Messages in this thread | | | Date | Fri, 10 Apr 2009 18:39:55 +0200 | From | Pierre Ossman <> | Subject | Re: [PATCH 1/1] MMC: core/core.c: mmc_rescan detects card change in one run |
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On Tue, 31 Mar 2009 17:51:21 +0300 Jorg Schummer <ext-jorg.2.schummer@nokia.com> wrote:
> With this patch, mmc_rescan can detect the removal of an mmc card and > the insertion of (possibly another) card in the same run. This means > that a card change can be detected without having to call > mmc_detect_change multiple times. > > This change generalises the core such that it can be easily used by > hosts which provide a mechanism to detect only the presence of a card > reader cover, which has to be taken off in order to insert a card. Other > hosts ("card detect" or "MMC_CAP_NEEDS_POLL") each receive an event when > a card is removed and when a card is inserted, so it is sufficient for > them if mmc_rescan handles only one event at a time. "Cover detect" > hosts, however, only receive events about the cover status. This means > that between 2 subsequent events, both a card removal and a card > insertion can occur. In this case, the pre-patch version of mmc_rescan > would only detect the removal of the previous card but not the insertion > of the new card. > > Signed-off-by: Jorg Schummer <ext-jorg.2.schummer@nokia.com> > ---
Queued, thanks.
Rgds -- -- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org rdesktop, core developer http://www.rdesktop.org TigerVNC, core developer http://www.tigervnc.org
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