diff options
author | Suman Tripathi <stripathi@apm.com> | 2016-02-06 05:55:23 (GMT) |
---|---|---|
committer | Tejun Heo <tj@kernel.org> | 2016-02-11 14:54:04 (GMT) |
commit | d867b95f965457b9e85fb061ef8e3fdc029116ed (patch) | |
tree | 200ca18b681ca23d2aeeddc7da6cb665f29063e0 /drivers/ata/libahci.c | |
parent | f070d6715509dafc0af223577c896fe3d204ca88 (diff) | |
download | linux-d867b95f965457b9e85fb061ef8e3fdc029116ed.tar.xz |
ata: Remove the AHCI_HFLAG_EDGE_IRQ support from libahci.
The flexibility to override the irq handles in the LLD's are already
present, so controllers implementing a edge trigger latch can
implement their own interrupt handler inside the driver. This patch
removes the AHCI_HFLAG_EDGE_IRQ support from libahci and moves edge
irq handling to ahci_xgene.
tj: Minor update to description.
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kenrel.org>
Diffstat (limited to 'drivers/ata/libahci.c')
-rw-r--r-- | drivers/ata/libahci.c | 43 |
1 files changed, 1 insertions, 42 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index cbfe8a2..513b3fa 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -113,8 +113,6 @@ static ssize_t ahci_store_em_buffer(struct device *dev, const char *buf, size_t size); static ssize_t ahci_show_em_supported(struct device *dev, struct device_attribute *attr, char *buf); -static irqreturn_t ahci_single_edge_irq_intr(int irq, void *dev_instance); - static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance); static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); @@ -517,9 +515,7 @@ void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv) hpriv->start_engine = ahci_start_engine; if (!hpriv->irq_handler) - hpriv->irq_handler = (hpriv->flags & AHCI_HFLAG_EDGE_IRQ) ? - ahci_single_edge_irq_intr : - ahci_single_level_irq_intr; + hpriv->irq_handler = ahci_single_level_irq_intr; } EXPORT_SYMBOL_GPL(ahci_save_initial_config); @@ -1882,43 +1878,6 @@ u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked) } EXPORT_SYMBOL_GPL(ahci_handle_port_intr); -static irqreturn_t ahci_single_edge_irq_intr(int irq, void *dev_instance) -{ - struct ata_host *host = dev_instance; - struct ahci_host_priv *hpriv; - unsigned int rc = 0; - void __iomem *mmio; - u32 irq_stat, irq_masked; - - VPRINTK("ENTER\n"); - - hpriv = host->private_data; - mmio = hpriv->mmio; - - /* sigh. 0xffffffff is a valid return from h/w */ - irq_stat = readl(mmio + HOST_IRQ_STAT); - if (!irq_stat) - return IRQ_NONE; - - irq_masked = irq_stat & hpriv->port_map; - - spin_lock(&host->lock); - - /* - * HOST_IRQ_STAT behaves as edge triggered latch meaning that - * it should be cleared before all the port events are cleared. - */ - writel(irq_stat, mmio + HOST_IRQ_STAT); - - rc = ahci_handle_port_intr(host, irq_masked); - - spin_unlock(&host->lock); - - VPRINTK("EXIT\n"); - - return IRQ_RETVAL(rc); -} - static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance) { struct ata_host *host = dev_instance; |