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pci: Let pci_dma_read() propagate MemTxResult

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pci_dma_rw() returns a MemTxResult type.
Do not discard it, return it to the caller.

Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20201023151923.3243652-10-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-10-23 17:19:22 +02:00 committed by Paolo Bonzini
parent b73299d04d
commit c27f498237
1 changed files with 14 additions and 2 deletions
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16
include/hw/pci/pci.h
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@ -801,8 +801,20 @@ static inline MemTxResult pci_dma_rw(PCIDevice *dev, dma_addr_t addr,
return dma_memory_rw(pci_get_address_space(dev), addr, buf, len, dir);
}
static inline int pci_dma_read(PCIDevice *dev, dma_addr_t addr,
void *buf, dma_addr_t len)
/**
* pci_dma_read: Read from 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). Called within RCU critical section.
*
* @dev: #PCIDevice doing the memory access
* @addr: address within the #PCIDevice address space
* @buf: buffer with the data transferred
* @len: length of the data transferred
*/
static inline MemTxResult pci_dma_read(PCIDevice *dev, dma_addr_t addr,
void *buf, dma_addr_t len)
{
return pci_dma_rw(dev, addr, buf, len, DMA_DIRECTION_TO_DEVICE);
}