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usb/storage: redefine US_BULK_FLAG_IN and use it

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US_BULK_FLAG_IN is defined as 1 and not used. The USB storage spec says
that bit 7 of flags within CBW defines the data direction. 1 is DATA-IN
(read from device) and 0 is the DATA-OUT. Bit 6 is obselete and bits 0-5
are reserved.
This patch redefines the unsued define US_BULK_FLAG_IN from 1 to 1 << 7
aka 0x80 and replaces the obvious users. In a following patch the
storage gadget will use it as well.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sebastian Andrzej Siewior 2012-02-25 18:28:10 +01:00 • committed by Greg Kroah-Hartman
parent 7ac4704c09
commit b8db6d6402
4 changed files with 18 additions and 17 deletions
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2
include/linux/usb/storage.h
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@ -62,7 +62,7 @@ struct bulk_cb_wrap {
#define US_BULK_CB_WRAP_LEN 31
#define US_BULK_CB_SIGN 0x43425355 /*spells out USBC */
#define US_BULK_FLAG_IN 1
#define US_BULK_FLAG_IN (1 << 7)
#define US_BULK_FLAG_OUT 0
/* command status wrapper */