[PATCH] dmaengine: edma: Check the memory allocation for the memcpy dma device

[Peter Ujfalusi]

If the allocation fails then disable the memcpy support.

Signed-off-by: Peter Ujfalusi <peter.ujfal...@ti.com>
---
 drivers/dma/edma.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 5b197473106b..519e69e81fca 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -1899,6 +1899,11 @@ static void edma_dma_init(struct edma_cc *ecc, bool 
legacy_mode)
 
        if (memcpy_channels) {
                m_ddev = devm_kzalloc(ecc->dev, sizeof(*m_ddev), GFP_KERNEL);
+               if (!m_ddev) {
+                       dev_warn(ecc->dev, "memcpy is disabled due to OoM\n");
+                       memcpy_channels = NULL;
+                       goto ch_setup;
+               }
                ecc->dma_memcpy = m_ddev;
 
                dma_cap_zero(m_ddev->cap_mask);
@@ -1926,6 +1931,7 @@ static void edma_dma_init(struct edma_cc *ecc, bool 
legacy_mode)
                dev_info(ecc->dev, "memcpy is disabled\n");
        }
 
+ch_setup:
        for (i = 0; i < ecc->num_channels; i++) {
                struct edma_chan *echan = &ecc->slave_chans[i];
                echan->ch_num = EDMA_CTLR_CHAN(ecc->id, i);
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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