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[ Upstream commit 9413532788df7470297dd0475995c5dc5b07f362 ] As a unconstrained command, a command can be sent to SATA disk even if SATA disk status is BUSY, ERR or DRQ. If an ATA reset assert is successful but ATA reset de-assert fails, then it will retry the reset de-assert. If reset de- assert retry is successful, we think it is okay to probe the device but actually it still has Err status. Apparently we need to retry the ATA reset assertion and de- assertion instead for this mentioned scenario. As such, we config ATA reset assert as a constrained command, if ATA reset de-assert fails, then ATA reset de-assert retry will also fail. Then we will retry the proper process of ATA reset assert and de-assert again. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.