Tejun Heo wrote:
ata_probe_ent_alloc() had a temporary hack such that devm_kzalloc() was used for allocation if devres had been previously initialized on the device; otherwise, plain kzalloc() was used. This was to make the code useable from both the old and devres-aware libata drivers during transition. This hack made ata_sas_port_alloc() unable to determine how the probe_ent is allocated, causing double free in some cases. Remove the now-unneeded hack and make ata_sas_port_alloc() use devm_kfree(). Signed-off-by: Tejun Heo <htejun@xxxxxxxxx> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx> --- James, thanks for the diagnosis and please ack if this fixes the problem. Jeff, after James' ack, can you please verify this works with a libata driver? Just loading and unloading a libata LLD should be enough. I'm visiting my hometown for lunar new year's day, so I can't do it till Tuesday. Thanks.
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