diff options
| author | Julia Lawall <julia@diku.dk> | 2008-03-04 15:25:11 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-04-24 21:16:39 -0700 |
| commit | dfa5ec79d28300b0d1fdeafbeebf0a6b721edc38 (patch) | |
| tree | bd379b8bd572186c9274e31e5c3ab3b829512106 /drivers | |
| parent | 3d71fe0bb29a3fbffdbe69dd0696927b6a23dd4e (diff) | |
USB: use DIV_ROUND_UP
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /
(d)) but is perhaps more readable.
An extract of the semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@haskernel@
@@
#include <linux/kernel.h>
@depends on haskernel@
expression n,d;
@@
(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
|
- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)
@depends on haskernel@
expression n,d;
@@
- DIV_ROUND_UP((n),d)
+ DIV_ROUND_UP(n,d)
@depends on haskernel@
expression n,d;
@@
- DIV_ROUND_UP(n,(d))
+ DIV_ROUND_UP(n,d)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/r8a66597-hcd.c | 6 | ||||
| -rw-r--r-- | drivers/usb/misc/usbtest.c | 2 | ||||
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 4 | ||||
| -rw-r--r-- | drivers/usb/serial/io_ti.c | 2 |
4 files changed, 7 insertions, 7 deletions
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c index 9f80e528557..afd4fbe7713 100644 --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -960,9 +960,9 @@ static void prepare_packet_read(struct r8a66597 *r8a66597, r8a66597_write(r8a66597, TRCLR, td->pipe->pipetre); r8a66597_write(r8a66597, - (urb->transfer_buffer_length - + td->maxpacket - 1) - / td->maxpacket, + DIV_ROUND_UP + (urb->transfer_buffer_length, + td->maxpacket), td->pipe->pipetrn); r8a66597_bset(r8a66597, TRENB, td->pipe->pipetre); diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index b6b5b2affad..17100471e46 100644 --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -1404,7 +1404,7 @@ static struct urb *iso_alloc_urb ( return NULL; maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize); maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11)); - packets = (bytes + maxp - 1) / maxp; + packets = DIV_ROUND_UP(bytes, maxp); urb = usb_alloc_urb (packets, GFP_KERNEL); if (!urb) diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 4643212eb95..496c0c93ad8 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1406,7 +1406,7 @@ static void ftdi_write_bulk_callback (struct urb *urb) data_offset = priv->write_offset; if (data_offset > 0) { /* Subtract the control bytes */ - countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ)); + countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ)); } spin_lock_irqsave(&priv->tx_lock, flags); --priv->tx_outstanding_urbs; @@ -1506,7 +1506,7 @@ static void ftdi_read_bulk_callback (struct urb *urb) /* count data bytes, but not status bytes */ countread = urb->actual_length; - countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ); + countread -= 2 * DIV_ROUND_UP(countread, PKTSZ); spin_lock_irqsave(&priv->rx_lock, flags); priv->rx_bytes += countread; spin_unlock_irqrestore(&priv->rx_lock, flags); diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index 39d71fdb507..6afee30a6a5 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -654,7 +654,7 @@ static void TIChasePort(struct edgeport_port *port, unsigned long timeout, int f /* (TIIsTxActive doesn't seem to wait for the last byte) */ if ((baud_rate=port->baud_rate) == 0) baud_rate = 50; - msleep(max(1,(10000+baud_rate-1)/baud_rate)); + msleep(max(1, DIV_ROUND_UP(10000, baud_rate))); } static int TIChooseConfiguration (struct usb_device *dev) |