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linux/sound/pci/ctxfi/ctsrc.c
Takashi Iwai 25aa8e9f10 ALSA: ctxfi: Fix out-of-range access 
commit 76c4718322 upstream.

The master and next_conj of rcs_ops are used for iterating the
resource list entries, and currently those are supposed to return the
current value.  The problem is that next_conf may go over the last
entry before the loop abort condition is evaluated, and it may return
the "current" value that is beyond the array size.  It was caught
recently as a GPF, for example.

Those return values are, however, never actually evaluated, hence
basically we don't have to consider the current value as the return at
all.  By dropping those return values, the potential out-of-range
access above is also fixed automatically.

This patch changes the return type of master and next_conj callbacks
to void and drop the superfluous code accordingly.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214985
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211118215729.26257-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-01 09:04:40 +01:00

883 lines
19 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
*
* @File ctsrc.c
*
* @Brief
* This file contains the implementation of the Sample Rate Convertor
* resource management object.
*
* @Author Liu Chun
* @Date May 13 2008
*/
#include "ctsrc.h"
#include "cthardware.h"
#include <linux/slab.h>
#define SRC_RESOURCE_NUM 256
#define SRCIMP_RESOURCE_NUM 256
static unsigned int conj_mask;
static int src_default_config_memrd(struct src *src);
static int src_default_config_memwr(struct src *src);
static int src_default_config_arcrw(struct src *src);
static int (*src_default_config[3])(struct src *) = {
[MEMRD] = src_default_config_memrd,
[MEMWR] = src_default_config_memwr,
[ARCRW] = src_default_config_arcrw
};
static int src_set_state(struct src *src, unsigned int state)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_state(src->rsc.ctrl_blk, state);
return 0;
}
static int src_set_bm(struct src *src, unsigned int bm)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_bm(src->rsc.ctrl_blk, bm);
return 0;
}
static int src_set_sf(struct src *src, unsigned int sf)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_sf(src->rsc.ctrl_blk, sf);
return 0;
}
static int src_set_pm(struct src *src, unsigned int pm)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_pm(src->rsc.ctrl_blk, pm);
return 0;
}
static int src_set_rom(struct src *src, unsigned int rom)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_rom(src->rsc.ctrl_blk, rom);
return 0;
}
static int src_set_vo(struct src *src, unsigned int vo)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_vo(src->rsc.ctrl_blk, vo);
return 0;
}
static int src_set_st(struct src *src, unsigned int st)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_st(src->rsc.ctrl_blk, st);
return 0;
}
static int src_set_bp(struct src *src, unsigned int bp)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_bp(src->rsc.ctrl_blk, bp);
return 0;
}
static int src_set_cisz(struct src *src, unsigned int cisz)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_cisz(src->rsc.ctrl_blk, cisz);
return 0;
}
static int src_set_ca(struct src *src, unsigned int ca)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_ca(src->rsc.ctrl_blk, ca);
return 0;
}
