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authorJulia Lawall <julia@diku.dk>2008-03-04 15:25:11 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2008-04-24 21:16:39 -0700
commitdfa5ec79d28300b0d1fdeafbeebf0a6b721edc38 (patch)
treebd379b8bd572186c9274e31e5c3ab3b829512106
parent3d71fe0bb29a3fbffdbe69dd0696927b6a23dd4e (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>
-rw-r--r--drivers/usb/host/r8a66597-hcd.c6
-rw-r--r--drivers/usb/misc/usbtest.c2
-rw-r--r--drivers/usb/serial/ftdi_sio.c4
-rw-r--r--drivers/usb/serial/io_ti.c2
4 files changed, 7 insertions, 7 deletions
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 9f80e52..afd4fbe 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 b6b5b2a..1710047 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 4643212..496c0c9 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 39d71fd..6afee30 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)