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By default the scsi_dispatch_cmd_error() return value is displayed in decimal: kworker/3:1H-183 [003] .... 51.035474: scsi_dispatch_cmd_error: host_no=0 channel=0 id=0 lun=4 data_sgl=1 prot_sgl=0 prot_op=SCSI_PROT_NORMAL cmnd=(READ_10 lba=3907214 txlen=1 protect=0 raw=28 00 00 3b 9e 8e 00 00 01 00) rtn=4181 However, these numbers are not particularly helpful wrt. debugging errors. Especially since the kernel code consistently uses the following defines in hexadecimal: SCSI_MLQUEUE_HOST_BUSY 0x1055 SCSI_MLQUEUE_DEVICE_BUSY 0x1056 SCSI_MLQUEUE_EH_RETRY 0x1057 SCSI_MLQUEUE_TARGET_BUSY 0x1058 Switch to using the string form of these values in the trace output: dd-1059 [007] ..... 31.689529: scsi_dispatch_cmd_error: host_no=0 channel=0 id=0 lun=4 data_sgl=65 prot_sgl=0 prot_op=SCSI_PROT_NORMAL driver_tag=23 scheduler_tag=117 cmnd=(READ_10 lba=0 txlen=128 protect=0 raw=28 00 00 00 00 00 00 00 80 00) rtn=SCSI_MLQUEUE_DEVICE_BUSY Signed-off-by: Kassey Li <quic_yingangl@quicinc.com> Link: https://lore.kernel.org/r/20250521011711.1983625-1-quic_yingangl@quicinc.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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 reStructuredText 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.