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author | Christoph Hellwig <hch@lst.de> | 2006-04-01 19:21:04 +0200 |
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committer | Jeff Garzik <jeff@garzik.org> | 2006-04-10 14:15:47 -0400 |
commit | 9227c33de80ac01f269ed33624990ce84358e419 (patch) | |
tree | 7678d342949db011d37e15516c3eaa22ec32ff2a /Documentation | |
parent | 676165a8af7167f488abdcce6851a9bc36e83254 (diff) | |
download | kernel_i9300_mainline-9227c33de80ac01f269ed33624990ce84358e419.zip kernel_i9300_mainline-9227c33de80ac01f269ed33624990ce84358e419.tar.gz kernel_i9300_mainline-9227c33de80ac01f269ed33624990ce84358e419.tar.bz2 |
[PATCH] move ->eh_strategy_handler to the transport class
Overriding the whole EH code is a per-transport, not per-host thing.
Move ->eh_strategy_handler to the transport class, same as
->eh_timed_out.
Downside is that scsi_host_alloc can't check for the total lack of EH
anymore, but the transition period from old EH where we needed it is
long gone already.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/DocBook/libata.tmpl | 2 | ||||
-rw-r--r-- | Documentation/scsi/scsi_eh.txt | 14 | ||||
-rw-r--r-- | Documentation/scsi/scsi_mid_low_api.txt | 19 |
3 files changed, 8 insertions, 27 deletions
diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl index 5bcbb6e..f869b03 100644 --- a/Documentation/DocBook/libata.tmpl +++ b/Documentation/DocBook/libata.tmpl @@ -705,7 +705,7 @@ and other resources, etc. <sect1><title>ata_scsi_error()</title> <para> - ata_scsi_error() is the current hostt->eh_strategy_handler() + ata_scsi_error() is the current transportt->eh_strategy_handler() for libata. As discussed above, this will be entered in two cases - timeout and ATAPI error completion. This function calls low level libata driver's eng_timeout() callback, the diff --git a/Documentation/scsi/scsi_eh.txt b/Documentation/scsi/scsi_eh.txt index 331afd7..ce767b9 100644 --- a/Documentation/scsi/scsi_eh.txt +++ b/Documentation/scsi/scsi_eh.txt @@ -19,9 +19,9 @@ TABLE OF CONTENTS [2-1-1] Overview [2-1-2] Flow of scmds through EH [2-1-3] Flow of control - [2-2] EH through hostt->eh_strategy_handler() - [2-2-1] Pre hostt->eh_strategy_handler() SCSI midlayer conditions - [2-2-2] Post hostt->eh_strategy_handler() SCSI midlayer conditions + [2-2] EH through transportt->eh_strategy_handler() + [2-2-1] Pre transportt->eh_strategy_handler() SCSI midlayer conditions + [2-2-2] Post transportt->eh_strategy_handler() SCSI midlayer conditions [2-2-3] Things to consider @@ -413,9 +413,9 @@ scmd->allowed. layer of failure of the scmds. -[2-2] EH through hostt->eh_strategy_handler() +[2-2] EH through transportt->eh_strategy_handler() - hostt->eh_strategy_handler() is invoked in the place of + transportt->eh_strategy_handler() is invoked in the place of scsi_unjam_host() and it is responsible for whole recovery process. On completion, the handler should have made lower layers forget about all failed scmds and either ready for new commands or offline. Also, @@ -424,7 +424,7 @@ SCSI midlayer. IOW, of the steps described in [2-1-2], all steps except for #1 must be implemented by eh_strategy_handler(). -[2-2-1] Pre hostt->eh_strategy_handler() SCSI midlayer conditions +[2-2-1] Pre transportt->eh_strategy_handler() SCSI midlayer conditions The following conditions are true on entry to the handler. @@ -437,7 +437,7 @@ except for #1 must be implemented by eh_strategy_handler(). - shost->host_failed == shost->host_busy -[2-2-2] Post hostt->eh_strategy_handler() SCSI midlayer conditions +[2-2-2] Post transportt->eh_strategy_handler() SCSI midlayer conditions The following conditions must be true on exit from the handler. diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt index 8bbae3e..75a535a 100644 --- a/Documentation/scsi/scsi_mid_low_api.txt +++ b/Documentation/scsi/scsi_mid_low_api.txt @@ -804,7 +804,6 @@ Summary: eh_bus_reset_handler - issue SCSI bus reset eh_device_reset_handler - issue SCSI device reset eh_host_reset_handler - reset host (host bus adapter) - eh_strategy_handler - driver supplied alternate to scsi_unjam_host() info - supply information about given host ioctl - driver can respond to ioctls proc_info - supports /proc/scsi/{driver_name}/{host_no} @@ -970,24 +969,6 @@ Details: /** - * eh_strategy_handler - driver supplied alternate to scsi_unjam_host() - * @shp: host on which error has occurred - * - * Returns TRUE if host unjammed, else FALSE. - * - * Locks: none - * - * Calling context: kernel thread - * - * Notes: Invoked from scsi_eh thread. LLD supplied alternate to - * scsi_unjam_host() found in scsi_error.c - * - * Optionally defined in: LLD - **/ - int eh_strategy_handler(struct Scsi_Host * shp) - - -/** * info - supply information about given host: driver name plus data * to distinguish given host * @shp: host to supply information about |