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authorAlexander Gordeev <agordeev@redhat.com>2014-09-25 15:13:21 +0200
committerTejun Heo <tj@kernel.org>2014-09-28 17:43:56 +0200
commitc3ebd6a9b614ef1fbb5a44a3a33cd639ff4694bf (patch)
treedf33c8be5ae2ac6d0bbd21400a643df9b8de9b5f /drivers/ata
parentlibata-sff: Fix controllers with no ctl port (diff)
downloadlinux-c3ebd6a9b614ef1fbb5a44a3a33cd639ff4694bf.tar.xz
linux-c3ebd6a9b614ef1fbb5a44a3a33cd639ff4694bf.zip
AHCI: Cleanup checking of multiple MSIs/SLM modes
Sharing Last Message (SLM) mode is currently checked in two functions: ahci_host_activate() and ahci_init_interrupts(). This update consolidates SLM mode check with activation of multiple MSIs mode. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: linux-ide@vger.kernel.org
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ahci.c18
-rw-r--r--drivers/ata/ahci.h2
2 files changed, 8 insertions, 12 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c880699a7d0b..f68a995ec3fd 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1211,6 +1211,9 @@ static int ahci_init_interrupts(struct pci_dev *pdev, unsigned int n_ports,
goto single_msi;
}
+ if (nvec > 1)
+ hpriv->flags |= AHCI_HFLAG_MULTI_MSI;
+
return nvec;
single_msi:
@@ -1227,7 +1230,6 @@ intx:
* ahci_host_activate - start AHCI host, request IRQs and register it
* @host: target ATA host
* @irq: base IRQ number to request
- * @n_msis: number of MSIs allocated for this host
* @irq_handler: irq_handler used when requesting IRQs
* @irq_flags: irq_flags used when requesting IRQs
*
@@ -1241,14 +1243,10 @@ intx:
* RETURNS:
* 0 on success, -errno otherwise.
*/
-int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis)
+int ahci_host_activate(struct ata_host *host, int irq)
{
int i, rc;
- /* Sharing Last Message among several ports is not supported */
- if (n_msis < host->n_ports)
- return -EINVAL;
-
rc = ata_host_start(host);
if (rc)
return rc;
@@ -1296,7 +1294,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
struct device *dev = &pdev->dev;
struct ahci_host_priv *hpriv;
struct ata_host *host;
- int n_ports, n_msis, i, rc;
+ int n_ports, i, rc;
int ahci_pci_bar = AHCI_PCI_BAR_STANDARD;
VPRINTK("ENTER\n");
@@ -1437,9 +1435,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
*/
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
- n_msis = ahci_init_interrupts(pdev, n_ports, hpriv);
- if (n_msis > 1)
- hpriv->flags |= AHCI_HFLAG_MULTI_MSI;
+ ahci_init_interrupts(pdev, n_ports, hpriv);
host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
if (!host)
@@ -1492,7 +1488,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
if (hpriv->flags & AHCI_HFLAG_MULTI_MSI)
- return ahci_host_activate(host, pdev->irq, n_msis);
+ return ahci_host_activate(host, pdev->irq);
return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
&ahci_sht);
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 90156ff1e9cb..a074c7301504 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -392,7 +392,7 @@ irqreturn_t ahci_interrupt(int irq, void *dev_instance);
irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance);
irqreturn_t ahci_thread_fn(int irq, void *dev_instance);
void ahci_print_info(struct ata_host *host, const char *scc_s);
-int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis);
+int ahci_host_activate(struct ata_host *host, int irq);
void ahci_error_handler(struct ata_port *ap);
static inline void __iomem *__ahci_port_base(struct ata_host *host,