coresight: tmc: Report DMA setup failures

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>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 2a02da3..647b6aa 100644 (file)
--- 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)