From c3543fb5fe4520f03dd4fef04fab7745eeca1c96 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Fri, 7 Nov 2014 13:22:32 +0100 Subject: [PATCH] esp-pci: fixup deadlock with linux 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 Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini --- hw/scsi/esp-pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/scsi/esp-pci.c b/hw/scsi/esp-pci.c index 82795e68b8..77b8647fca 100644 --- a/hw/scsi/esp-pci.c +++ b/hw/scsi/esp-pci.c @@ -268,6 +268,8 @@ static void esp_pci_dma_memory_rw(PCIESPState *pci, uint8_t *buf, int len, /* update status registers */ pci->dma_regs[DMA_WBC] -= 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)