From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stanley Chu Subject: [PATCH v1 0/3] scsi: ufs: add error handlings of auto-hibern8 Date: Mon, 13 May 2019 22:36:23 +0800 Message-ID: <1557758186-18706-1-git-send-email-stanley.chu@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: linux-scsi@vger.kernel.org, martin.petersen@oracle.com, avri.altman@wdc.com, alim.akhtar@samsung.com, pedrom.sousa@synopsys.com Cc: marc.w.gonzalez@free.fr, andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, evgreen@chromium.org, subhashj@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, vivek.gautam@codeaurora.org, matthias.bgg@gmail.com, sayalil@codeaurora.org, Stanley Chu , linux-arm-kernel@lists.infradead.org, beanhuo@micron.com List-Id: linux-scsi@vger.kernel.org Currently auto-hibern8 is activated if host supports auto-hibern8 capability. However no error handlings are existed thus this feature is kind of risky. If "Hibernate Enter" or "Hibernate Exit" fail happens during auto-hibern8 flow, the corresponding interrupt "UIC_HIBERNATE_ENTER" or "UIC_HIBERNATE_EXIT" shall be raised according to UFS specification. This patch adds auto-hibern8 error handlings: - Monitor "Hibernate Enter" and "Hibernate Exit" interrupts after auto-hibern8 feature is activated. - If fail happens, trigger error handlings just like "manual-hibernate" fail and use the same flow: Identify errors and schedule UFS error handler in ufshcd_check_errors(), and then do host reset and restore in UFS error handler. Stanley Chu (3): scsi: ufs: do not overwrite auto-hibern8 timer scsi: ufs: add error handling of auto-hibern8 scsi: ufs: use re-factored auto_hibern8 function drivers/scsi/ufs/ufshcd.c | 16 +++++++++++++++- drivers/scsi/ufs/ufshcd.h | 13 +++++++++++++ drivers/scsi/ufs/ufshci.h | 3 +++ 3 files changed, 31 insertions(+), 1 deletion(-) -- 2.18.0