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authorTejun Heo <htejun@gmail.com>2006-07-26 15:59:26 +0900
committerJeff Garzik <jeff@garzik.org>2006-07-29 04:01:31 -0400
commit0be0aa98985dfec42502c0d0af2a1baff9bdb19f (patch)
tree110f8d9419bc18370ddc410082e65a634d8a8109 /drivers/scsi/scsi_debug.h
parent9f5920567bfabbd1be26112a31c44652b6587394 (diff)
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[PATCH] libata: improve driver initialization and deinitialization
Implement ahci_[de]init_port() and use it during initialization and de-initialization. ahci_[de]init_port() are supersets of what used to be done during driver [de-]initialization. This patch makes the following behavior changes. * Per-port IRQ mask is cleared on driver load as done in other drivers. The mask will be configured properly during probe. * During init_one(), HOST_IRQ_STAT is cleared after masking port IRQs such that there is no race window. * CMD_SPIN_UP is cleared during init_one() instead of being set. It is set in port_start(). This is more consistent with overall structure of initialization. Note that CMD_SPIN_UP simply controls PHY activation. * Slumber and staggered spin-up are handled properly. * All init/deinit operations are done in step-by-step manner as described in the spec instead of issued as single merged command. Original implementation is from Zhao, Forrest <forrest.zhao@intel.com> Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Zhao, Forrest <forrest.zhao@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/scsi/scsi_debug.h')
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