static int src_set_sa(struct src *src, unsigned int sa)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_sa(src->rsc.ctrl_blk, sa);
return 0;
}
static int src_set_la(struct src *src, unsigned int la)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_la(src->rsc.ctrl_blk, la);
return 0;
}
static int src_set_pitch(struct src *src, unsigned int pitch)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_pitch(src->rsc.ctrl_blk, pitch);
return 0;
}
static int src_set_clear_zbufs(struct src *src)
{
struct hw *hw;
hw = src->rsc.hw;
hw->src_set_clear_zbufs(src->rsc.ctrl_blk, 1);
return 0;
}
static int src_commit_write(struct src *src)
{
struct hw *hw;
int i;
unsigned int dirty = 0;
hw = src->rsc.hw;
src->rsc.ops->master(&src->rsc);
if (src->rsc.msr > 1) {
/* Save dirty flags for conjugate resource programming */
dirty = hw->src_get_dirty(src->rsc.ctrl_blk) & conj_mask;
}
hw->src_commit_write(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
/* Program conjugate parameter mixer resources */
if (MEMWR == src->mode)
return 0;
for (i = 1; i < src->rsc.msr; i++) {
src->rsc.ops->next_conj(&src->rsc);
hw->src_set_dirty(src->rsc.ctrl_blk, dirty);
hw->src_commit_write(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
}
src->rsc.ops->master(&src->rsc);
return 0;
}
static int src_get_ca(struct src *src)
{
struct hw *hw;
hw = src->rsc.hw;
return hw->src_get_ca(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
}
static int src_init(struct src *src)
{
src_default_config[src->mode](src);
return 0;
}
static struct src *src_next_interleave(struct src *src)
{
return src->intlv;
}
static int src_default_config_memrd(struct src *src)
{
struct hw *hw = src->rsc.hw;
unsigned int rsr, msr;
hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
hw->src_set_bm(src->rsc.ctrl_blk, 1);
for (rsr = 0, msr = src->rsc.msr; msr > 1; msr >>= 1)
rsr++;
hw->src_set_rsr(src->rsc.ctrl_blk, rsr);
hw->src_set_sf(src->rsc.ctrl_blk, SRC_SF_S16);
hw->src_set_wr(src->rsc.ctrl_blk, 0);
hw->src_set_pm(src->rsc.ctrl_blk, 0);
hw->src_set_rom(src->rsc.ctrl_blk, 0);
hw->src_set_vo(src->rsc.ctrl_blk, 0);
hw->src_set_st(src->rsc.ctrl_blk, 0);
hw->src_set_ilsz(src->rsc.ctrl_blk, src->multi - 1);
hw->src_set_cisz(src->rsc.ctrl_blk, 0x80);
hw->src_set_sa(src->rsc.ctrl_blk, 0x0);
hw->src_set_la(src->rsc.ctrl_blk, 0x1000);
hw->src_set_ca(src->rsc.ctrl_blk, 0x80);
hw->src_set_pitch(src->rsc.ctrl_blk, 0x1000000);
hw->src_set_clear_zbufs(src->rsc.ctrl_blk, 1);
src->rsc.ops->master(&src->rsc);
hw->src_commit_write(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
for (msr = 1; msr < src->rsc.msr; msr++) {
src->rsc.ops->next_conj(&src->rsc);
hw->src_set_pitch(src->rsc.ctrl_blk, 0x1000000);
hw->src_commit_write(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
}
src->rsc.ops->master(&src->rsc);
return 0;
}
static int src_default_config_memwr(struct src *src)
{
struct hw *hw = src->rsc.hw;
hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
hw->src_set_bm(src->rsc.ctrl_blk, 1);
hw->src_set_rsr(src->rsc.ctrl_blk, 0);
hw->src_set_sf(src->rsc.ctrl_blk, SRC_SF_S16);
hw->src_set_wr(src->rsc.ctrl_blk, 1);
hw->src_set_pm(src->rsc.ctrl_blk, 0);
hw->src_set_rom(src->rsc.ctrl_blk, 0);
hw->src_set_vo(src->rsc.ctrl_blk, 0);
hw->src_set_st(src->rsc.ctrl_blk, 0);
hw->src_set_ilsz(src->rsc.ctrl_blk, 0);
hw->src_set_cisz(src->rsc.ctrl_blk, 0x80);
hw->src_set_sa(src->rsc.ctrl_blk, 0x0);
hw->src_set_la(src->rsc.ctrl_blk, 0x1000);
