From 793bf193b18e9bff6c4280268bbffd16a5b533e5 Mon Sep 17 00:00:00 2001 From: TJ Adams Date: Mon, 6 Jul 2026 14:00:54 -0700 Subject: [PATCH] ata: libata-core: Allow capacity transition to zero for locked drives Commit 91842ed844a0 ("ata: libata-core: Set capacity to zero for a security locked drive") introduced setting the device capacity (n_sectors) to zero in ata_dev_configure() if the drive is security locked. However, during runtime revalidation, ata_dev_revalidate() compares the new capacity (now 0) with the old capacity (>0) and detects a mismatch. Since it does not consider the locked status, it returns -ENODEV. This revalidation failure can occur when doing a reset of the PHY (e.g. hard reset) for a controller that has I/Os in flight. The timed out I/Os trigger the SCSI Error Handling (EH) path, which in turn invokes libata device revalidation. If the drive is locked at runtime (e.g. it lost power during reset and relocked), revalidation sees the capacity transition to zero and fails, eventually disabling the device. Fix this by allowing the capacity transition to zero in ata_dev_revalidate() if the drive is reported as security locked by ata_id_is_locked(). Fixes: 91842ed844a0 ("ata: libata-core: Set capacity to zero for a security locked drive") Cc: stable@vger.kernel.org Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Terrence Adams Signed-off-by: Damien Le Moal --- drivers/ata/libata-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 3c06a15952f8..c43bd28b20b1 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -3992,7 +3992,7 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, /* verify n_sectors hasn't changed */ if (dev->class != ATA_DEV_ATA || !n_sectors || - dev->n_sectors == n_sectors) + dev->n_sectors == n_sectors || ata_id_is_locked(dev->id)) return 0; /* n_sectors has changed */ -- 2.47.3