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Message-ID: <0d0475a1-c042-8025-f215-d81d04748b75@roeck-us.net>
Date: Wed, 8 Jul 2020 12:10:55 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: "kernelci.org bot" <bot@...nelci.org>, gtucker@...labora.com,
kernelci-results@...ups.io,
Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc: linux-kernel@...r.kernel.org, Benson Leung <bleung@...omium.org>,
Guenter Roeck <groeck@...omium.org>
Subject: Re: chrome-platform/for-kernelci bisection:
baseline.bootrr.rockchip-dp-probed on rk3399-gru-kevin
On 7/8/20 11:59 AM, kernelci.org bot wrote:
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> * This automated bisection report was sent to you on the basis *
> * that you may be involved with the breaking commit it has *
> * found. No manual investigation has been done to verify it, *
> * and the root cause of the problem may be somewhere else. *
> * *
> * If you do send a fix, please include this trailer: *
> * Reported-by: "kernelci.org bot" <bot@...nelci.org> *
> * *
> * Hope this helps! *
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>
> chrome-platform/for-kernelci bisection: baseline.bootrr.rockchip-dp-probed on rk3399-gru-kevin
>
> Summary:
> Start: 154353417996 KERNELCI: x86_64_defconfig: Enable support for Chromebooks devices
> Plain log: https://storage.kernelci.org/chrome-platform/for-kernelci/v5.8-rc1-20-g154353417996/arm64/defconfig/gcc-8/lab-collabora/baseline-rk3399-gru-kevin.txt
> HTML log: https://storage.kernelci.org/chrome-platform/for-kernelci/v5.8-rc1-20-g154353417996/arm64/defconfig/gcc-8/lab-collabora/baseline-rk3399-gru-kevin.html
> Result: 8c9a6ef40bf4 platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes
>
> Checks:
> revert: PASS
> verify: PASS
>
> Parameters:
> Tree: chrome-platform
> URL: https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git
> Branch: for-kernelci
> Target: rk3399-gru-kevin
> CPU arch: arm64
> Lab: lab-collabora
> Compiler: gcc-8
> Config: defconfig
> Test case: baseline.bootrr.rockchip-dp-probed
>
> Breaking commit found:
>
> -------------------------------------------------------------------------------
> commit 8c9a6ef40bf400c64c9907031bd32b59f9d4aea2
> Author: Guenter Roeck <linux@...ck-us.net>
> Date: Sat Jul 4 07:26:07 2020 -0700
>
> platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes
>
> The EC reports a variety of error codes. Most of those, with the exception
> of EC_RES_INVALID_VERSION, are converted to -EPROTO. As result, the actual
> error code gets lost. Convert all EC errors to Linux error codes to report
> a more meaningful error to the caller to aid debugging.
>
Interesting. Well, good that the patch was abandoned, so I don't expect this
to be a problem in practice.
