lkml.org 
[lkml]   [2018]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] dmaengine: edma: Check the memory allocation for the memcpy dma device
Date
If the allocation fails then disable the memcpy support.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@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.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

\
 
 \ /
  Last update: 2018-03-21 09:30    [W:0.042 / U:3.768 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site