Re: [PATCH] storvsc: do not assume SG list is continuous when doing bounce buffers (for 4.1 stable only)

From: Martin K. Petersen
Date: Wed Aug 23 2017 - 11:22:46 EST



Christoph,

> Ok. If the stable maintainers are ok with your small fix
> I'm not going to complain too loudly. But I'm always worried about
> stable trees divering too much from mainline.

The seemingly innocuous transition from SG_GAPS to virt boundary has
caused several data corruption regressions in the distro kernels. So has
the corresponding conversion of storvsc.

As a result, getting the current upstream code into 4.1 would mean
backporting and testing a significant amount of both block layer and
driver code. I don't think it's worth the risk. This patch is simple and
the path of least resistance.

Acked-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

--
Martin K. Petersen Oracle Linux Engineering