** Description changed: + SRU Justification + + [Impact] + + The Bionic Linux-raspi2 kernel has both the upstream and downstream pi + mmc modules enabled. Running the latest server image users can see this + error in dmesg: + + Error: Driver 'sdhost-bcm2835' is already registered, aborting... + + Due to this error the pi server image is failing a testcase on the iso + tracker. + + It is also not clear to users what mmc modules are in use. + + The attached patch removes the upstream mmc modules from the kernel + config. + + [Test Case] + + The bug can be reproduced by running the latest bionic 'classic' + raspberrypi server image - http://cdimage.ubuntu.com/ubuntu-server + /daily-preinstalled/current/bionic-preinstalled-server- + armhf+raspi2.img.xz + + Inspect the dmesg and observe the error. + + To check this is fixed, once the patched kernel has been installed, + reboot, inspect the dmesg again and the error should be gone. + + [Regression potential] + + This should be low. This config is the default used by raspbian and + recommended by the pi foundation, and is therefore well tested. + + The patch changes the mmc modules, so if things go wrong the pi may not + boot or the wifi on the pi3 may not work. + + I've built the kernel with the patch and everything still works. + + [Other Info] + + I think it is important to get this change in before the server images + are released. + + Note the pi3 wifi doesn't work out-of-the-box, there is a missing + brcmfmac43430-sdio.txt file. + + --- + + Original description: + Linux-raspi2 has both the upstream and downstream pi mmc modules enabled. In dmesg I get this error: Error: Driver 'sdhost-bcm2835' is already registered, aborting... I asked on the Raspberry Pi forums [1] about this and PhilE (Raspberry Pi engineer) answered: "For general guidance, in the Raspberry Pi kernels we use the bcm2835-sdhost driver for the SD card or EMMC interface and bcm2835-mmc for SDIO to the WiFi chip. Upstream uses bcm2835 for SD and sdhci-iproc for SDIO." I'm not entirely sure what the config used in raspbian is, but I think it is this: # # MMC/SD/SDIO Host Controller Drivers # CONFIG_MMC_BCM2835_MMC=y CONFIG_MMC_BCM2835_DMA=y CONFIG_MMC_BCM2835_PIO_DMA_BARRIER=2 CONFIG_MMC_BCM2835_SDHOST=y # CONFIG_MMC_DEBUG is not set # CONFIG_MMC_ARMMMCI is not set CONFIG_MMC_SDHCI=y CONFIG_MMC_SDHCI_PLTFM=y # CONFIG_MMC_SDHCI_OF_ARASAN is not set # CONFIG_MMC_SDHCI_OF_AT91 is not set # CONFIG_MMC_SDHCI_CADENCE is not set # CONFIG_MMC_SDHCI_F_SDH30 is not set # CONFIG_MMC_SDHCI_IPROC is not set CONFIG_MMC_SPI=m # CONFIG_MMC_DW is not set # CONFIG_MMC_VUB300 is not set # CONFIG_MMC_USHC is not set # CONFIG_MMC_USDHI6ROL0 is not set # CONFIG_MMC_BCM2835 is not set # CONFIG_MMC_MTK is not set # CONFIG_MMC_SDHCI_XENON is not set # CONFIG_MEMSTICK is not set CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y # CONFIG_LEDS_CLASS_FLASH is not set # CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set I'll run apport to collect the Ubuntu configs and dmesg logs etc. - [1] https://www.raspberrypi.org/forums/viewtopic.php?f=71&t=210225
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1762835 Title: Conflicting mmc modules built in To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1762835/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
