Tejun Heo wrote:
SCSI scan may fail due to memory allocation failure even if EH is not in progress. Due to use of GFP_ATOMIC in SCSI scan path, allocation failure isn't too rare especially while probing multiple devices at once which is the case when a bunch of devices are connected to PMP. This patch moves SCSI scan failure detetion logic from ata_scsi_hotplug() to ata_scsi_scan_host() and implement synchronous scan behavior. The synchronous path sleeps briefly and repeats SCSI scan if some devices aren't attached properly. It contains robust retry loop to minimize the chance of device misdetection during boot and falls back to async retry if everything fails. Signed-off-by: Tejun Heo <htejun@xxxxxxxxx> --- drivers/ata/libata-core.c | 2 +- drivers/ata/libata-scsi.c | 63 +++++++++++++++++++++++++++++++++----------- drivers/ata/libata.h | 2 +- 3 files changed, 49 insertions(+), 18 deletions(-)
applied 17-21, though this one makes me nervous. off to test upstream + patchset #1... :)
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