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| author | Prabhakar Kushwaha <pkushwaha@marvell.com> | 2020-01-25 06:37:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 18:39:00 +0300 |
| commit | 28a73a946a46397b3f2946dbd718ba4c0d6decab (patch) | |
| tree | 7e87ef8b818f6d1a8e639fb3fb7e2912ca739270 /drivers/ata | |
| parent | 43cac315bec132e962e04c31fe888caac257ec0a (diff) | |
| download | linux-28a73a946a46397b3f2946dbd718ba4c0d6decab.tar.xz | |
ata: ahci: Add shutdown to freeze hardware resources of ahci
commit 10a663a1b15134a5a714aa515e11425a44d4fdf7 upstream.
device_shutdown() called from reboot or power_shutdown expect
all devices to be shutdown. Same is true for even ahci pci driver.
As no ahci shutdown function is implemented, the ata subsystem
always remains alive with DMA & interrupt support. File system
related calls should not be honored after device_shutdown().
So defining ahci pci driver shutdown to freeze hardware (mask
interrupt, stop DMA engine and free DMA resources).
Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ahci.c | 7 | ||||
| -rw-r--r-- | drivers/ata/libata-core.c | 21 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index fa1c5a442957..bbc8710704e2 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -96,6 +96,7 @@ enum board_ids { static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static void ahci_remove_one(struct pci_dev *dev); +static void ahci_shutdown_one(struct pci_dev *dev); static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline); static int ahci_avn_hardreset(struct ata_link *link, unsigned int *class, @@ -609,6 +610,7 @@ static struct pci_driver ahci_pci_driver = { .id_table = ahci_pci_tbl, .probe = ahci_init_one, .remove = ahci_remove_one, + .shutdown = ahci_shutdown_one, .driver = { .pm = &ahci_pci_pm_ops, }, @@ -1897,6 +1899,11 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) return 0; } +static void ahci_shutdown_one(struct pci_dev *pdev) +{ + ata_pci_shutdown_one(pdev); +} + static void ahci_remove_one(struct pci_dev *pdev) { pm_runtime_get_noresume(&pdev->dev); diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b45b6f7722ce..75d582ca917f 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6780,6 +6780,26 @@ void ata_pci_remove_one(struct pci_dev *pdev) ata_host_detach(host); } +void ata_pci_shutdown_one(struct pci_dev *pdev) +{ + struct ata_host *host = pci_get_drvdata(pdev); + int i; + + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + + ap->pflags |= ATA_PFLAG_FROZEN; + + /* Disable port interrupts */ + if (ap->ops->freeze) + ap->ops->freeze(ap); + + /* Stop the port DMA engines */ + if (ap->ops->port_stop) + ap->ops->port_stop(ap); + } +} + /* move to PCI subsystem */ int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) { @@ -7400,6 +7420,7 @@ EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); #ifdef CONFIG_PCI EXPORT_SYMBOL_GPL(pci_test_config_bits); +EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); EXPORT_SYMBOL_GPL(ata_pci_remove_one); #ifdef CONFIG_PM EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |