korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-23 20:24:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

ata: libata-core: Do not call ata_dev_power_set_standby() twice

Browse Source 
For regular system shutdown, ata_dev_power_set_standby() will be
executed twice: once the scsi device is removed and another when
ata_pci_shutdown_one() executes and EH completes unloading the devices.

Make the second call to ata_dev_power_set_standby() do nothing by using
ata_dev_power_is_active() and return if the device is already in
standby.

Fixes: 2da4c5e24e ("ata: libata-core: Improve ata_dev_power_set_active()")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
This commit is contained in:
Damien Le Moal 2024-02-19 16:44:30 +01:00 committed by Niklas Cassel
parent 26c8404e16
commit 9cec467d05
1 changed files with 46 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

91
drivers/ata/libata-core.c
View File

@ -2001,51 +2001,6 @@ bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf,
return true;
}
/**
* ata_dev_power_set_standby - Set a device power mode to standby
* @dev: target device
*
* Issue a STANDBY IMMEDIATE command to set a device power mode to standby.
* For an HDD device, this spins down the disks.
*
* LOCKING:
* Kernel thread context (may sleep).
*/
void ata_dev_power_set_standby(struct ata_device *dev)
{
unsigned long ap_flags = dev->link->ap->flags;
struct ata_taskfile tf;
unsigned int err_mask;
/* If the device is already sleeping, do nothing. */
if (dev->flags & ATA_DFLAG_SLEEPING)
return;
/*
* Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5)
* causing some drives to spin up and down again. For these, do nothing
* if we are being called on shutdown.
*/
if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
system_state == SYSTEM_POWER_OFF)
return;
if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
system_entering_hibernation())
return;
/* Issue STANDBY IMMEDIATE command only if supported by the device */
if (!ata_dev_power_init_tf(dev, &tf, false))
return;
ata_dev_notice(dev, "Entering standby power mode\n");
err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
if (err_mask)
ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n",
err_mask);
}
static bool ata_dev_power_is_active(struct ata_device *dev)
{
struct ata_taskfile tf;
@ -2073,6 +2028,52 @@ static bool ata_dev_power_is_active(struct ata_device *dev)
return tf.nsect == 0xff;
}
/**
* ata_dev_power_set_standby - Set a device power mode to standby
* @dev: target device
*
* Issue a STANDBY IMMEDIATE command to set a device power mode to standby.
* For an HDD device, this spins down the disks.
*
* LOCKING:
* Kernel thread context (may sleep).
*/
void ata_dev_power_set_standby(struct ata_device *dev)
{
unsigned long ap_flags = dev->link->ap->flags;
struct ata_taskfile tf;
unsigned int err_mask;
/* If the device is already sleeping or in standby, do nothing. */
if ((dev->flags & ATA_DFLAG_SLEEPING) ||
!ata_dev_power_is_active(dev))
return;
/*
* Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5)
* causing some drives to spin up and down again. For these, do nothing
* if we are being called on shutdown.
*/
if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
system_state == SYSTEM_POWER_OFF)
return;
if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
system_entering_hibernation())
return;
/* Issue STANDBY IMMEDIATE command only if supported by the device */
if (!ata_dev_power_init_tf(dev, &tf, false))
return;
ata_dev_notice(dev, "Entering standby power mode\n");
err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
if (err_mask)
ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n",
err_mask);
}
/**
* ata_dev_power_set_active - Set a device power mode to active
* @dev: target device