On 02/05/2014 06:39 AM, Christoph Hellwig wrote:
> -static struct scsi_host_cmd_pool *scsi_get_host_cmd_pool(gfp_t gfp_mask)
> +static struct scsi_host_cmd_pool *
> +scsi_find_host_cmd_pool(struct Scsi_Host *shost)
> {
> + if (shost->hostt->cmd_size)
> + return shost->hostt->cmd_pool;
> + if (shost->unchecked_isa_dma)
> + return &scsi_cmd_dma_pool;
> + return &scsi_cmd_pool;
> +}
> +
It seems there is a issue with using the cmd_size to indicate the driver
has its own cmd pool and also using that for scsi mq enabled drivers to
indicate that we want the LLD's struct allocated by blk/scsi mq.
If a driver sets cmd_size for only the scsi/blk mq purpose, this patch
wants the driver to also setup a cmd pool which I do not think is used
when doing scsi/blk mq.
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