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and not automatically come back if they were gone for a short period of time. The isp(4) driver has a 30 second gone device timer that gets activated whenever a device goes away. If the device comes back before the timer expires, we don't send a notification to CAM that it has gone away. If, however, there is a command sent to the device while it is gone and before it comes back, the isp(4) driver sends the command back with CAM_SEL_TIMEOUT status. CAM responds to the CAM_SEL_TIMEOUT status by removing the device. In the case where a device comes back within the 30 second gone device timer window, though, we weren't telling CAM the device came back. So, fix this by tracking whether we have told CAM the device is gone, and if we have, send a rescan if it comes back within the 30 second window. ispvar.h: In the fcportdb_t structure, add a new bitfield, reported_gone. This gets set whenever we return a command with CAM_SEL_TIMEOUT status on a Fibre Channel device. isp_freebsd.c: In isp_done(), if we're sending CAM_SEL_TIMEOUT for for a command sent to a FC device, set the reported_gone bit. In isp_async(), in the ISPASYNC_DEV_STAYED case, rescan the device in question if it is mapped to a target ID and has been reported gone. In isp_make_here(), take a port database entry argument, and clear the reported_gone bit when we send a rescan to CAM. In isp_make_gone(), take a port database entry as an argument, and set the reported_gone bit when we send an async event telling CAM consumers that the device is gone. Sponsored by: Spectra Logic MFC after: 1 week
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