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[ Upstream commit 982cf37da3ee0f1e3e20d97e19f13cba79be51c7 ] On i.MX8MM, we are running Dual Linux OS, with 1st Linux using SD Card as rootfs storage, 2nd Linux using eMMC as rootfs storage. We let the the 1st linux configure power/clock for the 2nd Linux. When the 2nd Linux is booting into rootfs stage, we let the 1st Linux to destroy the 2nd linux, then restart the 2nd linux, we met SDHCI dump as following, after we clear the pending interrupt and halt CQCTL, issue gone. [ 1.334594] mmc2: Got command interrupt 0x00000001 even though no command operation was in progress. [ 1.334595] mmc2: sdhci: ============ SDHCI REGISTER DUMP =========== [ 1.334599] mmc2: sdhci: Sys addr: 0xa05dcc00 | Version: 0x00000002 [ 1.345538] mmc2: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000000 [ 1.345541] mmc2: sdhci: Argument: 0x00018000 | Trn mode: 0x00000033 [ 1.345543] mmc2: sdhci: Present: 0x01f88008 | Host ctl: 0x00000031 [ 1.345547] mmc2: sdhci: Power: 0x00000002 | Blk gap: 0x00000080 [ 1.357903] mmc2: sdhci: Wake-up: 0x00000008 | Clock: 0x0000003f [ 1.357905] mmc2: sdhci: Timeout: 0x0000008f | Int stat: 0x00000000 [ 1.357908] mmc2: sdhci: Int enab: 0x107f100b | Sig enab: 0x107f100b [ 1.357911] mmc2: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000502 [ 1.370268] mmc2: sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000b400 [ 1.370270] mmc2: sdhci: Cmd: 0x00000d1a | Max curr: 0x00ffffff [ 1.370273] mmc2: sdhci: Resp[0]: 0x00000b00 | Resp[1]: 0xffffffff [ 1.370276] mmc2: sdhci: Resp[2]: 0x328f5903 | Resp[3]: 0x00d00f00 [ 1.382132] mmc2: sdhci: Host ctl2: 0x00000000 [ 1.382135] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0xa2040208 [ 2.060932] mmc2: Unexpected interrupt 0x00004000. [ 2.065538] mmc2: sdhci: ============ SDHCI REGISTER DUMP =========== [ 2.071720] mmc2: sdhci: Sys addr: 0x00000000 | Version: 0x00000002 [ 2.077902] mmc2: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000001 [ 2.084083] mmc2: sdhci: Argument: 0x00000000 | Trn mode: 0x00000000 [ 2.090264] mmc2: sdhci: Present: 0x01f88009 | Host ctl: 0x00000011 [ 2.096446] mmc2: sdhci: Power: 0x00000002 | Blk gap: 0x00000080 [ 2.102627] mmc2: sdhci: Wake-up: 0x00000008 | Clock: 0x000010ff [ 2.108809] mmc2: sdhci: Timeout: 0x0000008f | Int stat: 0x00004000 [ 2.114990] mmc2: sdhci: Int enab: 0x007f1003 | Sig enab: 0x007f1003 [ 2.121171] mmc2: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000502 [ 2.127353] mmc2: sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000b400 [ 2.133534] mmc2: sdhci: Cmd: 0x0000371a | Max curr: 0x00ffffff [ 2.139715] mmc2: sdhci: Resp[0]: 0x00000900 | Resp[1]: 0xffffffff [ 2.145896] mmc2: sdhci: Resp[2]: 0x328f5903 | Resp[3]: 0x00d00f00 [ 2.152077] mmc2: sdhci: Host ctl2: 0x00000000 [ 2.156342] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000 Signed-off-by: Haibo Chen <haibo.chen@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/1582100757-20683-6-git-send-email-haibo.chen@nxp.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Stable-dep-of: 1e336aa0c025 ("mmc: sdhci-esdhc-imx: correct the tuning start tap and step setting") Signed-off-by: Sasha Levin <sashal@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.