Re: [PATCH 1/2] scsi: add a max_segment_size limitation to struct Scsi_Host

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On 04/11/2016 03:47 PM, Christoph Hellwig wrote:
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 8106515..04c660d 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2120,7 +2120,8 @@ static void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
  	blk_queue_segment_boundary(q, shost->dma_boundary);
  	dma_set_seg_boundary(dev, shost->dma_boundary);

-	blk_queue_max_segment_size(q, dma_get_max_seg_size(dev));
+	blk_queue_max_segment_size(q,
+		min(shost->max_segment_size, dma_get_max_seg_size(dev)));

  	if (!shost->use_clustering)
  		q->limits.cluster = 0;

Hello Christoph,

Since Scsi_Host.max_segment_size is initialized to zero, shouldn't min() be changed into min_not_zero()?

Bart.
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