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Filename Latest commit message Latest commit date
Stanley Chu 48eafd42bd UPSTREAM: scsi: ufs: Fix possible infinite loop in ufshcd_hold 
In ufshcd_suspend(), after clk-gating is suspended and link is set
as Hibern8 state, ufshcd_hold() is still possibly invoked before
ufshcd_suspend() returns. For example, MediaTek's suspend vops may
issue UIC commands which would call ufshcd_hold() during the command
issuing flow.

Now if UFSHCD_CAP_HIBERN8_WITH_CLK_GATING capability is enabled,
then ufshcd_hold() may enter infinite loops because there is no
clk-ungating work scheduled or pending. In this case, ufshcd_hold()
shall just bypass, and keep the link as Hibern8 state.

Link: https://lore.kernel.org/r/20200809050734.18740-1-stanley.chu@mediatek.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Co-developed-by: Andy Teng <andy.teng@mediatek.com>
Signed-off-by: Andy Teng <andy.teng@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Bug: 166747994
(cherry picked from commit 93b6c5db06028a3b55122bbb74d0715dd8ca4ae0)
Change-Id: I595ee3f0da3b89e11cbe5d6d31ba7ce58b1757bc
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
2020-08-28 20:53:45 +00:00
android ANDROID: Update ABI 2020-08-28 12:28:07 -07:00
arch ANDROID: gki_defconfig: enable CONFIG_ARCH_SUNXI. 2020-08-27 17:11:22 +08:00
block This is the 5.4.59 stable release 2020-08-19 08:40:57 +02:00
certs
crypto Revert "ANDROID: Revert: Merge 5.4.60 into android11-5.4" 2020-08-23 13:12:51 +02:00
Documentation This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
drivers UPSTREAM: scsi: ufs: Fix possible infinite loop in ufshcd_hold 2020-08-28 20:53:45 +00:00
fs ANDROID: Incremental fs: fix magic compatibility again 2020-08-26 14:05:41 +00:00
include FROMLIST: clk: sunxi-ng: add support for the Allwinner A100 CCU 2020-08-27 17:11:05 +08:00
init ANDROID: net: enable wireless core features with GKI_LEGACY_WEXT_ALLCONFIG 2020-08-28 12:19:22 -07:00
ipc Revert "ANDROID: vfs: Add permission2 for filesystems with per mount permissions" 2020-05-29 14:48:37 +02:00
kernel This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
lib Revert "ANDROID: Revert: Merge 5.4.60 into android11-5.4" 2020-08-23 13:12:51 +02:00
LICENSES
mm This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
net This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
samples This is the 5.4.59 stable release 2020-08-19 08:40:57 +02:00
scripts This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
security This is the 5.4.59 stable release 2020-08-19 08:40:57 +02:00
sound This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
tools This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
usr initramfs: restore default compression behavior 2020-04-08 09:08:38 +02:00
virt KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not set 2020-08-26 10:41:08 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
build.config.aarch64 ANDROID: add compat cross compiler 2020-04-27 20:20:28 -07:00
build.config.allmodconfig ANDROID: GKI: Fix up "do not export symbol_get/put()" commit 2020-08-01 14:28:51 +02:00
build.config.allmodconfig.aarch64
build.config.allmodconfig.arm ANDROID: Add build.config files for ARM 32-bit 2020-03-15 22:51:11 +00:00
build.config.allmodconfig.x86_64
build.config.arm ANDROID: Add build.config files for ARM 32-bit 2020-03-15 22:51:11 +00:00
build.config.common ANDROID: update the kernel release format for GKI 2020-07-27 22:22:25 +00:00
build.config.db845c ANDROID: build.config.d845c: Set KMI_SYMBOL_LIST 2020-08-26 00:45:21 +00:00
build.config.gki
build.config.gki-debug.aarch64 ANDROID: build: update ABI definitions 2020-07-28 17:39:34 +00:00
build.config.gki-debug.x86_64 ANDROID: build: update ABI definitions 2020-07-28 17:39:34 +00:00
build.config.gki.aarch64 ANDROID: GKI: add abi_gki_aarch64_oplus 2020-08-13 11:48:42 +02:00
build.config.gki.x86_64
build.config.gki_kasan ANDROID: Rename build.config.gki.arch_kasan 2020-05-05 20:50:24 +00:00
build.config.gki_kasan.aarch64 ANDROID: Drop ABI monitoring from KASAN build config 2020-05-06 16:43:25 +00:00
build.config.gki_kasan.x86_64 ANDROID: Rename build.config.gki.arch_kasan 2020-05-05 20:50:24 +00:00
build.config.hikey960 ANDROID: build.config.hikey960: Set KMI_SYMBOL_LIST 2020-08-26 00:45:39 +00:00
build.config.x86_64
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
Makefile This is the 5.4.61 stable release 2020-08-26 11:11:38 +02:00
README
README.md

README.md

How do I submit patches to Android Common Kernels

  1. BEST: Make all of your changes to upstream Linux. If appropriate, backport to the stable releases. These patches will be merged automatically in the corresponding common kernels. If the patch is already in upstream Linux, post a backport of the patch that conforms to the patch requirements below.

