Date: Tue, 16 Aug 2011 08:41:37 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r224905 - head/sys/dev/arcmsr Message-ID: <201108160841.p7G8fbrR048790@svn.freebsd.org>
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Author: delphij Date: Tue Aug 16 08:41:37 2011 New Revision: 224905 URL: http://svn.freebsd.org/changeset/base/224905 Log: Update arcmsr(4) to 1.20.00.22 to solve recursive acquisition of buffer mutex, which would lead to a deadlock. Many thanks to Areca for their continued support of FreeBSD. Submitted by: Ching Huang <ching2048 areca com tw> Tested by: Willem Jan Withagen <wjw digiware nl> MFC after: 3 days Approved by: re (kib) Modified: head/sys/dev/arcmsr/arcmsr.c Modified: head/sys/dev/arcmsr/arcmsr.c ============================================================================== --- head/sys/dev/arcmsr/arcmsr.c Tue Aug 16 08:41:09 2011 (r224904) +++ head/sys/dev/arcmsr/arcmsr.c Tue Aug 16 08:41:37 2011 (r224905) @@ -68,6 +68,7 @@ ** 1.20.00.21 02/08/2011 Ching Huang Implement I/O request timeout ** 02/14/2011 Ching Huang Modified pktRequestCount ** 1.20.00.21 03/03/2011 Ching Huang if a command timeout, then wait its ccb back before free it +** 1.20.00.22 07/04/2011 Ching Huang Fixed multiple MTX panic ****************************************************************************************** * $FreeBSD$ */ @@ -150,7 +151,7 @@ #define arcmsr_callout_init(a) callout_init(a); #endif -#define ARCMSR_DRIVER_VERSION "Driver Version 1.20.00.21 2010-03-03" +#define ARCMSR_DRIVER_VERSION "Driver Version 1.20.00.22 2011-07-04" #include <dev/arcmsr/arcmsr.h> #define SRB_SIZE ((sizeof(struct CommandControlBlock)+0x1f) & 0xffe0) #define ARCMSR_SRBS_POOL_SIZE (SRB_SIZE * ARCMSR_MAX_FREESRB_NUM) @@ -1293,11 +1294,15 @@ static void arcmsr_stop_adapter_bgrb(str static void arcmsr_poll(struct cam_sim * psim) { struct AdapterControlBlock *acb; + int mutex; acb = (struct AdapterControlBlock *)cam_sim_softc(psim); - ARCMSR_LOCK_ACQUIRE(&acb->qbuffer_lock); + mutex = mtx_owned(&acb->qbuffer_lock); + if( mutex == 0 ) + ARCMSR_LOCK_ACQUIRE(&acb->qbuffer_lock); arcmsr_interrupt(acb); - ARCMSR_LOCK_RELEASE(&acb->qbuffer_lock); + if( mutex == 0 ) + ARCMSR_LOCK_RELEASE(&acb->qbuffer_lock); return; } /* @@ -2089,8 +2094,11 @@ struct CommandControlBlock * arcmsr_get_ { struct CommandControlBlock *srb=NULL; u_int32_t workingsrb_startindex, workingsrb_doneindex; + int mutex; - ARCMSR_LOCK_ACQUIRE(&acb->qbuffer_lock); + mutex = mtx_owned(&acb->qbuffer_lock); + if( mutex == 0 ) + ARCMSR_LOCK_ACQUIRE(&acb->qbuffer_lock); workingsrb_doneindex=acb->workingsrb_doneindex; workingsrb_startindex=acb->workingsrb_startindex; srb=acb->srbworkingQ[workingsrb_startindex]; @@ -2101,7 +2109,8 @@ struct CommandControlBlock * arcmsr_get_ } else { srb=NULL; } - ARCMSR_LOCK_RELEASE(&acb->qbuffer_lock); + if( mutex == 0 ) + ARCMSR_LOCK_RELEASE(&acb->qbuffer_lock); return(srb); } /*
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