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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-09-11 04:34:46 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-09-11 04:34:46 -0300
commit863981e96738983919de841ec669e157e6bdaeb0 (patch)
treed6d89a12e7eb8017837c057935a2271290907f76 /drivers/dma/ioat/init.c
parent8dec7c70575785729a6a9e6719a955e9c545bcab (diff)
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'drivers/dma/ioat/init.c')
-rw-r--r--drivers/dma/ioat/init.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index efdee1a69..d406056e8 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -690,12 +690,11 @@ static int ioat_alloc_chan_resources(struct dma_chan *c)
/* allocate a completion writeback area */
/* doing 2 32bit writes to mmio since 1 64b write doesn't work */
ioat_chan->completion =
- dma_pool_alloc(ioat_chan->ioat_dma->completion_pool,
- GFP_KERNEL, &ioat_chan->completion_dma);
+ dma_pool_zalloc(ioat_chan->ioat_dma->completion_pool,
+ GFP_KERNEL, &ioat_chan->completion_dma);
if (!ioat_chan->completion)
return -ENOMEM;
- memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion));
writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF,
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
writel(((u64)ioat_chan->completion_dma) >> 32,
@@ -1074,6 +1073,7 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
struct ioatdma_chan *ioat_chan;
bool is_raid_device = false;
int err;
+ u16 val16;
dma = &ioat_dma->dma_dev;
dma->device_prep_dma_memcpy = ioat_dma_prep_memcpy_lock;
@@ -1173,6 +1173,17 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
if (dca)
ioat_dma->dca = ioat_dca_init(pdev, ioat_dma->reg_base);
+ /* disable relaxed ordering */
+ err = pcie_capability_read_word(pdev, IOAT_DEVCTRL_OFFSET, &val16);
+ if (err)
+ return err;
+
+ /* clear relaxed ordering enable */
+ val16 &= ~IOAT_DEVCTRL_ROE;
+ err = pcie_capability_write_word(pdev, IOAT_DEVCTRL_OFFSET, val16);
+ if (err)
+ return err;
+
return 0;
}