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Revision 85a00d9bbfb4704fbf368944b1cb9fed8f1598c5 authored by Peter Jones on 22 September 2010, 20:05:04 UTC, committed by Linus Torvalds on 23 September 2010, 00:22:39 UTC 
efifb: check that the base address is plausible on pci systems
 
Some Apple machines have identical DMI data but different memory
configurations for the video.  Given that, check that the address in our
table is actually within the range of a PCI BAR on a VGA device in the
machine.

This also fixes up the return value from set_system(), which has always
been wrong, but never resulted in bad behavior since there's only ever
been one matching entry in the dmi table.

The patch

1) stops people's machines from crashing when we get their display wrong,
   which seems to be unfortunately inevitable,

2) allows us to support identical dmi data with differing video memory
   configurations

This also adds me as the efifb maintainer, since I've effectively been
acting as such for quite some time.

Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent a0c42ba
Raw File
krng.c 
/*
 * RNG implementation using standard kernel RNG.
 *
 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * any later version.
 *
 */

#include <crypto/internal/rng.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/random.h>

static int krng_get_random(struct crypto_rng *tfm, u8 *rdata, unsigned int dlen)
{
	get_random_bytes(rdata, dlen);
	return 0;
}

static int krng_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen)
{
	return 0;
}

static struct crypto_alg krng_alg = {
	.cra_name		= "stdrng",
	.cra_driver_name	= "krng",
	.cra_priority		= 200,
	.cra_flags		= CRYPTO_ALG_TYPE_RNG,
	.cra_ctxsize		= 0,
	.cra_type		= &crypto_rng_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(krng_alg.cra_list),
	.cra_u			= {
		.rng = {
			.rng_make_random	= krng_get_random,
			.rng_reset		= krng_reset,
			.seedsize		= 0,
		}
	}
};


/* Module initalization */
static int __init krng_mod_init(void)
{
	return crypto_register_alg(&krng_alg);
}

static void __exit krng_mod_fini(void)
{
	crypto_unregister_alg(&krng_alg);
	return;
}

module_init(krng_mod_init);
module_exit(krng_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Kernel Random Number Generator");
MODULE_ALIAS("stdrng");
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