ide-scsi: fix race in idescsi_transfer_pc()
Start DMA engine before sending content of packet command (otherwise it is possible that IRQ will happen before DMA engine is started). Cc: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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@ -494,13 +494,14 @@ static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
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/* Set the interrupt routine */
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/* Set the interrupt routine */
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ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
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ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
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/* Send the actual packet */
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hwif->output_data(drive, NULL, scsi->pc->c, 12);
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if (pc->flags & PC_FLAG_DMA_OK) {
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if (pc->flags & PC_FLAG_DMA_OK) {
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pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
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pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
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hwif->dma_ops->dma_start(drive);
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hwif->dma_ops->dma_start(drive);
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}
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}
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/* Send the actual packet */
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hwif->output_data(drive, NULL, scsi->pc->c, 12);
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return ide_started;
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return ide_started;
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}
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}
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