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USB: make transfer_buffer_lengths in struct urb field u32

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Roel Kluin pointed out that transfer_buffer_lengths in struct urb was
declared as an 'int'.  This patch changes this field to be 'u32' to
prevent any potential negative conversion and comparison errors.

This triggered a few compiler warning messages when these fields were
being used with the min macro, so they have also been fixed up in this
patch.

Cc: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-03-03 16:44:13 -08:00
parent 7ea0a2bcfe
commit 16e2e5f634
6 changed files with 9 additions and 9 deletions
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2
drivers/usb/gadget/dummy_hcd.c
View File

@ -1437,7 +1437,7 @@ static void dummy_timer (unsigned long _dum)
}
if (urb->transfer_buffer_length > 1)
buf [1] = 0;
urb->actual_length = min (2,
urb->actual_length = min_t(u32, 2,
urb->transfer_buffer_length);
value = 0;
status = 0;

2
drivers/usb/host/isp116x-hcd.c
View File

@ -772,7 +772,7 @@ static int isp116x_urb_enqueue(struct usb_hcd *hcd,
break;
case PIPE_INTERRUPT:
urb->interval = ep->period;
ep->length = min((int)ep->maxpacket,
ep->length = min_t(u32, ep->maxpacket,
urb->transfer_buffer_length);
/* urb submitted for already existing endpoint */

2
drivers/usb/host/r8a66597-hcd.c
View File

@ -1394,7 +1394,7 @@ static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
(int)urb->iso_frame_desc[td->iso_cnt].length);
} else {
buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
size = min((int)bufsize,
size = min_t(u32, bufsize,
urb->transfer_buffer_length - urb->actual_length);
}

4
drivers/usb/host/sl811-hcd.c
View File

@ -230,7 +230,7 @@ static void in_packet(
writeb(usb_pipedevice(urb->pipe), data_reg);
sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
ep->length = min((int)len,
ep->length = min_t(u32, len,
urb->transfer_buffer_length - urb->actual_length);
PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
!!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
@ -255,7 +255,7 @@ static void out_packet(
buf = urb->transfer_buffer + urb->actual_length;
prefetch(buf);
len = min((int)ep->maxpacket,
len = min_t(u32, ep->maxpacket,
urb->transfer_buffer_length - urb->actual_length);
if (!(control & SL11H_HCTLMASK_ISOCH)

6
drivers/usb/misc/ftdi-elan.c
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@ -1568,7 +1568,7 @@ static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
struct u132_target *target = &ftdi->target[ed];
struct u132_command *command = &ftdi->command[
COMMAND_MASK & ftdi->command_next];
int remaining_length = urb->transfer_buffer_length -
u32 remaining_length = urb->transfer_buffer_length -
urb->actual_length;
command->header = 0x82 | (ed << 5);
if (remaining_length == 0) {
@ -1702,7 +1702,7 @@ static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
| (address << 0);
command->width = usb_maxpacket(urb->dev, urb->pipe,
usb_pipeout(urb->pipe));
command->follows = min(1024,
command->follows = min_t(u32, 1024,
urb->transfer_buffer_length -
urb->actual_length);
command->value = 0;
@ -1766,7 +1766,7 @@ static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
mutex_lock(&ftdi->u132_lock);
command_size = ftdi->command_next - ftdi->command_head;
if (command_size < COMMAND_SIZE) {
int remaining_length = urb->transfer_buffer_length -
u32 remaining_length = urb->transfer_buffer_length -
urb->actual_length;
struct u132_target *target = &ftdi->target[ed];
struct u132_command *command = &ftdi->command[

2
include/linux/usb.h
View File

@ -1177,7 +1177,7 @@ struct urb {
unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/
void *transfer_buffer; /* (in) associated data buffer */
dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */
int transfer_buffer_length; /* (in) data buffer length */
u32 transfer_buffer_length; /* (in) data buffer length */
int actual_length; /* (return) actual transfer length */
unsigned char *setup_packet; /* (in) setup packet (control only) */
dma_addr_t setup_dma; /* (in) dma addr for setup_packet */