2.6.x kernels & PCI-to-PCMCIA bridges [again]
rmk+pcmcia at arm.linux.org.uk
Tue May 11 10:10:20 BST 2004
On Sat, May 08, 2004 at 09:52:27AM +0900, komujun at nifty.com wrote:
> >3. sockets is a global static array. If we ever encounter a machine
> > which has two PCI device/functions whose device/vendor IDs are matched
> > by this driver, we will overwrite this array. *BAD*.
> If two PD6729 is installed in a machine,
> two PD6729 driver will be loaded.
Wrong. You can only load one instance of any particular driver.
In fact, what will happen is that your drivers ->probe method will be
called a _second_ time - once for the first device and again for the
When this happens, your static data for the first device will be
overwritten, possibly leading to a kernel oops at some point later,
as well as the obvious memory leak and non-functioning first device.
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/
2.6 Serial core
More information about the linux-pcmcia