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/budget-core.c | 37 +++++++++++++++++++---------------- 1 file changed, 20 insertions(+), 17 deletions(-) (limited to 'drivers/media/dvb/ttpci/budget-core.c') diff --git a/drivers/media/dvb/ttpci/budget-core.c b/drivers/media/dvb/ttpci/budget-core.c index 6b97dc1e6b6..2557ac9620d 100644 --- a/drivers/media/dvb/ttpci/budget-core.c +++ b/drivers/media/dvb/ttpci/budget-core.c @@ -195,6 +195,9 @@ static void vpeirq(unsigned long data) u32 newdma = saa7146_read(budget->dev, PCI_VDP3); u32 count; + /* 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); + /* nearest lower position divisible by 188 */ newdma -= newdma % 188; @@ -504,16 +507,16 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev, strcpy(budget->i2c_adap.name, budget->card->name); if (i2c_add_adapter(&budget->i2c_adap) < 0) { - dvb_unregister_adapter(&budget->dvb_adapter); - return -ENOMEM; + ret = -ENOMEM; + goto err_dvb_unregister; } ttpci_eeprom_parse_mac(&budget->i2c_adap, budget->dvb_adapter.proposed_mac); - if (NULL == - (budget->grabbing = saa7146_vmalloc_build_pgtable(dev->pci, budget->buffer_size, &budget->pt))) { + budget->grabbing = saa7146_vmalloc_build_pgtable(dev->pci, budget->buffer_size, &budget->pt); + if (NULL == budget->grabbing) { ret = -ENOMEM; - goto err; + goto err_del_i2c; } saa7146_write(dev, PCI_BT_V1, 0x001c0000); @@ -526,14 +529,16 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev, if (bi->type != BUDGET_FS_ACTIVY) saa7146_setgpio(dev, 2, SAA7146_GPIO_OUTHI); - if (budget_register(budget) == 0) { - return 0; - } -err: - i2c_del_adapter(&budget->i2c_adap); + if (budget_register(budget) == 0) + return 0; /* Everything OK */ + + /* An error occurred, cleanup resources */ + saa7146_vfree_destroy_pgtable(dev->pci, budget->grabbing, &budget->pt); - vfree(budget->grabbing); +err_del_i2c: + i2c_del_adapter(&budget->i2c_adap); +err_dvb_unregister: dvb_unregister_adapter(&budget->dvb_adapter); return ret; @@ -555,15 +560,13 @@ int ttpci_budget_deinit(struct budget *budget) budget_unregister(budget); - i2c_del_adapter(&budget->i2c_adap); - - dvb_unregister_adapter(&budget->dvb_adapter); - tasklet_kill(&budget->vpe_tasklet); - saa7146_pgtable_free(dev->pci, &budget->pt); + saa7146_vfree_destroy_pgtable(dev->pci, budget->grabbing, &budget->pt); - vfree(budget->grabbing); + i2c_del_adapter(&budget->i2c_adap); + + dvb_unregister_adapter(&budget->dvb_adapter); return 0; } -- cgit v1.2.3