From ee752da74f5d07cf441f8d42455c4241d6051ae5 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Fri, 10 Jun 2011 16:32:13 +0200 Subject: [PATCH] ide: Clear error_status after restarting flush Clearing the error status flag was missing for restarting flushes. Now that the error status is separate from the BM status register, we can simply set it to 0 after restarting the request. This ensures that we never forget to clear a bit. Signed-off-by: Kevin Wolf --- hw/ide/pci.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/hw/ide/pci.c b/hw/ide/pci.c index c940375064..9f3050a15e 100644 --- a/hw/ide/pci.c +++ b/hw/ide/pci.c @@ -189,6 +189,7 @@ static void bmdma_restart_bh(void *opaque) BMDMAState *bm = opaque; IDEBus *bus = bm->bus; int is_read; + int error_status; qemu_bh_delete(bm->bh); bm->bh = NULL; @@ -199,22 +200,25 @@ static void bmdma_restart_bh(void *opaque) is_read = !!(bus->error_status & BM_STATUS_RETRY_READ); - if (bus->error_status & BM_STATUS_DMA_RETRY) { - if (bus->error_status & BM_STATUS_RETRY_TRIM) { - bus->error_status &= ~BM_STATUS_RETRY_TRIM; + /* The error status must be cleared before resubmitting the request: The + * request may fail again, and this case can only be distinguished if the + * called function can set a new error status. */ + error_status = bus->error_status; + bus->error_status = 0; + + if (error_status & BM_STATUS_DMA_RETRY) { + if (error_status & BM_STATUS_RETRY_TRIM) { bmdma_restart_dma(bm, IDE_DMA_TRIM); } else { - bus->error_status &= ~(BM_STATUS_DMA_RETRY | BM_STATUS_RETRY_READ); bmdma_restart_dma(bm, is_read ? IDE_DMA_READ : IDE_DMA_WRITE); } - } else if (bus->error_status & BM_STATUS_PIO_RETRY) { - bus->error_status &= ~(BM_STATUS_PIO_RETRY | BM_STATUS_RETRY_READ); + } else if (error_status & BM_STATUS_PIO_RETRY) { if (is_read) { ide_sector_read(bmdma_active_if(bm)); } else { ide_sector_write(bmdma_active_if(bm)); } - } else if (bus->error_status & BM_STATUS_RETRY_FLUSH) { + } else if (error_status & BM_STATUS_RETRY_FLUSH) { ide_flush_cache(bmdma_active_if(bm)); } }