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arcmsr(4): Fix reading buffer empty length error.

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MFC after:	2 weeks
This commit is contained in:
黃清隆 2023-03-31 22:43:43 -07:00 committed by Xin LI
parent 4e703f445e
commit 285d85f4f9
1 changed files with 6 additions and 3 deletions
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9
sys/dev/arcmsr/arcmsr.c
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@ -87,6 +87,7 @@
** scatter-gather count large than some number
** 1.50.00.03 05/04/2021 Ching Huang Fixed doorbell status arrived late on ARC-1886
** 1.50.00.04 12/08/2021 Ching Huang Fixed boot up hung under ARC-1886 with no volume created
** 1.50.00.05 03/23/2023 Ching Huang Fixed reading buffer empty length error
******************************************************************************************
*/
@ -144,7 +145,7 @@ __FBSDID("$FreeBSD$");
#define arcmsr_callout_init(a) callout_init(a, /*mpsafe*/1);
#define ARCMSR_DRIVER_VERSION "arcmsr version 1.50.00.04 2021-12-08"
#define ARCMSR_DRIVER_VERSION "arcmsr version 1.50.00.05 2023-03-23"
#include <dev/arcmsr/arcmsr.h>
/*
**************************************************************************
@ -1555,8 +1556,10 @@ static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
/*check this iop data if overflow my rqbuffer*/
ARCMSR_LOCK_ACQUIRE(&acb->qbuffer_lock);
prbuffer = arcmsr_get_iop_rqbuffer(acb);
my_empty_len = (acb->rqbuf_lastindex - acb->rqbuf_firstindex - 1) &
(ARCMSR_MAX_QBUFFER-1);
if (acb->rqbuf_lastindex >= acb->rqbuf_firstindex)
my_empty_len = (ARCMSR_MAX_QBUFFER - 1) - (acb->rqbuf_lastindex - acb->rqbuf_firstindex);
else
my_empty_len = acb->rqbuf_firstindex - acb->rqbuf_lastindex - 1;
if(my_empty_len >= prbuffer->data_len) {
if(arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;