On 11/25/2016 12:45 PM, Sam Ravnborg wrote:
Hi Dan. On Fri, Nov 25, 2016 at 02:12:51PM +0300, Dan Carpenter wrote:There are several error paths where we should enable IRQs but we don't. Fixes: bb620c3d3925 ("sparc: Make sparc64 use scalable lib/iommu-common.c functions") Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>Please use a more descriptive subject such as: sparc64: restore irq in error paths in iommu--- Not tested. diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 06981cc7..274df7a 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -230,12 +230,16 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size, for (n = 0; n < npages; n++) { long err = iommu_batch_add(first_page + (n * PAGE_SIZE), mask); - if (unlikely(err < 0L)) + if (unlikely(err < 0L)) { + local_irq_restore(flags); goto iommu_map_fail; + } }Locate all cleanup after the iommu_map_fail label.
+1 -Tushar
As it is now the irq_restore is on the error site and the free() is at the error label. It is very confusing that half of the recovery is in one place and the other in another place. Sam
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