From 66acdb0309507950376393f2fb1c8e7482fb4d52 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Sun, 29 Jul 2007 22:24:09 +0300 Subject: [PATCH] [SCSI] aha152x: Clean Reset path What Reset code was doing: Save command's important/dangerous Info on stack. NULL those members from scsi_cmnd. Issue a Reset. wait for it to finish than restore members and return. What I do is save or NULL nothing. But use the "resetting" hint in aha152x_internal_queue() to NULL out working members and leave struct scsi_cmnd alone. The indent here looks funny but it will change/drop in last patch and it is clear this way what changed. Signed-off-by: James Bottomley --- drivers/scsi/aha152x.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c index dc7d84bae9..d7ca86f9d1 100644 --- a/drivers/scsi/aha152x.c +++ b/drivers/scsi/aha152x.c @@ -1022,6 +1022,14 @@ static int aha152x_internal_queue(Scsi_Cmnd *SCpnt, struct completion *complete, SCp.buffer : next buffer SCp.buffers_residual : left buffers in list SCp.phase : current state of the command */ + + if(phase & resetting) { + SCpnt->SCp.ptr = NULL; + SCpnt->SCp.this_residual = 0; + SCpnt->resid = 0; + SCpnt->SCp.buffer = NULL; + SCpnt->SCp.buffers_residual = 0; + } else { if (SCpnt->use_sg) { SCpnt->SCp.buffer = (struct scatterlist *) SCpnt->request_buffer; SCpnt->SCp.ptr = SG_ADDRESS(SCpnt->SCp.buffer); @@ -1033,6 +1041,7 @@ static int aha152x_internal_queue(Scsi_Cmnd *SCpnt, struct completion *complete, SCpnt->SCp.buffer = NULL; SCpnt->SCp.buffers_residual = 0; } + } DO_LOCK(flags); @@ -1150,9 +1159,6 @@ static int aha152x_device_reset(Scsi_Cmnd * SCpnt) DECLARE_COMPLETION(done); int ret, issued, disconnected; unsigned char old_cmd_len = SCpnt->cmd_len; - unsigned short old_use_sg = SCpnt->use_sg; - void *old_buffer = SCpnt->request_buffer; - unsigned old_bufflen = SCpnt->request_bufflen; unsigned long flags; unsigned long timeleft; @@ -1174,9 +1180,6 @@ static int aha152x_device_reset(Scsi_Cmnd * SCpnt) DO_UNLOCK(flags); SCpnt->cmd_len = 0; - SCpnt->use_sg = 0; - SCpnt->request_buffer = NULL; - SCpnt->request_bufflen = 0; aha152x_internal_queue(SCpnt, &done, resetting, reset_done); @@ -1189,9 +1192,6 @@ static int aha152x_device_reset(Scsi_Cmnd * SCpnt) } SCpnt->cmd_len = old_cmd_len; - SCpnt->use_sg = old_use_sg; - SCpnt->request_buffer = old_buffer; - SCpnt->request_bufflen = old_bufflen; DO_LOCK(flags); -- 2.39.5