From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RRKAm-00017e-Uz for barebox@lists.infradead.org; Fri, 18 Nov 2011 08:51:49 +0000 Date: Fri, 18 Nov 2011 09:51:28 +0100 From: Sascha Hauer Message-ID: <20111118085128.GX27267@pengutronix.de> References: <1321435467-19148-1-git-send-email-jbe@pengutronix.de> <1321435467-19148-9-git-send-email-jbe@pengutronix.de> <20111117161706.GN27267@pengutronix.de> <201111180926.05353.jbe@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <201111180926.05353.jbe@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 08/13] DISK: Add common partition handling for disk like media To: Juergen Beisert Cc: barebox@lists.infradead.org On Fri, Nov 18, 2011 at 09:26:05AM +0100, Juergen Beisert wrote: > Sascha Hauer wrote: > > On Wed, Nov 16, 2011 at 10:24:22AM +0100, Juergen Beisert wrote: > > > This covers disk like media like SD card, CF cards, regular hard disks > > > and also USB mass storage devices. Most common used partition table is > > > still of DOS type. This implementation is prepared to support more > > > partition types in the future. > > > > > > Signed-off-by: Juergen Beisert > > > --- > > > common/Kconfig | 18 ++++ > > > common/Makefile | 2 + > > > common/partitions.c | 229 > > > +++++++++++++++++++++++++++++++++++++++++++++++++++ include/disks.h | > > > 2 + > > > 4 files changed, 251 insertions(+), 0 deletions(-) > > > create mode 100644 common/partitions.c > > > > > > diff --git a/common/Kconfig b/common/Kconfig > > > index 8e96920..1318e7d 100644 > > > --- a/common/Kconfig > > > +++ b/common/Kconfig > > > @@ -406,6 +406,24 @@ config PARTITION > > > > + > > > > > +/** > > > + * Try to collect partition information on the given block device > > > + * @param blk Block device to examine > > > + * @return 0 most of the time, negative value else > > > + * > > > + * It is not a failure if no partition information is found > > > + */ > > > +int parse_partition_table(struct block_device *blk) > > > +{ > > > + int i; > > > + int rc = 0; > > > + > > > +#ifdef CONFIG_PARTITION_DISK_DOS > > > + if (pdesc.used_entries == 0) > > > + try_dos_partition(blk); > > > +#endif > > > + > > > + if (pdesc.used_entries != 0) { > > > > So every block device that comes in uses the same global variable. We > > should support multiple block devices. > > Arrgggh. So many tests and this one has slipped in. A memset to 0 at the end > of this function should do the job, shouldn't it? > > > Also it should be possible to unregister the partitions on a block > > device. > > You mean for the case someone removes an SD card or an USB memory stick? Who > would call such a function? The usb command rescans the USB bus and will unregister all devices which disappeared. I don't know if this actually works for USB sticks (it would mean that also the fs has to be unmounted), but at least it should work one day... Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox