diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etb10.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 824be0c5f592..105782ea64c7 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -136,6 +136,11 @@ static void __etb_enable_hw(struct etb_drvdata *drvdata) static int etb_enable_hw(struct etb_drvdata *drvdata) { + int rc = coresight_claim_device(drvdata->base); + + if (rc) + return rc; + __etb_enable_hw(drvdata); return 0; } @@ -223,7 +228,7 @@ static int etb_enable(struct coresight_device *csdev, u32 mode, void *data) return 0; } -static void etb_disable_hw(struct etb_drvdata *drvdata) +static void __etb_disable_hw(struct etb_drvdata *drvdata) { u32 ffcr; @@ -313,6 +318,13 @@ static void etb_dump_hw(struct etb_drvdata *drvdata) CS_LOCK(drvdata->base); } +static void etb_disable_hw(struct etb_drvdata *drvdata) +{ + __etb_disable_hw(drvdata); + etb_dump_hw(drvdata); + coresight_disclaim_device(drvdata->base); +} + static void etb_disable(struct coresight_device *csdev) { struct etb_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); @@ -323,7 +335,6 @@ static void etb_disable(struct coresight_device *csdev) /* Disable the ETB only if it needs to */ if (drvdata->mode != CS_MODE_DISABLED) { etb_disable_hw(drvdata); - etb_dump_hw(drvdata); drvdata->mode = CS_MODE_DISABLED; } spin_unlock_irqrestore(&drvdata->spinlock, flags); @@ -402,7 +413,7 @@ static unsigned long etb_update_buffer(struct coresight_device *csdev, capacity = drvdata->buffer_depth * ETB_FRAME_SIZE_WORDS; - etb_disable_hw(drvdata); + __etb_disable_hw(drvdata); CS_UNLOCK(drvdata->base); /* unit is in words, not bytes */ @@ -510,7 +521,7 @@ static unsigned long etb_update_buffer(struct coresight_device *csdev, handle->head = (cur * PAGE_SIZE) + offset; to_read = buf->nr_pages << PAGE_SHIFT; } - etb_enable_hw(drvdata); + __etb_enable_hw(drvdata); CS_LOCK(drvdata->base); return to_read; @@ -534,9 +545,9 @@ static void etb_dump(struct etb_drvdata *drvdata) spin_lock_irqsave(&drvdata->spinlock, flags); if (drvdata->mode == CS_MODE_SYSFS) { - etb_disable_hw(drvdata); + __etb_disable_hw(drvdata); etb_dump_hw(drvdata); - etb_enable_hw(drvdata); + __etb_enable_hw(drvdata); } spin_unlock_irqrestore(&drvdata->spinlock, flags); |