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authorFrank Seidel <frank@f-seidel.de>2009-05-22 11:04:51 +0000
committerDavid S. Miller <davem@davemloft.net>2009-05-25 00:55:28 -0700
commit3dc403939c73ac372f2c95b5099dfdf396fe4ecc (patch)
tree471091981fd0626da8688bae677045598fcbc453 /drivers/isdn
parent5b277b8605f4c8fbd13302df33ab4570f844c1ff (diff)
downloadtalos-op-linux-3dc403939c73ac372f2c95b5099dfdf396fe4ecc.tar.gz
talos-op-linux-3dc403939c73ac372f2c95b5099dfdf396fe4ecc.zip
mISDN: Add allocation of recvbuf[1500] at run time to reduce stack size
Before: 1656 bytes on i386, now 164. Modified by Andreas Eversberg <andreas@eversberg.eu> Signed-off-by: Frank Seidel <frank@f-seidel.de> Signed-off-by: Andreas Eversberg <andreas@eversberg.eu> Signed-off-by: Karsten Keil <keil@b1-systems.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn')
-rw-r--r--drivers/isdn/mISDN/l1oip_core.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/isdn/mISDN/l1oip_core.c b/drivers/isdn/mISDN/l1oip_core.c
index abe574989572..ea3c3aa2004b 100644
--- a/drivers/isdn/mISDN/l1oip_core.c
+++ b/drivers/isdn/mISDN/l1oip_core.c
@@ -663,18 +663,28 @@ l1oip_socket_thread(void *data)
struct iovec iov;
mm_segment_t oldfs;
struct sockaddr_in sin_rx;
- unsigned char recvbuf[1500];
+ unsigned char *recvbuf;
+ size_t recvbuf_size = 1500;
int recvlen;
struct socket *socket = NULL;
DECLARE_COMPLETION(wait);
+ /* allocate buffer memory */
+ recvbuf = kmalloc(recvbuf_size, GFP_KERNEL);
+ if (!recvbuf) {
+ printk(KERN_ERR "%s: Failed to alloc recvbuf.\n", __func__);
+ ret = -ENOMEM;
+ goto fail;
+ }
+
/* make daemon */
allow_signal(SIGTERM);
/* create socket */
if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) {
printk(KERN_ERR "%s: Failed to create socket.\n", __func__);
- return -EIO;
+ ret = -EIO;
+ goto fail;
}
/* set incoming address */
@@ -730,10 +740,10 @@ l1oip_socket_thread(void *data)
__func__);
while (!signal_pending(current)) {
iov.iov_base = recvbuf;
- iov.iov_len = sizeof(recvbuf);
+ iov.iov_len = recvbuf_size;
oldfs = get_fs();
set_fs(KERNEL_DS);
- recvlen = sock_recvmsg(socket, &msg, sizeof(recvbuf), 0);
+ recvlen = sock_recvmsg(socket, &msg, recvbuf_size, 0);
set_fs(oldfs);
if (recvlen > 0) {
l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);
@@ -760,6 +770,9 @@ l1oip_socket_thread(void *data)
__func__);
fail:
+ /* free recvbuf */
+ kfree(recvbuf);
+
/* close socket */
if (socket)
sock_release(socket);
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