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Commit 3dc40393 authored by Frank Seidel's avatar Frank Seidel Committed by David S. Miller
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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: default avatarFrank Seidel <frank@f-seidel.de>
Signed-off-by: default avatarAndreas Eversberg <andreas@eversberg.eu>
Signed-off-by: default avatarKarsten Keil <keil@b1-systems.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5b277b86

drivers/isdn/mISDN/l1oip_core.c

+17 −4
Original line number Diff line number Diff line
@@ -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);