On 10/15/2009 10:37 AM, Tejun Heo wrote:
Commit 842faa6c1a1d6faddf3377948e5cf214812c6c90 fixed error handling during attach by not committing detected device class to dev->class while attaching a new device. However, this change missed the PMP class check in the configuration loop causing a new PMP device to go through ata_dev_configure() as if it were an ATA or ATAPI device. As PMP device doesn't have a regular IDENTIFY data, this makes ata_dev_configure() tries to configure a PMP device using an invalid data. For the most part, it wasn't too harmful and went unnoticed but this ends up clearing dev->flags which may have ATA_DFLAG_AN set by sata_pmp_attach(). This means that SATA_PMP_FEAT_NOTIFY ends up being disabled on PMPs and on PMPs which honor the flag breaks hotplug support. This problem was discovered and reported by Ethan Hsiao. Signed-off-by: Tejun Heo<tj@xxxxxxxxxx> Reported-by: Ethan Hsiao<ethanhsiao@xxxxxxxxxxx> Cc: stable@xxxxxxxxxx --- drivers/ata/libata-eh.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
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