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| author | Stephen Hemminger <shemminger@vyatta.com> | 2009-10-01 09:11:46 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-02 00:14:55 +0200 |
| commit | 66466797c7e2406579724e42eb9cfe05d53a882b (patch) | |
| tree | 59cba1a51a5a1911aca1608af473c907b7b077af /drivers/net/sky2.h | |
| parent | skge: use unique IRQ name (diff) | |
| download | linux-66466797c7e2406579724e42eb9cfe05d53a882b.tar.xz linux-66466797c7e2406579724e42eb9cfe05d53a882b.zip | |
sky2: irqname based on pci address
This is based on Michal Schmidt fix for skge.
Most network drivers request their IRQ when the interface is activated.
sky2 does it in ->probe() instead, because it can work with two-port
cards where the two net_devices use the same IRQ. This works fine most
of the time, except in some situations when the interface gets renamed.
Consider this example:
1. modprobe sky2
The card is detected as eth0 and requests IRQ 17. Directory
/proc/irq/17/eth0 is created.
2. There is an udev rule which says this interface should be called
eth1, so udev renames eth0 -> eth1.
3. modprobe 8139too
The Realtek card is detected as eth0. It will be using IRQ 17 too.
4. ip link set eth0 up
Now 8139too requests IRQ 17.
The result is:
WARNING: at fs/proc/generic.c:590 proc_register ...
proc_dir_entry '17/eth0' already registered
The fix is for sky2 to name the irq based on the pci device, as is done
by some other devices DRM, infiniband, ... ie. sky2@pci:0000:00:00
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Reviewed-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/sky2.h')
| -rw-r--r-- | drivers/net/sky2.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h index e0f23a101043..ed54129698b4 100644 --- a/drivers/net/sky2.h +++ b/drivers/net/sky2.h @@ -2085,6 +2085,8 @@ struct sky2_hw { struct timer_list watchdog_timer; struct work_struct restart_work; wait_queue_head_t msi_wait; + + char irq_name[0]; }; static inline int sky2_is_copper(const struct sky2_hw *hw) |