK;
desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
desc.ops = &tmc_etr_cs_ops;
+ /*
+ * ETR configuration uses a 40-bit AXI master in place of
+ * the embedded SRAM of ETB/ETF.
+ */
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+ if (ret)
+ goto out;
} else {
desc.type = CORESIGHT_DEV_TYPE_LINKSINK;
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO;
Patches currently in stable-queue which might be from robin.murphy@arm.com are
queue-4.9/coresight-tmc-configure-dma-mask-appropriately.patch
queue-4.9/arm64-futex-fix-undefined-behaviour-with-futex_op_oparg_shift-usage.patch
reply other threads:[~2018-04-09 19:59 UTC|newest]
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