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| author | Alan Stern <stern@rowland.harvard.edu> | 2005-10-24 04:40:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-10-29 01:47:50 +0200 |
| commit | bbafa4668f37f5093a3ae2a8b0cbe327e24e12da (patch) | |
| tree | e679db87309810e8da8092ffcb3df5a9dd7323e0 /drivers/usb/storage/transport.c | |
| parent | [PATCH] PATCH: usb-storage: move GetMaxLUN later in time (diff) | |
| download | linux-bbafa4668f37f5093a3ae2a8b0cbe327e24e12da.tar.xz linux-bbafa4668f37f5093a3ae2a8b0cbe327e24e12da.zip | |
[PATCH] PATCH: usb-storage: allocate separate sense buffer
This patch is from Alan Stern (as560). It has been rediffed against a
current tree.
This patch allocates a separate buffer for usb-storage to use when
auto-sensing. Up to now we have been using the sense buffer embedded in a
scsi_cmnd struct, which is dangerous on hosts that (a) don't do
cache-coherent DMA or (b) have DMA alignment restrictions.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/storage/transport.c')
| -rw-r--r-- | drivers/usb/storage/transport.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index e89e945fc4a7..7ca896a342e3 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -636,11 +636,11 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) /* use the new buffer we have */ old_request_buffer = srb->request_buffer; - srb->request_buffer = srb->sense_buffer; + srb->request_buffer = us->sensebuf; /* set the buffer length for transfer */ old_request_bufflen = srb->request_bufflen; - srb->request_bufflen = 18; + srb->request_bufflen = US_SENSE_SIZE; /* set up for no scatter-gather use */ old_sg = srb->use_sg; @@ -652,6 +652,7 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) temp_result = us->transport(us->srb, us); /* let's clean up right away */ + memcpy(srb->sense_buffer, us->sensebuf, US_SENSE_SIZE); srb->resid = old_resid; srb->request_buffer = old_request_buffer; srb->request_bufflen = old_request_bufflen; |