Guenter
> Cc: Yu-Hsuan Hsu <yuhsuan@...omium.org>
> Cc: Prashant Malani <pmalani@...omium.org>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>
> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> index 3e745e0fe092..10aa9e483d35 100644
> --- a/drivers/platform/chrome/cros_ec_proto.c
> +++ b/drivers/platform/chrome/cros_ec_proto.c
> @@ -543,6 +543,29 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
> }
> EXPORT_SYMBOL(cros_ec_cmd_xfer);
>
> +static const int cros_ec_error_map[] = {
> + [EC_RES_INVALID_COMMAND] = -EOPNOTSUPP,
> + [EC_RES_ERROR] = -EIO,
> + [EC_RES_INVALID_PARAM] = -EINVAL,
> + [EC_RES_ACCESS_DENIED] = -EACCES,
> + [EC_RES_INVALID_RESPONSE] = -EPROTO,
> + [EC_RES_INVALID_VERSION] = -ENOTSUPP,
> + [EC_RES_INVALID_CHECKSUM] = -EBADMSG,
> + [EC_RES_IN_PROGRESS] = -EINPROGRESS,
> + [EC_RES_UNAVAILABLE] = -ENODATA,
> + [EC_RES_TIMEOUT] = -ETIMEDOUT,
> + [EC_RES_OVERFLOW] = -EOVERFLOW,
> + [EC_RES_INVALID_HEADER] = -EBADR,
> + [EC_RES_REQUEST_TRUNCATED] = -EBADR,
> + [EC_RES_RESPONSE_TOO_BIG] = -EFBIG,
> + [EC_RES_BUS_ERROR] = -EFAULT,
> + [EC_RES_BUSY] = -EBUSY,
> + [EC_RES_INVALID_HEADER_VERSION] = -EBADMSG,
> + [EC_RES_INVALID_HEADER_CRC] = -EBADMSG,
> + [EC_RES_INVALID_DATA_CRC] = -EBADMSG,
> + [EC_RES_DUP_UNAVAILABLE] = -ENODATA,
> +};
> +
> /**
> * cros_ec_cmd_xfer_status() - Send a command to the ChromeOS EC.
> * @ec_dev: EC device.
> @@ -555,8 +578,7 @@ EXPORT_SYMBOL(cros_ec_cmd_xfer);
> *
> * Return:
> * >=0 - The number of bytes transferred
> - * -ENOTSUPP - Operation not supported
> - * -EPROTO - Protocol error
> + * <0 - Linux error code
> */
> int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> struct cros_ec_command *msg)
> @@ -566,13 +588,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> ret = cros_ec_cmd_xfer(ec_dev, msg);
> if (ret < 0) {
> dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret);
> - } else if (msg->result == EC_RES_INVALID_VERSION) {
> - dev_dbg(ec_dev->dev, "Command invalid version (err:%d)\n",
> - msg->result);
> - return -ENOTSUPP;
> } else if (msg->result != EC_RES_SUCCESS) {
> - dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> - return -EPROTO;
> + if (msg->result < ARRAY_SIZE(cros_ec_error_map) && cros_ec_error_map[msg->result])
> + ret = cros_ec_error_map[msg->result];
> + else
> + ret = -EPROTO;
> + dev_dbg(ec_dev->dev, "Command result (err: %d [%d])\n", msg->result, ret);
> }
>
> return ret;
> -------------------------------------------------------------------------------
>
>
> Git bisection log:
>
> -------------------------------------------------------------------------------
> git bisect start
> # good: [b3a9e3b9622ae10064826dccb4f7a52bd88c7407] Linux 5.8-rc1
> git bisect good b3a9e3b9622ae10064826dccb4f7a52bd88c7407
> # bad: [15435341799604f20adcbb5f69b7f0beb2a2f964] KERNELCI: x86_64_defconfig: Enable support for Chromebooks devices
> git bisect bad 15435341799604f20adcbb5f69b7f0beb2a2f964
> # good: [3c5ca501b46b91e68b935b4bd752a0aba5232208] platform/chrome: cros_ec_spi: Document missing function parameters
> git bisect good 3c5ca501b46b91e68b935b4bd752a0aba5232208
> # good: [20b736872f7f324438649a277ec711a646ce8e8d] platform/chrome: cros_ec_typec: Add PM support
> git bisect good 20b736872f7f324438649a277ec711a646ce8e8d
> # bad: [8c9a6ef40bf400c64c9907031bd32b59f9d4aea2] platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes
> git bisect bad 8c9a6ef40bf400c64c9907031bd32b59f9d4aea2
> # good: [e48bc01ed5adec203676c735365373b31c3c7600] platform/chrome: cros_ec_sensorhub: Fix EC timestamp overflow
> git bisect good e48bc01ed5adec203676c735365373b31c3c7600
> # first bad commit: [8c9a6ef40bf400c64c9907031bd32b59f9d4aea2] platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes
> -------------------------------------------------------------------------------
>
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