[PATCH v3 1/2] libahci: Add support to handle HOST_IRQ_STAT as edge trigger latch.
From: Sergei Shtylyov <hidden>
Date: 2015-05-04 13:08:08
Also in:
linux-devicetree, linux-ide, linux-scsi
Hello. On 5/3/2015 6:33 PM, Suman Tripathi wrote:
This patch adds the support to handle HOST_IRQ_STAT as edge trigger latch.
Signed-off-by: Suman Tripathi <redacted> --- drivers/ata/ahci.h | 2 ++ drivers/ata/libahci.c | 19 +++++++++++++++++++ 2 files changed, 21 insertions(+)
quoted hunk
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h index 71262e0..2df2237 100644 --- a/drivers/ata/ahci.h +++ b/drivers/ata/ahci.h
[...]
quoted hunk
+++ b/drivers/ata/libahci.c@@ -1879,6 +1879,25 @@ static irqreturn_t ahci_single_irq_intr(int irq, void *dev_instance) */ writel(irq_stat, mmio + HOST_IRQ_STAT); + /* + * HOST_IRQ_STAT behaves as edge trigger latch. When HOST_IRQ_STAT + * detects a egde from PORT_IRQ_STAT, it happens to loose interrupts
s/loose/lose/.
MBR, Sergei