  2. LESS GOOD: Develop your patches out-of-tree (from an upstream Linux point-of-view). Unless these are fixing an Android-specific bug, these are very unlikely to be accepted unless they have been coordinated with kernel-team@android.com. If you want to proceed, post a patch that conforms to the patch requirements below.

Common Kernel patch requirements

  • All patches must conform to the Linux kernel coding standards and pass script/checkpatch.pl
  • Patches shall not break gki_defconfig or allmodconfig builds for arm, arm64, x86, x86_64 architectures (see https://source.android.com/setup/build/building-kernels)
  • If the patch is not merged from an upstream branch, the subject must be tagged with the type of patch: UPSTREAM:, BACKPORT:, FROMGIT:, FROMLIST:, or ANDROID:.
  • All patches must have a Change-Id: tag (see https://gerrit-review.googlesource.com/Documentation/user-changeid.html)
  • If an Android bug has been assigned, there must be a Bug: tag.
  • All patches must have a Signed-off-by: tag by the author and the submitter

Additional requirements are listed below based on patch type

Requirements for backports from mainline Linux: UPSTREAM:, BACKPORT:

  • If the patch is a cherry-pick from Linux mainline with no changes at all
    • tag the patch subject with UPSTREAM:.
    • add upstream commit information with a (cherry-picked from ...) line
    • Example:
      • if the upstream commit message is
        important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

    - then Joe Smith would upload the patch for the common kernel as

        UPSTREAM: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        (cherry-picked from c31e73121f4c1ec41143423ac6ce3ce6dafdcec1)
        Signed-off-by: Joe Smith <joe.smith@foo.org>
  • If the patch requires any changes from the upstream version, tag the patch with BACKPORT: instead of UPSTREAM:.
    • use the same tags as UPSTREAM:
    • add comments about the changes under the (cherry-picked from ...) line
    • Example:
        BACKPORT: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        (cherry-picked from c31e73121f4c1ec41143423ac6ce3ce6dafdcec1)
        [ Resolved minor conflict in drivers/foo/bar.c ]
        Signed-off-by: Joe Smith <joe.smith@foo.org>

Requirements for other backports: FROMGIT:, FROMLIST:,

  • If the patch has been merged into an upstream maintainer tree, but has not yet been merged into Linux mainline
    • tag the patch subject with FROMGIT:
    • add info on where the patch came from as (cherry picked from commit <sha1> <repo> <branch>). This must be a stable maintainer branch (not rebased, so don't use linux-next for example).
    • if changes were required, use BACKPORT: FROMGIT:
    • Example:
      • if the commit message in the maintainer tree is
        important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

    - then Joe Smith would upload the patch for the common kernel as

        FROMGIT: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        (cherry picked from commit 878a2fd9de10b03d11d2f622250285c7e63deace
         https://git.kernel.org/pub/scm/linux/kernel/git/foo/bar.git test-branch)
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        Signed-off-by: Joe Smith <joe.smith@foo.org>
  • If the patch has been submitted to LKML, but not accepted into any maintainer tree
    • tag the patch subject with FROMLIST:
    • add a Link: tag with a link to the submittal on lore.kernel.org
    • if changes were required, use BACKPORT: FROMLIST:
    • Example:
        FROMLIST: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        Link: https://lore.kernel.org/lkml/20190619171517.GA17557@someone.com/
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        Signed-off-by: Joe Smith <joe.smith@foo.org>

Requirements for Android-specific patches: ANDROID:

  • If the patch is fixing a bug to Android-specific code
    • tag the patch subject with ANDROID:
    • add a Fixes: tag that cites the patch with the bug
    • Example:
        ANDROID: fix android-specific bug in foobar.c

        This is the detailed description of the important fix

        Fixes: 1234abcd2468 ("foobar: add cool feature")
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        Signed-off-by: Joe Smith <joe.smith@foo.org>
  • If the patch is a new feature
    • tag the patch subject with ANDROID:
    • add a Bug: tag with the Android bug (required for android-specific features)