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It is an implicit regulation that error code that function returned should be negative. But hisi_sas_task_prep() doesn't follow this. This may cause problems in the upper layer code. For example, in sas_expander.c of libsas, smp_execute_task_sg() may return the number of bytes of underrun. It will be conflicted with the scenaio lldd_execute_task() return an positive error code. This patch change the return value from SAS_PHY_DOWN to -ECOMM in hisi_sas_task_prep(). Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.