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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2012-02-25 21:28:10 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-02-28 23:07:42 +0400
commitb8db6d6402ddca1c78a27407fbd10a6ccb23ab14 (patch)
tree4e9dfe7724cb2332f083f4dd0a3a4b5576c0e28a /drivers/usb/storage/transport.c
parent7ac4704c099125214a4f0a4bd54ce94d15be2ffb (diff)
downloadlinux-b8db6d6402ddca1c78a27407fbd10a6ccb23ab14.tar.xz
usb/storage: redefine US_BULK_FLAG_IN and use it
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>
Diffstat (limited to 'drivers/usb/storage/transport.c')
-rw-r--r--drivers/usb/storage/transport.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index 0e5c91c6187f..c70109e5d60b 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -1071,7 +1071,8 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
/* set up the command wrapper */
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->DataTransferLength = cpu_to_le32(transfer_length);
- bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0;
+ bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ?
+ US_BULK_FLAG_IN : 0;
bcb->Tag = ++us->tag;
bcb->Lun = srb->device->lun;
if (us->fflags & US_FL_SCM_MULT_TARG)