Commit 3e408148 authored by ching Huang's avatar ching Huang Committed by Martin K. Petersen
Browse files

scsi: arcmsr: Fix reading empty buffer length 



Fix empty buffer length error which causes ARECA CLI app command timeout.

Signed-off-by: default avatarching Huang <ching2048@areca.com.tw>
Link: https://lore.kernel.org/r/4aec4385abc6eab10b575c28130ec615a144492d.camel@areca.com.tw


Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent c3e9b937

drivers/scsi/arcmsr/arcmsr_hba.c

+5 −2
Original line number Diff line number Diff line
@@ -2255,8 +2255,11 @@ 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;