From 87c3019d7b1acb7704a257d78c482112e9b0c227 Mon Sep 17 00:00:00 2001 From: Jon Burgess Date: Thu, 3 May 2007 12:23:44 -0300 Subject: V4L/DVB (5592): DMA: Correctly free resources on error, sync PCI streamed data I added saa7146_vmalloc_destroy_pgtable() which frees the resources allocated by saa7146_vmalloc_build_pgtable() and updated the callers in budget-core.c and av7110.c. I have also been through the updated functions and updated the error paths to ensure they free all allocated resources on error. I also realised that there are other callers to saa7146_pgtable_free() which did not have any sg DMA mapped so it seems wrong to add the pci_unmap_sg() into that function. Instead I created saa7146_vmalloc_destroy_pgtable() to do this. Also included in this patch are the previous fixes for pci_unmap_sg() and syncing the PCI streamed data to work with a SWIOTLB and match the requirements documented in DMA-API.txt. Signed-off-by: Jon Burgess Signed-off-by: Oliver Endriss Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/ttpci/av7110.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/media/dvb/ttpci/av7110.c') diff --git a/drivers/media/dvb/ttpci/av7110.c b/drivers/media/dvb/ttpci/av7110.c index 67becdd4db60..ef1108c0bf11 100644 --- a/drivers/media/dvb/ttpci/av7110.c +++ b/drivers/media/dvb/ttpci/av7110.c @@ -1246,6 +1246,9 @@ static void vpeirq(unsigned long data) if (!budget->feeding1 || (newdma == olddma)) return; + /* Ensure streamed PCI data is synced to CPU */ + pci_dma_sync_sg_for_cpu(budget->dev->pci, budget->pt.slist, budget->pt.nents, PCI_DMA_FROMDEVICE); + #if 0 /* track rps1 activity */ printk("vpeirq: %02x Event Counter 1 0x%04x\n", @@ -2679,8 +2682,8 @@ err_iobuf_vfree_6: err_pci_free_5: pci_free_consistent(pdev, 8192, av7110->debi_virt, av7110->debi_bus); err_saa71466_vfree_4: - if (!av7110->grabbing) - saa7146_pgtable_free(pdev, &av7110->pt); + if (av7110->grabbing) + saa7146_vfree_destroy_pgtable(pdev, av7110->grabbing, &av7110->pt); err_i2c_del_3: i2c_del_adapter(&av7110->i2c_adap); err_dvb_unregister_adapter_2: @@ -2710,7 +2713,7 @@ static int __devexit av7110_detach(struct saa7146_dev* saa) SAA7146_ISR_CLEAR(saa, MASK_10); msleep(50); tasklet_kill(&av7110->vpe_tasklet); - saa7146_pgtable_free(saa->pci, &av7110->pt); + saa7146_vfree_destroy_pgtable(saa->pci, av7110->grabbing, &av7110->pt); } av7110_exit_v4l(av7110); -- cgit v1.2.1