[oe-issues] [Bug 2474] New: linux-hotplug: mmc.agent shoud be block.agent

[bugzilla-daemon at tinman.treke.net]

http://bugs.openembedded.org/show_bug.cgi?id=2474

           Summary: linux-hotplug: mmc.agent shoud be block.agent
           Product: Openembedded
           Version: unspecified
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Distributions
        AssignedTo: openembedded-issues at lists.openembedded.org
        ReportedBy: u.luckas at road.de
         QAContact: tinderbox-oe at gmx.net


linux-hotplug comes with a mmc.agent which tries to mount MMC/SD card
partitions whenever a new card is inserted.

The script is racy and non deterministic. 

The mmc agent is called as soon, as a new card is detected. At that point, no
partitions are scanned and no devices created yet. The code already includes a
"sleep 4" as a workaround (which has been increased from "sleep 1" before).

Solutions:
If we did the mounting in block.agent instead of mmc.agent, we knew, that the
actual kernel device were already created - no waiting for it. 

We might still race with udev's device file creation, but this can be fixed in
udev by haveing /sbin/hotplug called from a udev rule and not directly through
the kernel interface.


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