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ahci: compile out msi/msix infrastructure

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Quoting Arnd:
    The AHCI driver is used for some on-chip devices that do not use PCI
    for probing, and it can be built even when CONFIG_PCI is disabled, but
    that now results in a build failure:

    ata/libahci.c: In function 'ahci_host_activate_multi_irqs':
    ata/libahci.c:2475:4: error: invalid use of undefined type 'struct msix_entry'
    ata/libahci.c:2475:21: error: dereferencing pointer to incomplete type 'struct msix_entry'

Add ifdef CONFIG_PCI_MSI infrastructure to compile out the multi-msi and
multi-msix code.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Tested--by: Arnd Bergmann <arnd@arndb.de>
[arnd: fix up pci enabled case]
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Fixes: d684a90d38 ("ahci: per-port msix support")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Dan Williams 2015-12-05 16:18:44 -08:00 committed by Tejun Heo
parent 7e22c0024c
commit f893180b79
2 changed files with 25 additions and 8 deletions
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26
drivers/ata/ahci.h
View file

@ -35,6 +35,7 @@
#ifndef _AHCI_H
#define _AHCI_H
#include <linux/pci.h>
#include <linux/clk.h>
#include <linux/libata.h>
#include <linux/phy/phy.h>
@ -237,12 +238,18 @@ enum {
AHCI_HFLAG_DELAY_ENGINE = (1 << 15), /* do not start engine on
port start (wait until
error-handling stage) */
AHCI_HFLAG_MULTI_MSI = (1 << 16), /* multiple PCI MSIs */
AHCI_HFLAG_NO_DEVSLP = (1 << 17), /* no device sleep */
AHCI_HFLAG_NO_FBS = (1 << 18), /* no FBS */
AHCI_HFLAG_EDGE_IRQ = (1 << 19), /* HOST_IRQ_STAT behaves as
Edge Triggered */
AHCI_HFLAG_MULTI_MSIX = (1 << 20), /* per-port MSI-X */
#ifdef CONFIG_PCI_MSI
AHCI_HFLAG_MULTI_MSI = (1 << 20), /* multiple PCI MSIs */
AHCI_HFLAG_MULTI_MSIX = (1 << 21), /* per-port MSI-X */
#else
/* compile out MSI infrastructure */
AHCI_HFLAG_MULTI_MSI = 0,
AHCI_HFLAG_MULTI_MSIX = 0,
#endif
/* ap->flags bits */
@ -355,6 +362,21 @@ struct ahci_host_priv {
void (*start_engine)(struct ata_port *ap);
};
#ifdef CONFIG_PCI_MSI
static inline int ahci_irq_vector(struct ahci_host_priv *hpriv, int port)
{
if (hpriv->flags & AHCI_HFLAG_MULTI_MSIX)
return hpriv->msix[port].vector;
else
return hpriv->irq + port;
}
#else
static inline int ahci_irq_vector(struct ahci_host_priv *hpriv, int port)
{
return hpriv->irq;
}
#endif
extern int ahci_ignore_sss;
extern struct device_attribute *ahci_shost_attrs[];

7
drivers/ata/libahci.c
View file

@ -2469,12 +2469,7 @@ static int ahci_host_activate_multi_irqs(struct ata_host *host,
*/
for (i = 0; i < host->n_ports; i++) {
struct ahci_port_priv *pp = host->ports[i]->private_data;
int irq;
if (hpriv->flags & AHCI_HFLAG_MULTI_MSIX)
irq = hpriv->msix[i].vector;
else
irq = hpriv->irq + i;
int irq = ahci_irq_vector(hpriv, i);
/* Do not receive interrupts sent by dummy ports */
if (!pp) {