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Re: [PATCH 3/5]pci:bus.c Fix variable 'retval' set but not used

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On 06/15/2010 10:42 PM, Julian Calaby wrote:
On Wed, Jun 16, 2010 at 15:33, Justin P. Mattock
<justinmattock@xxxxxxxxx>  wrote:
The patch below fixes the warning message I am seeing with gcc 4.6.0
  CC      drivers/pci/bus.o
drivers/pci/bus.c: In function 'pci_enable_bridges':
drivers/pci/bus.c:237:6: warning: variable 'retval' set but not used

  Signed-off-by: Justin P. Mattock<justinmattock@xxxxxxxxx>

---
  drivers/pci/bus.c |    2 --
  1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 628ea20..84bdb48 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -234,12 +234,10 @@ void pci_bus_add_devices(const struct pci_bus *bus)
  void pci_enable_bridges(struct pci_bus *bus)
  {
        struct pci_dev *dev;
-       int retval;

        list_for_each_entry(dev,&bus->devices, bus_list) {
                if (dev->subordinate) {
                        if (!pci_is_enabled(dev)) {
-                               retval = pci_enable_device(dev);
                                pci_set_master(dev);
                        }
                        pci_enable_bridges(dev->subordinate);

Er, this appears to be bogus: I'm only guessing, but I'd expect that
the pci_enable_device() call is actually doing something useful, and
removing it is going to break *something* - Have you booted a kernel
with this code enabled and these patches applied?

As for this warning, I think that there is a better solution.

Thanks,


alright!!

Justin P. Mattock
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