On 19 April 2017 at 15:06, Andreas Färber <afaer...@suse.de> wrote: > Am 19.04.2017 um 13:26 schrieb Heinrich Schuchardt: >> When iterating over the devices of an uclass the iteration stops >> at the first device that cannot be probed. >> When calling booefi this will result in no block device being > > "bootefi" > >> passed to the EFI executable if the first device cannot be probed. >> >> The problem was reported by Andreas Färber in >> https://lists.denx.de/pipermail/u-boot/2017-April/287432.html >> >> For testing I used an odroid-c2 with a dts including >> &sd_emmc_a { >> status = "okay"; >> } >> This device does not exist on the board and cannot be initialized. >> >> With the patch uclass_first_device and uclass_next_device >> iterate internally until they find the first device that can be >> probed or the end of the device list is reached. >> >> Debug output is provided for the two functions. >> >> Reported-by: Andreas Färber <afaer...@suse.de> >> Cc: Simon Glass <s...@chromium.org> >> Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de> >> --- >> v2: >> As suggested by Simon Glass correct uclass_first_device() and >> uclass_next_device() instead of uclass_get_device_tail() to >> avoid side effects. >> v1: >> The original patch was posted as >> core/uclass: uclass_get_device_tail: always set devp >> https://lists.denx.de/pipermail/u-boot/2017-April/288068.html >> --- >> drivers/core/uclass.c | 44 +++++++++++++++++++++++++++++++++----------- >> 1 file changed, 33 insertions(+), 11 deletions(-) > > Reviewed-by: Andreas Färber <afaer...@suse.de> > Tested-by: Andreas Färber <afaer...@suse.de> > > Confirming that on my Vega S95 Telos this results in a full GRUB menu, > and GRUB sees two disks. > > Many thanks, > > Andreas
Just to be clear, I am NAKing this patch. I do not want to change the existing semantics as it requires existing code to check the function return value. Instead I would like to: - Fix the bug found by Alvaro https://lists.denx.de/pipermail/u-boot/2017-April/288091.html This involves setting *devp to NULL when returning an error. - Add two new functions which return the device whether it probes or not, allowing iteration to continue. Since we have two potential users for these functions, it seems worth it. I'll take a look at this soon unless someone else does :-) Regards, SImon > > > ## Starting application at 0x01000000 ... > > > U-Boot 2017.05-rc2-00063-gfc365a8 (Apr 19 2017 - 22:48:23 +0200) vega-s95 > > DRAM: 2 GiB > MMC: mmc@70000: 0, mmc@72000: 1, mmc@74000: 2 > Using default environment > > In: serial@4c0 > Out: serial@4c0 > Err: serial@4c0 > Net: eth0: ethernet@c9410000 > Hit any key to stop autoboot: 0 > mmc_init: -95, time 1806 > MMC Device 0 not found > no mmc device at slot 0 > switch to partitions #0, OK > mmc1 is current device > Scanning mmc 1:1... > Setting boot device name to '//boot/dtb/amlogic/meson-gxbb-v' > 20335 bytes read in 44 ms (451.2 KiB/s) > Found EFI removable media binary efi/boot/bootaa64.efi > Setting boot device name to '/efi/boot/bootaa64.efi' > reading efi/boot/bootaa64.efi > 129024 bytes read in 12 ms (10.3 MiB/s) > ## Starting EFI application at 01080000 ... > mmc_init: -95, time 1806 > Scanning disk m...@72000.blk... > About to add disk device 'm...@72000.blk' > Adding disk device 'm...@72000.blk' > ** First descriptor is NOT a primary desc on 2:1 ** > Scanning disk m...@74000.blk... > About to add disk device 'm...@74000.blk' > Adding disk device 'm...@74000.blk' > Found 2 disks > Welcome to GRUB! > > [...] > > grub>ls > (hd0) (hd0,msdos2) (hd0,msdos1) (hd1) > > > -- > SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany > GF: Felix Imendörffer, Jane Smithard, Graham Norton > HRB 21284 (AG Nürnberg) _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
