On Tue, Apr 19, 2016 at 11:09:53AM -0600, Jason Gunthorpe wrote:
> On Tue, Apr 19, 2016 at 12:54:18PM +0300, Jarkko Sakkinen wrote:
> > Cc: stable@xxxxxxxxxxxxxxx
> > Fixes: 1bd047be37d9 ("tpm_crb: Use devm_ioremap_resource")
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
> > drivers/char/tpm/tpm_crb.c | 39 ++++++++++++++++++++++++++++-----------
> > 1 file changed, 28 insertions(+), 11 deletions(-)
>
> This looks OK
>
> Reviewed-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Thanks!
> > + if (cmd_pa != rsp_pa) {
> > + priv->rsp = crb_map_res(dev, priv, &io_res, rsp_pa, rsp_size);
> > + return PTR_ERR_OR_ZERO(priv->rsp);
> > + }
>
> I would use an else here, 'exit on success' is considered an
> anti-pattern.
> Eg:
>
> if (cmd_pa == rsp_pa) {
> /* According to the PTP specification, overlapping command and response
> * buffer sizes must be identical.
> */
> if (cmd_size != rsp_size) {
> dev_err(dev, FW_BUG "overlapping command and response buffer sizes are not identical");
> return -EINVAL;
> }
> priv->rsp = priv->cmd;
> }
> else {
> priv->rsp = crb_map_res(dev, priv, &io_res, rsp_pa, rsp_size);
> if (IS_ERR(priv->rsp))
> return PTR_ERR(priv->rsp);
> }
>
> return 0;
I have to (in order to do right things right):
1. Update the patch.
2. Smoke test with the machines that I have.
3. Send a new version for review (because of the revamped control flow).
It's not that I wouldn't be willing to do this. I just don't think
this matters enough to be worth of the trouble.
> Jason
/Jarkko
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