On Tue, 9 Feb 2016, Alexandre Rossi wrote:
> Hi,
>
> netconsole does not seem to work so early in the boot process this time.
>
> > As this is Linux 4.3 and not 4.4, I guess this is a different problem
> > though. Alexandre, where you able to capture the stack trace? I’d submit
> > a new bug report with this.
>
> Here is a photo. Please ping me if you need to test some debugging patches.
It looks like the problem occurs in blk_post_runtime_resume(). Since
there have been recent changes to this routine, it's hard to tell
whether you're using the most up-to-date code.
In particular, the first few lines of blk_post_runtime_resume() in
block/blk-core.c should look like this:
void blk_post_runtime_resume(struct request_queue *q, int err)
{
if (!q->dev)
return;
The test was introduced by commit 4fd41a8552af ("SCSI: Fix NULL pointer
dereference in runtime PM"), which was added to the mainline kernel
between 4.3 and 4.4. I don't know what the commit ID would be for a
.stable kernel.
Alan Stern
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