From: zhangtianyang <zhangtianyang@loongson.cn> LoongArch inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICOFL4 CVE: NA -------------------------------- There is no guarantee of sequence between DMA and interrupts on the Loongson platform. Signed-off-by: songwenge <songwenge@loongson.cn> Signed-off-by: zhangtianyang <zhangtianyang@loongson.cn> Change-Id: I20f03062f766eb5b4cfe7e2eef5a8785234ebc09 Signed-off-by: Hongchen Zhang <zhanghongchen@loongson.cn> --- drivers/scsi/megaraid/megaraid_sas_fusion.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index d4b97f0a5013..68cf8840d8c2 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -3881,7 +3881,13 @@ static irqreturn_t megasas_isr_fusion(int irq, void *devp) instance->instancet->clear_intr(instance); return IRQ_HANDLED; } - +#ifdef CONFIG_LOONGARCH + /* + * There is no guarantee of sequence between DMA + * and interrupts on the Loongson platform. + */ + udelay(30); +#endif return complete_cmd_fusion(instance, irq_context->MSIxIndex, irq_context) ? IRQ_HANDLED : IRQ_NONE; } -- 2.33.0