Message ID | afdfdf7eabecf14632492c4987a6b9ac6312a7ad.camel@areca.com.tw |
---|---|
State | New |
Headers | show |
Series | [1/2] scsi: arcmsr: fix doorbell status may arrived late on ARC-1886 | expand |
On Thu, 20 May 2021 14:55:15 +0800, ching Huang wrote: > This patch fix the doorbell status coming from IOP may late. > The doorbell status value should not be 0. Applied to 5.14/scsi-queue, thanks! [1/2] scsi: arcmsr: fix doorbell status may arrived late on ARC-1886 https://git.kernel.org/mkp/scsi/c/d9a231226f28 -- Martin K. Petersen Oracle Linux Engineering
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 930972c..98e3d57 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -2419,10 +2419,18 @@ static void arcmsr_hbaD_doorbell_isr(struct AdapterControlBlock *pACB) static void arcmsr_hbaE_doorbell_isr(struct AdapterControlBlock *pACB) { - uint32_t outbound_doorbell, in_doorbell, tmp; + uint32_t outbound_doorbell, in_doorbell, tmp, i; struct MessageUnit_E __iomem *reg = pACB->pmuE; - in_doorbell = readl(®->iobound_doorbell); + if (pACB->adapter_type == ACB_ADAPTER_TYPE_F) { + for (i = 0; i < 5; i++) { + in_doorbell = readl(®->iobound_doorbell); + if (in_doorbell != 0) + break; + } + } + else + in_doorbell = readl(®->iobound_doorbell); outbound_doorbell = in_doorbell ^ pACB->in_doorbell; do { writel(0, ®->host_int_status); /* clear interrupt */