> - Tested on the PCI SDHCI on my laptop: requesting a new test > on i.MX from Benjamin. (Please!) Hey Linus, sorry to say that but in my case the kernel doesn't boot anymore. Again, after I "patched out" the bounce buffer it's running fine. Here is the kernel output.. sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman sdhci-pltfm: SDHCI platform and OF driver helper sdhci-esdhc-imx 53fb4000.esdhc: host only supports SDMA, activate bounce buffer sdhci-esdhc-imx 53fb4000.esdhc: bounce buffer: bounce up to 128 segments into one, max segment size 65536 bytes mmc0: SDHCI controller on 53fb4000.esdhc [53fb4000.esdhc] using DMA sdhci-esdhc-imx 53fb8000.esdhc: Got CD GPIO sdhci-esdhc-imx 53fb8000.esdhc: Got WP GPIO sdhci-esdhc-imx 53fb8000.esdhc: host only supports SDMA, activate bounce buffer sdhci-esdhc-imx 53fb8000.esdhc: bounce buffer: bounce up to 128 segments into one, max segment size 65536 bytes mmc1: SDHCI controller on 53fb8000.esdhc [53fb8000.esdhc] using DMA mmc0: new high speed MMC card at address 0001 oprofile: no performance counters oprofile: using timer interrupt. mmcblk0: mmc0:0001 002G00 1.83 GiB NET: Registered protocol family 10 mmcblk0boot0: mmc0:0001 002G00 partition 1 512 KiB mmcblk0boot1: mmc0:0001 002G00 partition 2 512 KiB Segment Routing with IPv6 sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver NET: Registered protocol family 17 can: controller area network core (rev 20170425 abi 9) NET: Registered protocol family 29 can: raw protocol (rev 20170425) can: broadcast manager protocol (rev 20170425 t) can: netlink gateway (rev 20170425) max_hops=1 input: gpio-keys as /devices/platform/gpio-keys/input/input1 mmcblk0rpmb: mmc0:0001 002G00 partition 3 128 KiB imxdi_rtc 53ffc000.dryice: setting system clock to 1970-01-03 01:46:38 UTC (179198) mmcblk0: p1 p2 p3 p4 < p5 p6 p7 p8 p9 p10 > EXT4-fs (mmcblk0p8): couldn't mount as ext3 due to feature incompatibilities EXT4-fs (mmcblk0p8): couldn't mount as ext2 due to feature incompatibilities EXT4-fs (mmcblk0p8): ext4_check_descriptors: Checksum for group 3 failed (1874!=0) EXT4-fs (mmcblk0p8): ext4_check_descriptors: Block bitmap for group 4 not in group (block 0)! EXT4-fs (mmcblk0p8): group descriptors corrupted! VFS: Cannot open root device "mmcblk0p8" or unknown-block(259,0): error -117 Please append a correct "root=" boot option; here are the available partitions: b300 1916928 mmcblk0 driver: mmcblk b301 767 mmcblk0p1 00000000-01 b302 128 mmcblk0p2 00000000-02 b303 128 mmcblk0p3 00000000-03 b304 1 mmcblk0p4 b305 767 mmcblk0p5 00000000-05 b306 409599 mmcblk0p6 00000000-06 b307 16383 mmcblk0p7 00000000-07 103:00000 409599 mmcblk0p8 00000000-08 103:00001 102399 mmcblk0p9 00000000-09 103:00002 961535 mmcblk0p10 00000000-0a b318 128 mmcblk0rpmb (driver?) b310 512 mmcblk0boot1 (driver?) b308 512 mmcblk0boot0 (driver?) Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(259,0) ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(259,0)