[PATCH V2 08/15] staging: unisys: visorhba: use sg helper to operate sgl

Greg Kroah-Hartman gregkh at linuxfoundation.org
Thu Jun 13 10:16:56 UTC 2019

On Thu, Jun 13, 2019 at 06:04:11PM +0800, Ming Lei wrote:
> On Thu, Jun 13, 2019 at 11:52:14AM +0200, Greg Kroah-Hartman wrote:
> > On Thu, Jun 13, 2019 at 03:13:28PM +0800, Ming Lei wrote:
> > > The current way isn't safe for chained sgl, so use sg helper to
> > > operate sgl.
> > 
> > I can not make any sense out of this changelog.
> > 
> > What "isn't safe"?  What is a "sgl"?
> sgl is 'scatterlist' in kernel, and several linear sgl can be chained
> together, so accessing the sgl in linear way may see a chained sg, which
> is like a link pointer, then may cause trouble for driver.

What kind of "trouble"?  Is this a bug fix that needs to be backported
to stable kernels?  How can this be triggered?

> > Can this be applied "out of order"?
> Yes, there isn't any dependency among the 15 patches.

Then perhaps you shouldn't send a numbered patch series with different
patches sent to different maintainers, it just causes confusion :)


greg k-h

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