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authorDamien Le Moal <dlemoal@kernel.org>2024-03-19 16:12:09 +0900
committerMartin K. Petersen <martin.petersen@oracle.com>2024-03-25 15:46:12 -0400
commit0c76106cb97548810214def8ee22700bbbb90543 (patch)
tree45b04799b3d3d4e1282df4b11f2cffce8f96fb6c /drivers/scsi/sd.c
parent27f58c04a8f438078583041468ec60597841284d (diff)
scsi: sd: Fix TCG OPAL unlock on system resume
Commit 3cc2ffe5c16d ("scsi: sd: Differentiate system and runtime start/stop management") introduced the manage_system_start_stop scsi_device flag to allow libata to indicate to the SCSI disk driver that nothing should be done when resuming a disk on system resume. This change turned the execution of sd_resume() into a no-op for ATA devices on system resume. While this solved deadlock issues during device resume, this change also wrongly removed the execution of opal_unlock_from_suspend(). As a result, devices with TCG OPAL locking enabled remain locked and inaccessible after a system resume from sleep. To fix this issue, introduce the SCSI driver resume method and implement it with the sd_resume() function calling opal_unlock_from_suspend(). The former sd_resume() function is renamed to sd_resume_common() and modified to call the new sd_resume() function. For non-ATA devices, this result in no functional changes. In order for libata to explicitly execute sd_resume() when a device is resumed during system restart, the function scsi_resume_device() is introduced. libata calls this function from the revalidation work executed on devie resume, a state that is indicated with the new device flag ATA_DFLAG_RESUMING. Doing so, locked TCG OPAL enabled devices are unlocked on resume, allowing normal operation. Fixes: 3cc2ffe5c16d ("scsi: sd: Differentiate system and runtime start/stop management") Link: https://bugzilla.kernel.org/show_bug.cgi?id=218538 Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Link: https://lore.kernel.org/r/20240319071209.1179257-1-dlemoal@kernel.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/sd.c')
-rw-r--r--drivers/scsi/sd.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index ccff8f2e2e75..3cf898670290 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -4108,7 +4108,21 @@ static int sd_suspend_runtime(struct device *dev)
return sd_suspend_common(dev, true);
}
-static int sd_resume(struct device *dev, bool runtime)
+static int sd_resume(struct device *dev)
+{
+ struct scsi_disk *sdkp = dev_get_drvdata(dev);
+
+ sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
+
+ if (opal_unlock_from_suspend(sdkp->opal_dev)) {
+ sd_printk(KERN_NOTICE, sdkp, "OPAL unlock failed\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int sd_resume_common(struct device *dev, bool runtime)
{
struct scsi_disk *sdkp = dev_get_drvdata(dev);
int ret;
@@ -4124,7 +4138,7 @@ static int sd_resume(struct device *dev, bool runtime)
sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
ret = sd_start_stop_device(sdkp, 1);
if (!ret) {
- opal_unlock_from_suspend(sdkp->opal_dev);
+ sd_resume(dev);
sdkp->suspended = false;
}
@@ -4143,7 +4157,7 @@ static int sd_resume_system(struct device *dev)
return 0;
}
- return sd_resume(dev, false);
+ return sd_resume_common(dev, false);
}
static int sd_resume_runtime(struct device *dev)
@@ -4170,7 +4184,7 @@ static int sd_resume_runtime(struct device *dev)
"Failed to clear sense data\n");
}
- return sd_resume(dev, true);
+ return sd_resume_common(dev, true);
}
static const struct dev_pm_ops sd_pm_ops = {
@@ -4193,6 +4207,7 @@ static struct scsi_driver sd_template = {
.pm = &sd_pm_ops,
},
.rescan = sd_rescan,
+ .resume = sd_resume,
.init_command = sd_init_command,
.uninit_command = sd_uninit_command,
.done = sd_done,