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When a SCSI device is offline a MODE SENSE command will return a result with only DID_NO_CONNECT set. In sd_read_write_protect_flag() only the status byte of the result is checked. Despite a returned status of DID_NO_CONNECT the command is considered successful and we read sdkp->write_prot from a buffer containing garbage. Modify scsi_status_is_good() to treat DID_NO_CONNECT as a failure case. Link: https://lore.kernel.org/r/20210330114727.234467-1-yanaijie@huawei.com Signed-off-by: Jason Yan <yanaijie@huawei.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 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.