e9hack wrote:
> Oliver Endriss wrote:
> > Jon Burgess wrote:
> >> It appears the problem is that the driver is using streamed PCI and
> >> needs to explicitly sync the data otherwise it breaks when the SWIOTLB
> >> is in use. A call to pci_unmap_sg() was missing too.
> >>
> >> This patch is against the current v4l-dvb HG tree.
> >>
> >> I've only tested the change with a budget-ci card.
> >
> > Has anyone a problem with this patch?
> > If not I'll apply it tomorrow...
>
> If saa7146_pgtable_build_single() returns an error in
> saa7146_vmalloc_build_pgtable(), pci_free_consistent() should be
> also called.
Correct, and pci_unmap_sg(), kfree() and vfree() must also be called.
What about re-writing saa7146_vmalloc_build_pgtable():
char *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct
saa7146_pgtable *pt)
{
int pages = (length+PAGE_SIZE-1)/PAGE_SIZE;
char *mem = vmalloc_32(length);
int slen = 0;
if (NULL == mem)
return NULL;
if (!(pt->slist = vmalloc_to_sg(mem, pages)))
goto err_1;
if (saa7146_pgtable_alloc(pci, pt))
goto err_2;
slen = pci_map_sg(pci, pt->slist, pages, PCI_DMA_FROMDEVICE);
if (0 != saa7146_pgtable_build_single(pci, pt, pt->slist, slen))
goto err_3;
pt->nents = pages;
return mem;
err_3:
pci_free_consistent(pci, pt->size, pt->cpu, pt->dma);
pci_unmap_sg(pci, pt->slist, pages, PCI_DMA_FROMDEVICE);
pt->cpu = NULL;
err_2:
kfree(pt->slist);
pt->slist = NULL;
err_1:
vfree(mem);
return NULL;
}
Ok?
CU
Oliver
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