Messages in this thread | | | Date | Fri, 22 Mar 2013 09:11:11 -0600 | From | Jens Axboe <> | Subject | Re: [PATCH] cciss: fix invalid use of sizeof in cciss_find_cfgtables() |
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On Thu, Mar 14 2013, scameron@beardog.cce.hp.com wrote: > On Thu, Mar 14, 2013 at 11:19:45PM +0800, Wei Yongjun wrote: > > From: Wei Yongjun <yongjun_wei@trendmicro.com.cn> > > > > sizeof() when applied to a pointer typed expression gives the > > size of the pointer, not that of the pointed data. > > > > Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> > > --- > > drivers/block/cciss.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c > > index ade58bc..1c1b8e5 100644 > > --- a/drivers/block/cciss.c > > +++ b/drivers/block/cciss.c > > @@ -4206,7 +4206,7 @@ static int cciss_find_cfgtables(ctlr_info_t *h) > > if (rc) > > return rc; > > h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev, > > - cfg_base_addr_index) + cfg_offset, sizeof(h->cfgtable)); > > + cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable)); > > if (!h->cfgtable) > > return -ENOMEM; > > rc = write_driver_ver_to_cfgtable(h->cfgtable); > > > > Ack. > > I suppose it has worked all this time because ioremap can't map less > than a page, and sizeof(*h->cfgtable) is less than a page, and likely > starts on a page boundary.
Queued up for 3.9, thanks.
-- Jens Axboe
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