* [PATCH 3/5] scsi: arcmsr: fixed reading buffer empty length error
@ 2023-03-22 17:20 ching Huang
0 siblings, 0 replies; only message in thread
From: ching Huang @ 2023-03-22 17:20 UTC (permalink / raw)
To: martin.petersen, James.Bottomley, linux-scsi, Linux Kernel Mailing List
From: ching Huang <ching2048@areca.com.tw>
This patch fixed reading buffer empty length error
which cause areca CLI app command timeout.
Signed-off-by: ching Huang <ching2048@areca.com.tw>
---
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index d387a38..587332e 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -2254,8 +2254,11 @@ static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
spin_lock_irqsave(&acb->rqbuffer_lock, flags);
prbuffer = arcmsr_get_iop_rqbuffer(acb);
- buf_empty_len = (acb->rqbuf_putIndex - acb->rqbuf_getIndex - 1) &
- (ARCMSR_MAX_QBUFFER - 1);
+ if (acb->rqbuf_putIndex >= acb->rqbuf_getIndex) {
+ buf_empty_len = (ARCMSR_MAX_QBUFFER - 1) -
+ (acb->rqbuf_putIndex - acb->rqbuf_getIndex);
+ } else
+ buf_empty_len = acb->rqbuf_getIndex - acb->rqbuf_putIndex - 1;
if (buf_empty_len >= readl(&prbuffer->data_len)) {
if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
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2023-03-22 17:20 [PATCH 3/5] scsi: arcmsr: fixed reading buffer empty length error ching Huang
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