[BUG] 5.9-rc1 broken bootup on mt7622/mt7623

[Frank Wunderlich]

Hi

at least my Bananapi R2/R64 does not bootup (no output on serial console) with 5.9-rc1

made a bisect which points me to this commit:

commit f97dbf48ca43009e8b8bcdf07f47fc9f06149b36
Author: Saravana Kannan <saravanak@xxxxxxxxxx>
Date:   Fri Jul 17 17:06:36 2020 -0700

    irqchip/mtk-sysirq: Convert to a platform driver

    This driver can work as a platform driver. So covert it to a platform
    driver.

    Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
    Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
    Reviewed-by: Hanks Chen <hanks.chen@xxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20200718000637.3632841-4-saravanak@xxxxxxxxxx

 drivers/irqchip/irq-mtk-sysirq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

at least on my devices i got 5.9 working by reverting the commit, will send a revert-Patch

$ git bisect log
git bisect start
# bad: [d24b5abc4640b46bb356bb5371d244866a5fe0a3] gitignore: add from 5.8 + itb/mod
git bisect bad d24b5abc4640b46bb356bb5371d244866a5fe0a3
# good: [bcf876870b95592b52519ed4aafcf9d95999bc9c] Linux 5.8
git bisect good bcf876870b95592b52519ed4aafcf9d95999bc9c
# bad: [8186749621ed6b8fc42644c399e8c755a2b6f630] Merge tag 'drm-next-2020-08-06' of git://anongit.freedesktop.org/drm/drm
git bisect bad 8186749621ed6b8fc42644c399e8c755a2b6f630
# bad: [2324d50d051ec0f14a548e78554fb02513d6dcef] Merge tag 'docs-5.9' of git://git.lwn.net/linux
git bisect bad 2324d50d051ec0f14a548e78554fb02513d6dcef
# good: [92c59e126b21fd212195358a0d296e787e444087] Merge tag 'arm-defconfig-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
git bisect good 92c59e126b21fd212195358a0d296e787e444087
# good: [d4db4e553249eda9016fab2e363c26e52c47926f] Merge tag 'arm-newsoc-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
git bisect good d4db4e553249eda9016fab2e363c26e52c47926f
# good: [fd76a74d940ae3d6b8b2395cd12914630c7e1739] Merge tag 'audit-pr-20200803' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
git bisect good fd76a74d940ae3d6b8b2395cd12914630c7e1739
# bad: [95ffa676583b23baed40861d30b65fe31397da00] Merge branch 'parisc-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
git bisect bad 95ffa676583b23baed40861d30b65fe31397da00
# bad: [f8b036a7fc231fe6e8297daddee5dffdbbf2581f] Merge tag 'irq-core-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad f8b036a7fc231fe6e8297daddee5dffdbbf2581f
# good: [4f30a60aa78410496e5ffe632a371c00f0d83a8d] Merge tag 'close-range-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
git bisect good 4f30a60aa78410496e5ffe632a371c00f0d83a8d
# good: [8d16f5b979660c0fdcfa21a418cc03f1fde60cf7] genirq: Export irq_chip_retrigger_hierarchy and irq_chip_set_vcpu_affinity_parent
git bisect good 8d16f5b979660c0fdcfa21a418cc03f1fde60cf7
# bad: [c9c73a05413ea4a465cae1cb3593b01b190a233f] irqchip/loongson-liointc: Fix misuse of gc->mask_cache
git bisect bad c9c73a05413ea4a465cae1cb3593b01b190a233f
# bad: [f97dbf48ca43009e8b8bcdf07f47fc9f06149b36] irqchip/mtk-sysirq: Convert to a platform driver
git bisect bad f97dbf48ca43009e8b8bcdf07f47fc9f06149b36
# bad: [f97dbf48ca43009e8b8bcdf07f47fc9f06149b36] irqchip/mtk-sysirq: Convert to a platform driver
git bisect bad f97dbf48ca43009e8b8bcdf07f47fc9f06149b36 //needs change from 762a21fd45e0 as build-fix
# good: [3af9571cd585efafc2facbd8dbd407317ff898cf] irqchip/gic-v4.1: Ensure accessing the correct RD when writing INVALLR
git bisect good 3af9571cd585efafc2facbd8dbd407317ff898cf
# good: [f8410e626569324cfe831aaecc0504cafc12b471] irqchip: Add IRQCHIP_PLATFORM_DRIVER_BEGIN/END and IRQCHIP_MATCH helper macros
git bisect good f8410e626569324cfe831aaecc0504cafc12b471
# good: [5be57099d44550d2c4cf44a86c44df87edb79a57] irqchip/qcom-pdc: Switch to using IRQCHIP_PLATFORM_DRIVER helper macros
git bisect good 5be57099d44550d2c4cf44a86c44df87edb79a57
# first bad commit: [f97dbf48ca43009e8b8bcdf07f47fc9f06149b36] irqchip/mtk-sysirq: Convert to a platform driver

regards Frank