[libata] sata_sx4: fixup interrupt handling
Issuing ATA_CMD_SET_FEATURES (0xef) times out because pdc20621_interrupt ignores command completion since ATA_TFLAG_POLLING flag is set. This has already been fixed for sata_promise: commit 51b94d2a Author: Tejun Heo <htejun@gmail.com> Date: Fri Jun 8 13:46:55 2007 -0700 sata_promise: use TF interface for polling NODATA commands Also, this patch includes Mikael's original patches: http://marc.info/?l=linux-ide&m=121135828227724&w=2 http://marc.info/?l=linux-ide&m=121144512109826&w=2Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David Milburn <dmilburn@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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