Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

e1000: Fix msi enable leak on error, don't print error message, cleanup

Browse source 
pci_enable_msi failure is a normal event so we should not print any error.
Going over the code I spotted a missing pci_disable_msi() leak when irq
allocation fails. The whole code also needed a cleanup, so I combined the
two different calls to pci_request_irq into a single call making this
look a lot better. All #ifdef CONFIG_PCI_MSI's have been removed.

Compile tested with both CONFIG_PCI_MSI enabled and disabled.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Auke Kok 2007-05-16 01:49:46 -07:00 committed by Jeff Garzik
parent fb136c070b
commit e94bd23f67
2 changed files with 15 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/net/e1000/e1000.h
View file

@ -333,11 +333,9 @@ struct e1000_adapter {
struct e1000_tx_ring test_tx_ring;
struct e1000_rx_ring test_rx_ring;
int msg_enable;
#ifdef CONFIG_PCI_MSI
boolean_t have_msi;
#endif
/* to not mess up cache alignment, always add to the bottom */
boolean_t tso_force;
boolean_t smart_power_down; /* phy smart power down */

39
drivers/net/e1000/e1000_main.c
View file

@ -158,9 +158,7 @@ static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
static int e1000_set_mac(struct net_device *netdev, void *p);
static irqreturn_t e1000_intr(int irq, void *data);
#ifdef CONFIG_PCI_MSI
static irqreturn_t e1000_intr_msi(int irq, void *data);
#endif
static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring);
#ifdef CONFIG_E1000_NAPI
@ -300,31 +298,26 @@ module_exit(e1000_exit_module);
static int e1000_request_irq(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int flags, err = 0;
void (*handler) = &e1000_intr;
int irq_flags = IRQF_SHARED;
int err;
flags = IRQF_SHARED;
#ifdef CONFIG_PCI_MSI
if (adapter->hw.mac_type >= e1000_82571) {
adapter->have_msi = TRUE;
if ((err = pci_enable_msi(adapter->pdev))) {
DPRINTK(PROBE, ERR,
"Unable to allocate MSI interrupt Error: %d\n", err);
adapter->have_msi = FALSE;
adapter->have_msi = !pci_enable_msi(adapter->pdev);
if (adapter->have_msi) {
handler = &e1000_intr_msi;
irq_flags = 0;
}
}
if (adapter->have_msi) {
flags &= ~IRQF_SHARED;
err = request_irq(adapter->pdev->irq, &e1000_intr_msi, flags,
netdev->name, netdev);
if (err)
DPRINTK(PROBE, ERR,
"Unable to allocate interrupt Error: %d\n", err);
} else
#endif
if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
netdev->name, netdev)))
err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
netdev);
if (err) {
if (adapter->have_msi)
pci_disable_msi(adapter->pdev);
DPRINTK(PROBE, ERR,
"Unable to allocate interrupt Error: %d\n", err);
}
return err;
}
@ -335,10 +328,8 @@ static void e1000_free_irq(struct e1000_adapter *adapter)
free_irq(adapter->pdev->irq, netdev);
#ifdef CONFIG_PCI_MSI
if (adapter->have_msi)
pci_disable_msi(adapter->pdev);
#endif
}
/**
@ -3744,7 +3735,6 @@ e1000_update_stats(struct e1000_adapter *adapter)
spin_unlock_irqrestore(&adapter->stats_lock, flags);
}
#ifdef CONFIG_PCI_MSI
/**
* e1000_intr_msi - Interrupt Handler
@ -3810,7 +3800,6 @@ e1000_intr_msi(int irq, void *data)
return IRQ_HANDLED;
}
#endif
/**
* e1000_intr - Interrupt Handler