diff options
| author | Sujit Reddy Thumma <[email protected]> | 2014-05-26 10:59:15 +0530 |
|---|---|---|
| committer | Christoph Hellwig <[email protected]> | 2014-05-28 12:25:13 +0200 |
| commit | e8e7f27139d5ba5b9f05fdee3f6224116ce8427c (patch) | |
| tree | a8e3489ba489593086256f2d996289d9d151c7f5 /net/unix/af_unix.c | |
| parent | 3441da7ddbdedf91bfd5cc8609c571ffc24942dd (diff) | |
scsi: ufs: Improve UFS fatal error handling
Error handling in UFS driver is broken and resets the host controller
for fatal errors without re-initialization. Correct the fatal error
handling sequence according to UFS Host Controller Interface (HCI)
v1.1 specification.
o Processed requests which are completed w/wo error are reported to
SCSI layer and any pending commands that are not started are aborted
in the controller and re-queued into scsi mid-layer queue.
o Upon determining fatal error condition the host controller may hang
forever until a reset is applied. Block SCSI layer for sending new
requests and apply reset in a separate error handling work.
o SCSI is informed about the expected Unit-Attention exception from the
device for the immediate command after a reset so that the SCSI layer
take necessary steps to establish communication with the device.
Signed-off-by: Sujit Reddy Thumma <[email protected]>
Reviewed-by: Yaniv Gardi <[email protected]>
Tested-by: Dolev Raviv <[email protected]>
Acked-by: Vinayak Holikatti <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions