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esp-pci: fixup deadlock with linux

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A linux guest will be issuing messages:

[   32.124042] DC390: Deadlock in DataIn_0: DMA aborted unfinished: 000000 bytes remain!!
[   32.126348] DC390: DataIn_0: DMA State: 0

and the HBA will fail to work properly.
Reason is the emulation is not setting the 'DMA transfer done'
status correctly.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Hannes Reinecke 2014-11-07 13:22:32 +01:00 committed by Paolo Bonzini
parent 6e76d125f2
commit c3543fb5fe
1 changed files with 2 additions and 0 deletions
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2
hw/scsi/esp-pci.c
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@ -268,6 +268,8 @@ static void esp_pci_dma_memory_rw(PCIESPState *pci, uint8_t *buf, int len,
/* update status registers */ /* update status registers */
pci->dma_regs[DMA_WBC] -= len; pci->dma_regs[DMA_WBC] -= len;
pci->dma_regs[DMA_WAC] += len; pci->dma_regs[DMA_WAC] += len;
if (pci->dma_regs[DMA_WBC] == 0)
pci->dma_regs[DMA_STAT] |= DMA_STAT_DONE;
} }
static void esp_pci_dma_memory_read(void *opaque, uint8_t *buf, int len) static void esp_pci_dma_memory_read(void *opaque, uint8_t *buf, int len)