Re: [PATCH] 64bit resource: fix up printks for resources in ide drivers
From: Vivek Goyal
Date: Thu Jun 29 2006 - 16:11:44 EST
On Thu, Jun 29, 2006 at 12:51:10PM -0700, Greg KH wrote:
> On Thu, Jun 29, 2006 at 03:41:13PM -0400, Jeff Garzik wrote:
> > Linux Kernel Mailing List wrote:
> > >commit 08f46de9a0e7c293db34cf44f9451d18ef609770
> > >tree 83c28b79165adee350aad8cb9d4e2e59486acf56
> > >parent 176dfc633bbe4e03f4557d2beeefb4f0cc7f0efa
> > >author Greg Kroah-Hartman <gregkh@xxxxxxx> Tue, 13 Jun 2006 05:15:59 -0700
> > >committer Greg Kroah-Hartman <gregkh@xxxxxxx> Tue, 27 Jun 2006 23:23:59
> > >-0700
> > >
> > >[PATCH] 64bit resource: fix up printks for resources in ide drivers
> > >
> > >This is needed if we wish to change the size of the resource structures.
> > >
> > >Based on an original patch from Vivek Goyal <vgoyal@xxxxxxxxxx>
> > >
> > >Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
> > >Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
> > >Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
> > >
> > > drivers/ide/pci/aec62xx.c | 3 ++-
> > > drivers/ide/pci/cmd64x.c | 3 ++-
> > > drivers/ide/pci/hpt34x.c | 2 +-
> > > drivers/ide/pci/pdc202xx_new.c | 4 ++--
> > > drivers/ide/pci/pdc202xx_old.c | 4 ++--
> > > 5 files changed, 9 insertions(+), 7 deletions(-)
> > >
> > >diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
> > >index c743e68..8d5b872 100644
> > >--- a/drivers/ide/pci/aec62xx.c
> > >+++ b/drivers/ide/pci/aec62xx.c
> > >@@ -254,7 +254,8 @@ static unsigned int __devinit init_chips
> > >
> > > if (dev->resource[PCI_ROM_RESOURCE].start) {
> > > pci_write_config_dword(dev, PCI_ROM_ADDRESS,
> > > dev->resource[PCI_ROM_RESOURCE].start |
> > > PCI_ROM_ADDRESS_ENABLE);
> > >- printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
> > >dev->resource[PCI_ROM_RESOURCE].start);
> > >+ printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
> > >+ (unsigned
> > >long)dev->resource[PCI_ROM_RESOURCE].start);
> > > }
> > >
> > > if (bus_speed <= 33)
> > >diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
> > >index 3d9c7af..9828039 100644
> > >--- a/drivers/ide/pci/cmd64x.c
> > >+++ b/drivers/ide/pci/cmd64x.c
> > >@@ -609,7 +609,8 @@ static unsigned int __devinit init_chips
> > > #ifdef __i386__
> > > if (dev->resource[PCI_ROM_RESOURCE].start) {
> > > pci_write_config_dword(dev, PCI_ROM_ADDRESS,
> > > dev->resource[PCI_ROM_RESOURCE].start |
> > > PCI_ROM_ADDRESS_ENABLE);
> > >- printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
> > >dev->resource[PCI_ROM_RESOURCE].start);
> > >+ printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
> > >+ (unsigned
> > >long)dev->resource[PCI_ROM_RESOURCE].start);
> > > }
> > > #endif
> > >
> > >diff --git a/drivers/ide/pci/hpt34x.c b/drivers/ide/pci/hpt34x.c
> > >index be334da..7da5502 100644
> > >--- a/drivers/ide/pci/hpt34x.c
> > >+++ b/drivers/ide/pci/hpt34x.c
> > >@@ -176,7 +176,7 @@ static unsigned int __devinit init_chips
> > > pci_write_config_dword(dev, PCI_ROM_ADDRESS,
> > > dev->resource[PCI_ROM_RESOURCE].start |
> > > PCI_ROM_ADDRESS_ENABLE);
> > > printk(KERN_INFO "HPT345: ROM enabled at 0x%08lx\n",
> > >- dev->resource[PCI_ROM_RESOURCE].start);
> > >+ (unsigned
> > >long)dev->resource[PCI_ROM_RESOURCE].start);
> > > }
> > > pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
> > > } else {
> > >diff --git a/drivers/ide/pci/pdc202xx_new.c
> > >b/drivers/ide/pci/pdc202xx_new.c
> > >index acd6317..20d5965 100644
> > >--- a/drivers/ide/pci/pdc202xx_new.c
> > >+++ b/drivers/ide/pci/pdc202xx_new.c
> > >@@ -313,8 +313,8 @@ static unsigned int __devinit init_chips
> > > if (dev->resource[PCI_ROM_RESOURCE].start) {
> > > pci_write_config_dword(dev, PCI_ROM_ADDRESS,
> > > dev->resource[PCI_ROM_RESOURCE].start |
> > > PCI_ROM_ADDRESS_ENABLE);
> > >- printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n",
> > >- name, dev->resource[PCI_ROM_RESOURCE].start);
> > >+ printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
> > >+ (unsigned
> > >long)dev->resource[PCI_ROM_RESOURCE].start);
> > > }
> > >
> > > #ifdef CONFIG_PPC_PMAC
> > >diff --git a/drivers/ide/pci/pdc202xx_old.c
> > >b/drivers/ide/pci/pdc202xx_old.c
> > >index 22d1754..ffbef74 100644
> > >--- a/drivers/ide/pci/pdc202xx_old.c
> > >+++ b/drivers/ide/pci/pdc202xx_old.c
> > >@@ -544,8 +544,8 @@ static unsigned int __devinit init_chips
> > > if (dev->resource[PCI_ROM_RESOURCE].start) {
> > > pci_write_config_dword(dev, PCI_ROM_ADDRESS,
> > > dev->resource[PCI_ROM_RESOURCE].start |
> > > PCI_ROM_ADDRESS_ENABLE);
> > >- printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n",
> > >- name, dev->resource[PCI_ROM_RESOURCE].start);
> > >+ printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
> > >+ (unsigned
> > >long)dev->resource[PCI_ROM_RESOURCE].start);
> >
> > Why cast to unsigned long here? Won't that truncate the data in certain
> > cases, now that it is 64bit?
> >
> > Other printk patches seem to use unsigned long long, as I would expect.
>
> Yes it will truncate stuff. Vivek, any reason you did it this way for
> the ide drivers?
>
Initially I had kept it unsigned long long but later changed to unsigned long
because of following response from Alan Cox.
[start]
> pci_write_config_dword(dev, PCI_ROM_ADDRESS,
dev->resource[PCI_ROM_RESOURCE].start | PCI_ROM_ADDRESS_ENABLE);
> - printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
dev->resource[PCI_ROM_RESOURCE].start);
> + printk(KERN_INFO "%s: ROM enabled at 0x%016llx\n", name,
> + (unsigned long
long)dev->resource[PCI_ROM_RESOURCE].start);
NAK - if the resource is 64bit then the pci_write_config_dword is also
insufficient. Ditto for each other example.
We actually know the PCI resources for these are 32bit so this change
shouldn't be needed. You might want to stick a (u32) or (unsigned long)
cast in and leave it at that.
As far as I can tell all the ROM whacking code is bogus anyway
[end]
Thanks
Vivek
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