Re: [PATCH] scsi: fas216: fix sense buffer initialization
From: Martin K. Petersen
Date: Thu Jan 18 2018 - 21:45:19 EST
Arnd,
> While testing with the ARM specific memset() macro removed, I ran
> into a compiler warning that shows an old bug:
>
> drivers/scsi/arm/fas216.c: In function 'fas216_rq_sns_done':
> drivers/scsi/arm/fas216.c:2014:40: error: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to provide an explicit length? [-Werror=sizeof-pointer-memaccess]
>
> It turns out that the definition of the scsi_cmd structure changed back
> in linux-2.6.25, so now we clear only four bytes (sizeof(pointer)) instead
> of 96 (SCSI_SENSE_BUFFERSIZE). I did not check whether we actually need
> to initialize the buffer here, but it's clear that if we do it, we
> should use the correct size.
Applied to 4.16/scsi-queue. Thanks!
--
Martin K. Petersen Oracle Linux Engineering