On Tue, Jun 10, 2014 at 10:02 PM, Martin K. Petersen
<martin.petersen@xxxxxxxxxx> wrote:
>>>>>> "Sagi" == Sagi Grimberg <sagig@xxxxxxxxxxxx> writes:
>
> +static inline unsigned scsi_prot_length(unsigned data_length,
> + unsigned sector_size)
> +{
> + switch (sector_size) {
> + case 512:
> + return (data_length >> 9) * 8;
> + case 1024:
> + return (data_length >> 10) * 8;
> + case 2048:
> + return (data_length >> 11) * 8;
> + case 4096:
> + return (data_length >> 12) * 8;
> + default:
> + return (data_length >> ilog2(sector_size)) * 8;
> + }
> +}
> +
> +static inline unsigned scsi_transfer_length(struct scsi_cmnd *cmd)
> +{
> + unsigned data_length;
> +
> + if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
> + data_length = scsi_in(cmd)->length;
> + if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL ||
> + scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT)
> + return data_length;
> + } else {
> + data_length = scsi_out(cmd)->length;
> + if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL ||
> + scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)
> + return data_length;
> + }
> +
> + /* Protection information exists on the wire */
> + return data_length + scsi_prot_length(data_length,
> + cmd->device->sector_size);
> +}
>
> Let's do this for 3.16:
Just to make sure, by 3.16 you also mean 3.15.y, right?
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