[PATCH] nvmet: protect sqhd update by a lock

[Johannes Thumshirn]

To me it looks a bit awkward why you're only protecting the RMW part but not
the re-read below.

Could you please give some explanation why this is not needed?

Thanks,
	Johannes
-- 
Johannes Thumshirn                                          Storage
jthumshirn at suse.de                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850