From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37245) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XowVq-0004SW-Bg for qemu-devel@nongnu.org; Thu, 13 Nov 2014 10:40:52 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XowVh-0007jQ-Ti for qemu-devel@nongnu.org; Thu, 13 Nov 2014 10:40:45 -0500 Sender: Paolo Bonzini From: Paolo Bonzini Date: Thu, 13 Nov 2014 16:40:16 +0100 Message-Id: <1415893228-25823-2-git-send-email-pbonzini@redhat.com> In-Reply-To: <1415893228-25823-1-git-send-email-pbonzini@redhat.com> References: <1415893228-25823-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 01/13] esp-pci: fixup deadlock with linux List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Hannes Reinecke , qemu-stable@nongnu.org From: Hannes Reinecke 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 82795e6..77b8647 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) -- 1.8.3.1