sfc: Fix IRQ cleanup in case of a probe failure
The lifetime of an irq_cpu_rmap is odd: we have to allocate it before installing IRQ handlers and free it before removing the IRQ handlers. As a result of this asymmetry, it was omitted from some failure paths. On another failure path, we could try to remove IRQ handlers we had not yet installed. Move the irq_cpu_rmap allocation and freeing alongside IRQ handler installation and removal, in efx_nic_{init,fini}_interrupts(). Count the number of IRQ handlers successfully installed and only remove those on the failure path. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Родитель
e79255de85
Коммит
1899c111a5
|
@ -21,7 +21,6 @@
|
|||
#include <linux/ethtool.h>
|
||||
#include <linux/topology.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/cpu_rmap.h>
|
||||
#include <linux/aer.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include "net_driver.h"
|
||||
|
@ -1284,29 +1283,6 @@ static unsigned int efx_wanted_parallelism(struct efx_nic *efx)
|
|||
return count;
|
||||
}
|
||||
|
||||
static int
|
||||
efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries)
|
||||
{
|
||||
#ifdef CONFIG_RFS_ACCEL
|
||||
unsigned int i;
|
||||
int rc;
|
||||
|
||||
efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels);
|
||||
if (!efx->net_dev->rx_cpu_rmap)
|
||||
return -ENOMEM;
|
||||
for (i = 0; i < efx->n_rx_channels; i++) {
|
||||
rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap,
|
||||
xentries[i].vector);
|
||||
if (rc) {
|
||||
free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
|
||||
efx->net_dev->rx_cpu_rmap = NULL;
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Probe the number and type of interrupts we are able to obtain, and
|
||||
* the resulting numbers of channels and RX queues.
|
||||
*/
|
||||
|
@ -1360,11 +1336,6 @@ static int efx_probe_interrupts(struct efx_nic *efx)
|
|||
efx->n_tx_channels = n_channels;
|
||||
efx->n_rx_channels = n_channels;
|
||||
}
|
||||
rc = efx_init_rx_cpu_rmap(efx, xentries);
|
||||
if (rc) {
|
||||
pci_disable_msix(efx->pci_dev);
|
||||
return rc;
|
||||
}
|
||||
for (i = 0; i < efx->n_channels; i++)
|
||||
efx_get_channel(efx, i)->irq =
|
||||
xentries[i].vector;
|
||||
|
@ -2608,10 +2579,6 @@ static void efx_pci_remove_main(struct efx_nic *efx)
|
|||
BUG_ON(efx->state == STATE_READY);
|
||||
cancel_work_sync(&efx->reset_work);
|
||||
|
||||
#ifdef CONFIG_RFS_ACCEL
|
||||
free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
|
||||
efx->net_dev->rx_cpu_rmap = NULL;
|
||||
#endif
|
||||
efx_stop_interrupts(efx, false);
|
||||
efx_nic_fini_interrupt(efx);
|
||||
efx_fini_port(efx);
|
||||
|
|
|
@ -14,6 +14,7 @@
|
|||
#include <linux/pci.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/cpu_rmap.h>
|
||||
#include "net_driver.h"
|
||||
#include "bitfield.h"
|
||||
#include "efx.h"
|
||||
|
@ -1706,6 +1707,7 @@ void efx_nic_push_rx_indir_table(struct efx_nic *efx)
|
|||
int efx_nic_init_interrupt(struct efx_nic *efx)
|
||||
{
|
||||
struct efx_channel *channel;
|
||||
unsigned int n_irqs;
|
||||
int rc;
|
||||
|
||||
if (!EFX_INT_MODE_USE_MSI(efx)) {
|
||||
|
@ -1726,7 +1728,19 @@ int efx_nic_init_interrupt(struct efx_nic *efx)
|
|||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_RFS_ACCEL
|
||||
if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
|
||||
efx->net_dev->rx_cpu_rmap =
|
||||
alloc_irq_cpu_rmap(efx->n_rx_channels);
|
||||
if (!efx->net_dev->rx_cpu_rmap) {
|
||||
rc = -ENOMEM;
|
||||
goto fail1;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Hook MSI or MSI-X interrupt */
|
||||
n_irqs = 0;
|
||||
efx_for_each_channel(channel, efx) {
|
||||
rc = request_irq(channel->irq, efx_msi_interrupt,
|
||||
IRQF_PROBE_SHARED, /* Not shared */
|
||||
|
@ -1737,13 +1751,31 @@ int efx_nic_init_interrupt(struct efx_nic *efx)
|
|||
"failed to hook IRQ %d\n", channel->irq);
|
||||
goto fail2;
|
||||
}
|
||||
++n_irqs;
|
||||
|
||||
#ifdef CONFIG_RFS_ACCEL
|
||||
if (efx->interrupt_mode == EFX_INT_MODE_MSIX &&
|
||||
channel->channel < efx->n_rx_channels) {
|
||||
rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap,
|
||||
channel->irq);
|
||||
if (rc)
|
||||
goto fail2;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
fail2:
|
||||
efx_for_each_channel(channel, efx)
|
||||
#ifdef CONFIG_RFS_ACCEL
|
||||
free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
|
||||
efx->net_dev->rx_cpu_rmap = NULL;
|
||||
#endif
|
||||
efx_for_each_channel(channel, efx) {
|
||||
if (n_irqs-- == 0)
|
||||
break;
|
||||
free_irq(channel->irq, &efx->channel[channel->channel]);
|
||||
}
|
||||
fail1:
|
||||
return rc;
|
||||
}
|
||||
|
@ -1753,11 +1785,14 @@ void efx_nic_fini_interrupt(struct efx_nic *efx)
|
|||
struct efx_channel *channel;
|
||||
efx_oword_t reg;
|
||||
|
||||
#ifdef CONFIG_RFS_ACCEL
|
||||
free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
|
||||
efx->net_dev->rx_cpu_rmap = NULL;
|
||||
#endif
|
||||
|
||||
/* Disable MSI/MSI-X interrupts */
|
||||
efx_for_each_channel(channel, efx) {
|
||||
if (channel->irq)
|
||||
free_irq(channel->irq, &efx->channel[channel->channel]);
|
||||
}
|
||||
efx_for_each_channel(channel, efx)
|
||||
free_irq(channel->irq, &efx->channel[channel->channel]);
|
||||
|
||||
/* ACK legacy interrupt */
|
||||
if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
|
||||
|
|
Загрузка…
Ссылка в новой задаче