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| author | Doug Maxey <dwm@enoyolf.org> | 2007-12-05 23:36:45 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-12-17 10:47:14 -0800 |
| commit | 33abc04f0420dceed0ebc2d1094019d3bb2b5c29 (patch) | |
| tree | 87d8e2c7cf41d6afed4d75c2e3ef113b506541ab /include/linux/usb_usual.h | |
| parent | b9e13ac30f850313be9232497ff98e90c43bc6b6 (diff) | |
| download | blackbird-op-linux-33abc04f0420dceed0ebc2d1094019d3bb2b5c29.tar.gz blackbird-op-linux-33abc04f0420dceed0ebc2d1094019d3bb2b5c29.zip | |
usb-storage: Fix devices that cannot handle 32k transfers
When a device cannot handle the smallest previously limited transfer
size (64 blocks) without stalling, limit the device to the amount of
packets that fit in a platform native page.
The lowest possible limit is PAGE_CACHE_SIZE, so if the device is ever
used on a platform that has larger than 8K pages, you lose unless you
can convince the device firmware folks to fix the issue.
Cc: Mathew Dharm <mdharm-scsi@one-eyed-alien.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Doug Maxey <dwm@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/usb_usual.h')
| -rw-r--r-- | include/linux/usb_usual.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h index 1b792b9286ba..a417b09b8b3d 100644 --- a/include/linux/usb_usual.h +++ b/include/linux/usb_usual.h @@ -48,7 +48,10 @@ US_FLAG(IGNORE_DEVICE, 0x00000800) \ /* Don't claim device */ \ US_FLAG(CAPACITY_HEURISTICS, 0x00001000) \ - /* sometimes sizes is too big */ + /* sometimes sizes is too big */ \ + US_FLAG(MAX_SECTORS_MIN,0x00002000) \ + /* Sets max_sectors to arch min */ + #define US_FLAG(name, value) US_FL_##name = value , enum { US_DO_ALL_FLAGS }; |
