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[ARM] ARM FAS216: don't modify scsi_cmnd request_bufflen 

SCSI doesn't want drivers to modify request_bufflen, so keep a
driver-private copy of this in the scsi_pointer structure instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-03-04 20:19:07 +00:00 committed by Russell King
parent bb71f99f8d
commit 6b4df7ee1f
2 changed files with 7 additions and 4 deletions
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9
drivers/scsi/arm/fas216.c
View File

@ -633,7 +633,7 @@ static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred)
BUG_ON(bytes_transferred < 0);
info->SCpnt->request_bufflen -= bytes_transferred;
SCp->phase -= bytes_transferred;
while (bytes_transferred != 0) {
if (SCp->this_residual > bytes_transferred)
@ -715,7 +715,7 @@ static void fas216_cleanuptransfer(FAS216_Info *info)
return;
if (dmatype == fasdma_real_all)
total = info->SCpnt->request_bufflen;
total = info->scsi.SCp.phase;
else
total = info->scsi.SCp.this_residual;
@ -753,7 +753,7 @@ static void fas216_transfer(FAS216_Info *info)
fas216_log(info, LOG_BUFFER,
"starttransfer: buffer %p length 0x%06x reqlen 0x%06x",
info->scsi.SCp.ptr, info->scsi.SCp.this_residual,
info->SCpnt->request_bufflen);
info->scsi.SCp.phase);
if (!info->scsi.SCp.ptr) {
fas216_log(info, LOG_ERROR, "null buffer passed to "
@ -784,7 +784,7 @@ static void fas216_transfer(FAS216_Info *info)
info->dma.transfer_type = dmatype;
if (dmatype == fasdma_real_all)
fas216_set_stc(info, info->SCpnt->request_bufflen);
fas216_set_stc(info, info->scsi.SCp.phase);
else
fas216_set_stc(info, info->scsi.SCp.this_residual);
@ -2114,6 +2114,7 @@ fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result)
SCpnt->SCp.buffers_residual = 0;
SCpnt->SCp.ptr = (char *)SCpnt->sense_buffer;
SCpnt->SCp.this_residual = sizeof(SCpnt->sense_buffer);
SCpnt->SCp.phase = sizeof(SCpnt->sense_buffer);
SCpnt->SCp.Message = 0;
SCpnt->SCp.Status = 0;
SCpnt->request_bufflen = sizeof(SCpnt->sense_buffer);

2
drivers/scsi/arm/scsi.h
View File

@ -80,6 +80,7 @@ static inline void init_SCp(struct scsi_cmnd *SCpnt)
(page_address(SCpnt->SCp.buffer->page) +
SCpnt->SCp.buffer->offset);
SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
SCpnt->SCp.phase = SCpnt->request_bufflen;
#ifdef BELT_AND_BRACES
/*
@ -98,6 +99,7 @@ static inline void init_SCp(struct scsi_cmnd *SCpnt)
} else {
SCpnt->SCp.ptr = (unsigned char *)SCpnt->request_buffer;
SCpnt->SCp.this_residual = SCpnt->request_bufflen;
SCpnt->SCp.phase = SCpnt->request_bufflen;
}
/*