[PATCH 01/25] coresight: tmc: Report DMA setup failures

Suzuki K Poulose
2019-03-20T18:50:13Z

If we failed to setup the DMA mask for TMC-ETR, report the
error before failing the probe.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
drivers/hwtracing/coresight/coresight-tmc.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 2a02da3..647b6aa 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -340,6 +340,8 @@ static inline bool tmc_etr_can_use_sg(struct tmc_drvdata *drvdata)
static int tmc_etr_setup_caps(struct tmc_drvdata *drvdata,
u32 devid, void *dev_caps)
{
+ int rc;
+
u32 dma_mask = 0;

/* Set the unadvertised capabilities */
@@ -369,7 +371,10 @@ static int tmc_etr_setup_caps(struct tmc_drvdata *drvdata,
dma_mask = 40;
}

- return dma_set_mask_and_coherent(drvdata->dev, DMA_BIT_MASK(dma_mask));
+ rc = dma_set_mask_and_coherent(drvdata->dev, DMA_BIT_MASK(dma_mask));
+ if (rc)
+ dev_err(drvdata->dev, "Failed to setup DMA mask: %d\n", rc);
+ return rc;
}

static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
--
2.7.4