diff options
| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-07-07 20:48:55 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-08 23:37:32 -0700 |
| commit | 4eed4d8ff984abcb983ada5b3dbf56fce35f1068 (patch) | |
| tree | 98a1e4d6d28ae006ef1aba596b25ddc54a0eeaec | |
| parent | 0769636cb5b95665ebadcd1a41c46f331f5a397d (diff) | |
| download | linux-4eed4d8ff984abcb983ada5b3dbf56fce35f1068.tar.gz linux-4eed4d8ff984abcb983ada5b3dbf56fce35f1068.tar.bz2 linux-4eed4d8ff984abcb983ada5b3dbf56fce35f1068.zip | |
3c59x: Fix shared IRQ handling
As its first order of business, boomerang_interrupt() checks whether
the device really has any pending interrupts. If it does not,
it does nothing and returns, but it still returns IRQ_HANDLED.
This is wrong: interrupt was not handled, IRQ handlers of other
devices sharing this IRQ line need to be called.
vortex_interrupt() has it right: it returns IRQ_NONE in this case
via IRQ_RETVAL(0).
Do the same in boomerang_interrupt().
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: David S. Miller <davem@davemloft.net>
CC: linux-kernel@vger.kernel.org
CC: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/3com/3c59x.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c index 41095ebad97f..2d1ce3c5d0dd 100644 --- a/drivers/net/ethernet/3com/3c59x.c +++ b/drivers/net/ethernet/3com/3c59x.c @@ -2382,6 +2382,7 @@ boomerang_interrupt(int irq, void *dev_id) void __iomem *ioaddr; int status; int work_done = max_interrupt_work; + int handled = 0; ioaddr = vp->ioaddr; @@ -2400,6 +2401,7 @@ boomerang_interrupt(int irq, void *dev_id) if ((status & IntLatch) == 0) goto handler_exit; /* No interrupt: shared IRQs can cause this */ + handled = 1; if (status == 0xffff) { /* h/w no longer present (hotplug)? */ if (vortex_debug > 1) @@ -2501,7 +2503,7 @@ boomerang_interrupt(int irq, void *dev_id) handler_exit: vp->handling_irq = 0; spin_unlock(&vp->lock); - return IRQ_HANDLED; + return IRQ_RETVAL(handled); } static int vortex_rx(struct net_device *dev) |