From: Luo Jiaxing Date: Tue, 6 Apr 2021 11:48:30 +0000 (+0800) Subject: scsi: hisi_sas: Warn in v3 hw channel interrupt handler when status reg cleared X-Git-Tag: v5.13-rc1~103^2~73 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2d31cb20a3cd611a9a544f9586eb3908ee2085cf;p=thirdparty%2Fkernel%2Flinux.git scsi: hisi_sas: Warn in v3 hw channel interrupt handler when status reg cleared If a channel interrupt occurs without any status bit set, the handler will return directly. However, if such redundant interrupts are received, it's better to check what happen, so add logs for this. Link: https://lore.kernel.org/r/1617709711-195853-6-git-send-email-john.garry@huawei.com Signed-off-by: Luo Jiaxing Signed-off-by: Yihang Li Signed-off-by: John Garry Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index 0927b0b30b297..499c770d405c7 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -1718,8 +1718,11 @@ static void handle_chl_int1_v3_hw(struct hisi_hba *hisi_hba, int phy_no) int i; irq_value &= ~irq_msk; - if (!irq_value) + if (!irq_value) { + dev_warn(dev, "phy%d channel int 1 received with status bits cleared\n", + phy_no); return; + } for (i = 0; i < ARRAY_SIZE(port_axi_error); i++) { const struct hisi_sas_hw_error *error = &port_axi_error[i]; @@ -1780,8 +1783,11 @@ static void handle_chl_int2_v3_hw(struct hisi_hba *hisi_hba, int phy_no) BIT(CHL_INT2_RX_INVLD_DW_OFF); irq_value &= ~irq_msk; - if (!irq_value) + if (!irq_value) { + dev_warn(dev, "phy%d channel int 2 received with status bits cleared\n", + phy_no); return; + } if (irq_value & BIT(CHL_INT2_SL_IDAF_TOUT_CONF_OFF)) { dev_warn(dev, "phy%d identify timeout\n", phy_no);