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Re: [PATCH] tpm, tpm_crb: fix unaligned read of the command buffer address

From Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Newsgroups linux.kernel
Subject Re: [PATCH] tpm, tpm_crb: fix unaligned read of the command buffer address
Date 2015-09-14 19:40 +0200
Message-ID <q8FTs-4AL-31@gated-at.bofh.it> (permalink)
References <q8FA6-4ei-13@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, Sep 14, 2015 at 08:15:23PM +0300, Jarkko Sakkinen wrote:
> The command buffer address is necessarily not naturally aligned.
> The hardware drops the entire read on some platforms and fills the
> address with 1's. This patch fixes the issue by splitting the read
> into two 32 bit reads.

Is this necessary? The packed attribution means that unaligned members
are allowed and the compiler deals with it where necessary.

Jason
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Thread

[PATCH] tpm, tpm_crb: fix unaligned read of the command buffer address Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2015-09-14 19:20 +0200
  Re: [PATCH] tpm, tpm_crb: fix unaligned read of the command buffer  address Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2015-09-14 19:40 +0200
    Re: [PATCH] tpm, tpm_crb: fix unaligned read of the command buffer  address Jarkko Sakkinen <jarkko.sakkinen@intel.com> - 2015-09-15 12:20 +0200
      Re: [PATCH] tpm, tpm_crb: fix unaligned read of the command buffer  address Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2015-09-15 18:40 +0200
        Re: [PATCH] tpm, tpm_crb: fix unaligned read of the command buffer  address Jarkko Sakkinen <jarkko.sakkinen@intel.com> - 2015-09-15 18:50 +0200

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