Commit dfa5ec79 authored by Julia Lawall's avatar Julia Lawall Committed by Greg Kroah-Hartman
Browse files

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: default avatarJulia Lawall <julia@diku.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 3d71fe0b
......@@ -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);
......
......@@ -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)
......
......@@ -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);
......
......@@ -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)
......
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