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[1/3] pci: Let pci_dma_rw() propagate MemTxResult

Message ID 20200904162620.657726-2-philmd@redhat.com
State Accepted
Commit b73299d04dc2d2196f86be129ddca0242831d413
Headers show
Series pci: Let PCI DMA API functions propagate a MemTxResult | expand

Commit Message

Philippe Mathieu-Daudé Sept. 4, 2020, 4:26 p.m. UTC 
dma_memory_rw() returns a MemTxResult type.
Do not discard it, return it to the caller.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 include/hw/pci/pci.h | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index a221dfb3b08..a85b0bc3c44 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -785,8 +785,22 @@  static inline AddressSpace *pci_get_address_space(PCIDevice *dev)
     return &dev->bus_master_as;
 }
 
-static inline int pci_dma_rw(PCIDevice *dev, dma_addr_t addr,
-                             void *buf, dma_addr_t len, DMADirection dir)
+/**
+ * pci_dma_rw: Read from or write to an address space from PCI device.
+ *
+ * Return a MemTxResult indicating whether the operation succeeded
+ * or failed (eg unassigned memory, device rejected the transaction,
+ * IOMMU fault).
+ *
+ * @dev: #PCIDevice doing the memory access
+ * @addr: address within the #PCIDevice address space
+ * @buf: buffer with the data transferred
+ * @len: the number of bytes to read or write
+ * @dir: indicates the transfer direction
+ */
+static inline MemTxResult pci_dma_rw(PCIDevice *dev, dma_addr_t addr,
+                                     void *buf, dma_addr_t len,
+                                     DMADirection dir)
 {
     return dma_memory_rw(pci_get_address_space(dev), addr, buf, len,
                          dir, MEMTXATTRS_UNSPECIFIED);