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SubjectRe: Latest git oopses during boot
From
On Thu, 7 Feb 2008 12:14:56 +0100
"Harald Arnesen" <skogtun.linux@gmail.com> wrote:

> On 2/7/08, Andrew Morton <akpm@linux-foundation.org> wrote:
> >
> > (cc's restored, and expanded a bit)
>
> Ah, sorry, not used to gmail's web interface. Clicked the wrong button.
>
> > > Seems to be the advansys driver, so I tried to remove it - and indeed,
> > > the kernel now boots. So I guess it's either that driver or my ancient
> > > Nikon Coolscan II that is the only thing attached to the board.
> >
> > Thanks. I uploaded the oops picture to
> > http://userweb.kernel.org/~akpm/oops.jpg
> >
> > > Cc to the Matthew Wilcox added.
> >
> > mm... looks like all Matthew's changes were in 2.6.23. And 2.6.23 worked
> > OK, yes?
>
> Both 2.6.23 and 2.6.24 are ok.
>
> > The only recent changes to drivers/scsi/advansys.c are
> >
> > commit b80ca4f7ee36c26d300c5a8f429e73372d153379
> > Author: FUJITA Tomonori <tomof@acm.org>
> > Date: Sun Jan 13 15:46:13 2008 +0900
> >
> > [SCSI] replace sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE
> >
> > This replaces sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE in
> > several LLDs. It's a preparation for the future changes to remove
> > sense_buffer array in scsi_cmnd structure.
> >
> > Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
> > Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
> >
> > :100644 100644 9dd3952... 492702b... M drivers/scsi/advansys.c
> >
> > commit 747d016e7e25e216b31022fe2b012508d99fb682
> > Author: Randy Dunlap <randy.dunlap@oracle.com>
> > Date: Mon Jan 14 00:55:18 2008 -0800
> >
> > advansys: fix section mismatch warning
> >
> > Fix section mismatch warning:
> >
> > WARNING: vmlinux.o(.exit.text+0x152a): Section mismatch: reference to .init.
> >
> > Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
> > Cc: Matthew Wilcox <willy@debian.org>
> > Cc: James Bottomley <James.Bottomley@steeleye.com>
> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> > Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
> >
> > which seem fairly benign.
> >
> >
> > gcc inlining is going to make it rather a lot of work to find out which
> > statement has actually oopsed there.
> --

Can you try this?

Thanks,

diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c
index 374ed02..f5dde12 100644
--- a/drivers/scsi/advansys.c
+++ b/drivers/scsi/advansys.c
@@ -566,7 +566,7 @@ typedef struct asc_dvc_var {
ASC_SCSI_BIT_ID_TYPE unit_not_ready;
ASC_SCSI_BIT_ID_TYPE queue_full_or_busy;
ASC_SCSI_BIT_ID_TYPE start_motor;
- uchar overrun_buf[ASC_OVERRUN_BSIZE] __aligned(8);
+ uchar *overrun_buf;
dma_addr_t overrun_dma;
uchar scsi_reset_wait;
uchar chip_no;
@@ -13833,6 +13833,12 @@ static int __devinit advansys_board_found(struct Scsi_Host *shost,
*/
if (ASC_NARROW_BOARD(boardp)) {
ASC_DBG(2, "AscInitAsc1000Driver()\n");
+
+ asc_dvc_varp->overrun_buf = kzalloc(ASC_OVERRUN_BSIZE, GFP_KERNEL);
+ if (!asc_dvc_varp->overrun_buf) {
+ ret = -ENOMEM;
+ goto err_free_wide_mem;
+ }
warn_code = AscInitAsc1000Driver(asc_dvc_varp);

if (warn_code || asc_dvc_varp->err_code) {
@@ -13840,8 +13846,10 @@ static int __devinit advansys_board_found(struct Scsi_Host *shost,
"warn 0x%x, error 0x%x\n",
asc_dvc_varp->init_state, warn_code,
asc_dvc_varp->err_code);
- if (asc_dvc_varp->err_code)
+ if (asc_dvc_varp->err_code) {
ret = -ENODEV;
+ kfree(asc_dvc_varp->overrun_buf);
+ }
}
} else {
if (advansys_wide_init_chip(shost))
@@ -13891,9 +13899,11 @@ static int advansys_release(struct Scsi_Host *shost)
free_dma(shost->dma_channel);
}
if (ASC_NARROW_BOARD(board)) {
+ ASC_DVC_VAR *asc_dvc_varp = &board->dvc_var.asc_dvc_var;
dma_unmap_single(board->dev,
board->dvc_var.asc_dvc_var.overrun_dma,
ASC_OVERRUN_BSIZE, DMA_FROM_DEVICE);
+ kfree(asc_dvc_varp->overrun_buf);
} else {
iounmap(board->ioremap_addr);
advansys_wide_free_mem(board);

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