Messages in this thread | | | Date | Thu, 19 Jul 2012 04:25:20 -0700 (PDT) | Subject | Re: [PATCH RESEND v7 2/2] mmc: card: Adding support for sanitize in eMMC 4.5 | From | merez@codeauro ... |
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On Wed, July 18, 2012 11:46 pm, Chris Ball wrote: > Hi Yaniv, > > On Thu, Jun 28 2012, Yaniv Gardi wrote: >> This feature delete the unmap memory region of the eMMC card, >> by writing to a specific register in the EXT_CSD >> unmap region is the memory region that were previously deleted >> (by erase, trim or discard operation) >> >> Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> > > Did you reply to Chuanxiao's review comments yet? He said: > > "So to implement your scenario, how about only add > mmc_blk_issue_sanitize_rq() for REQ_SANITIZE but not touch > mmc_blk_issue_secdiscard_rq()? With your changes in > mmc_blk_issue_secdiscard_rq(), eMMC4.5 device will be failed to operate > secure trim/erase for REQ_SECURE request." > > at: http://thread.gmane.org/gmane.linux.kernel.mmc/14822/focus=14880 > > Thanks, > > - Chris. > -- > Chris Ball <cjb@laptop.org> <http://printf.net/> > One Laptop Per Child >
Secure trim and secure erase were removed from eMMC4.5. Please refer to annex B at B.6 section in eMMC4.5 spec. Therefore, failure upon trying to do secure trim/erase is the expected behavior for eMMC4.5 devices.
Thanks, Maya -- Sent by consultant of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
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