[PATCH v1 1/2] libahci: Implement the function ahci_restart_engine to restart the port dma engine.
From: Suman Tripathi <hidden>
Date: 2014-06-12 11:59:21
Also in:
linux-ide, linux-scsi
Subsystem:
libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Damien Le Moal, Niklas Cassel, Linus Torvalds
This patch implements the function ahci_restart_engine function to restart the port dma engine. Signed-off-by: Loc Ho <redacted> Signed-off-by: Suman Tripathi <redacted> --- drivers/ata/ahci.h | 1 + drivers/ata/libahci.c | 10 ++++++++++ 2 files changed, 11 insertions(+)
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index af63c75..3c1760e 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h@@ -372,6 +372,7 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, int ahci_stop_engine(struct ata_port *ap); void ahci_start_engine(struct ata_port *ap); +int ahci_restart_engine(struct ata_port *ap); int ahci_check_ready(struct ata_link *link); int ahci_kick_engine(struct ata_port *ap); int ahci_port_resume(struct ata_port *ap);
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index b986145..3358ce9 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c@@ -742,6 +742,16 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, return 0; } +int ahci_restart_engine(struct ata_port *ap) +{ + ahci_stop_engine(ap); + ahci_start_fis_rx(ap); + ahci_start_engine(ap); + + return 0; +} +EXPORT_SYMBOL_GPL(ahci_restart_engine); + #ifdef CONFIG_PM static void ahci_power_down(struct ata_port *ap) { --
1.8.2.1