tree 117fce53d60b1f08346ee9fa64c6b0c6fe72b4bf
parent 20888d83687d5cb374cdb5b0afa746ab79666f4e
author Tejun Heo <htejun@gmail.com> 1149067675 +0900
committer Tejun Heo <htejun@gmail.com> 1149067675 +0900

[PATCH] sata_sil: new interrupt handler

The DMA complete bit of these controllers reflects ATA IRQ status
while no DMA command is in progress.  So, we can tell whether the
controller is raising an interrupt or not in deterministic manner.
This patch gives sata_sil its own interrupt handler which behaves much
better than the original one in terms of error detection and handling.
This change is also necessary for later hotplug support.

Further improvements are possible, in both 2 and 4 ports versions, we
can get all status with only one readl and using custom bmdma
operations can further cut down register accesses.

Signed-off-by: Tejun Heo <htejun@gmail.com>