From: Jongman Heo <jongman.heo@samsung.com>
To: linux-mmc@vger.kernel.org
Subject: Writing emmc write-protected area gives no error, though the protection is working
Date: Tue, 17 Apr 2012 03:35:12 +0000 (GMT) [thread overview]
Message-ID: <15237741.51731334633712478.JavaMail.weblogic@epv6ml06> (raw)
Hi all,
I've tested (temporary) write-protection feature of eMMC flash.
#1. set the temporary write-protection (using CMD28)
#2. write data to the write-protected area (using dd or similar)
-> gives no error at all.
#3. checking the area confirms that write-protection is working, data is not over-written.
In step #2, I expected some error return, but no. Obviously write-protection is working, but user can't see any visible output.
Shouldn't write(2) return some error for above case?
Jongman.
reply other threads:[~2012-04-17 3:35 UTC|newest]
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