From 33abc04f0420dceed0ebc2d1094019d3bb2b5c29 Mon Sep 17 00:00:00 2001 From: Doug Maxey Date: Wed, 5 Dec 2007 23:36:45 -0600 Subject: 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 Cc: Alan Stern Cc: Pete Zaitcev Signed-off-by: Doug Maxey Signed-off-by: Greg Kroah-Hartman --- include/linux/usb_usual.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/linux/usb_usual.h') 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 }; -- cgit v1.2.3-59-g8ed1b