diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2016-05-10 13:40:54 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-05-14 13:27:10 +0530 |
| commit | 3b2bc8a732a8dc2a7c4407aea64127229eb8fdd1 (patch) | |
| tree | b7694740307b3e9e60eb4cede57c9ce7f6f38ae0 /drivers/dma | |
| parent | 4376455727dcf627f12c3d209410ac576c0e8f0e (diff) | |
| download | linux-3b2bc8a732a8dc2a7c4407aea64127229eb8fdd1.tar.bz2 | |
dmaengine: edma: Re-evaluate errors when ccerr is triggered w/o error event
When the ccerr handler is called but the error registers indicate no error
events we need to command eDMA to re-evaluate the errors. Otherwise we can
receive flood of error interrupts.
Reported-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/edma.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index ee3463e774f8..694c44e487ed 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -1518,8 +1518,17 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data) dev_vdbg(ecc->dev, "dma_ccerr_handler\n"); - if (!edma_error_pending(ecc)) + if (!edma_error_pending(ecc)) { + /* + * The registers indicate no pending error event but the irq + * handler has been called. + * Ask eDMA to re-evaluate the error registers. + */ + dev_err(ecc->dev, "%s: Error interrupt without error event!\n", + __func__); + edma_write(ecc, EDMA_EEVAL, 1); return IRQ_NONE; + } while (1) { /* Event missed register(s) */ |