hw->src_set_ca(src->rsc.ctrl_blk, 0x80);
hw->src_set_pitch(src->rsc.ctrl_blk, 0x1000000);
hw->src_set_clear_zbufs(src->rsc.ctrl_blk, 1);
src->rsc.ops->master(&src->rsc);
hw->src_commit_write(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
return 0;
}
static int src_default_config_arcrw(struct src *src)
{
struct hw *hw = src->rsc.hw;
unsigned int rsr, msr;
unsigned int dirty;
hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
hw->src_set_bm(src->rsc.ctrl_blk, 0);
for (rsr = 0, msr = src->rsc.msr; msr > 1; msr >>= 1)
rsr++;
hw->src_set_rsr(src->rsc.ctrl_blk, rsr);
hw->src_set_sf(src->rsc.ctrl_blk, SRC_SF_F32);
hw->src_set_wr(src->rsc.ctrl_blk, 0);
hw->src_set_pm(src->rsc.ctrl_blk, 0);
hw->src_set_rom(src->rsc.ctrl_blk, 0);
hw->src_set_vo(src->rsc.ctrl_blk, 0);
hw->src_set_st(src->rsc.ctrl_blk, 0);
hw->src_set_ilsz(src->rsc.ctrl_blk, 0);
hw->src_set_cisz(src->rsc.ctrl_blk, 0x80);
hw->src_set_sa(src->rsc.ctrl_blk, 0x0);
/*hw->src_set_sa(src->rsc.ctrl_blk, 0x100);*/
hw->src_set_la(src->rsc.ctrl_blk, 0x1000);
/*hw->src_set_la(src->rsc.ctrl_blk, 0x03ffffe0);*/
hw->src_set_ca(src->rsc.ctrl_blk, 0x80);
hw->src_set_pitch(src->rsc.ctrl_blk, 0x1000000);
hw->src_set_clear_zbufs(src->rsc.ctrl_blk, 1);
dirty = hw->src_get_dirty(src->rsc.ctrl_blk);
src->rsc.ops->master(&src->rsc);
for (msr = 0; msr < src->rsc.msr; msr++) {
hw->src_set_dirty(src->rsc.ctrl_blk, dirty);
hw->src_commit_write(hw, src->rsc.ops->index(&src->rsc),
src->rsc.ctrl_blk);
src->rsc.ops->next_conj(&src->rsc);
}
src->rsc.ops->master(&src->rsc);
return 0;
}
static const struct src_rsc_ops src_rsc_ops = {
.set_state = src_set_state,
.set_bm = src_set_bm,
.set_sf = src_set_sf,
.set_pm = src_set_pm,
.set_rom = src_set_rom,
.set_vo = src_set_vo,
.set_st = src_set_st,
.set_bp = src_set_bp,
.set_cisz = src_set_cisz,
.set_ca = src_set_ca,
.set_sa = src_set_sa,
.set_la = src_set_la,
.set_pitch = src_set_pitch,
.set_clr_zbufs = src_set_clear_zbufs,
.commit_write = src_commit_write,
.get_ca = src_get_ca,
.init = src_init,
.next_interleave = src_next_interleave,
};
static int
src_rsc_init(struct src *src, u32 idx,
const struct src_desc *desc, struct src_mgr *mgr)
{
int err;
int i, n;
struct src *p;
n = (MEMRD == desc->mode) ? desc->multi : 1;
for (i = 0, p = src; i < n; i++, p++) {
err = rsc_init(&p->rsc, idx + i, SRC, desc->msr, mgr->mgr.hw);
if (err)
goto error1;
/* Initialize src specific rsc operations */
p->ops = &src_rsc_ops;
p->multi = (0 == i) ? desc->multi : 1;
p->mode = desc->mode;
src_default_config[desc->mode](p);
mgr->src_enable(mgr, p);
p->intlv = p + 1;
}
(--p)->intlv = NULL; /* Set @intlv of the last SRC to NULL */
mgr->commit_write(mgr);
return 0;
error1:
for (i--, p--; i >= 0; i--, p--) {
mgr->src_disable(mgr, p);
rsc_uninit(&p->rsc);
}
mgr->commit_write(mgr);
return err;
}
static int src_rsc_uninit(struct src *src, struct src_mgr *mgr)
{
int i, n;
struct src *p;
n = (MEMRD == src->mode) ? src->multi : 1;
for (i = 0, p = src; i < n; i++, p++) {
mgr->src_disable(mgr, p);
rsc_uninit(&p->rsc);
p->multi = 0;
p->ops = NULL;
p->mode = NUM_SRCMODES;
p->intlv = NULL;
}
mgr->commit_write(mgr);
return 0;
}
static int
get_src_rsc(struct src_mgr *mgr, const struct src_desc *desc, struct src **rsrc)
{
unsigned int idx = SRC_RESOURCE_NUM;
int err;
struct src *src;
unsigned long flags;
*rsrc = NULL;
/* Check whether there are sufficient src resources to meet request. */
spin_lock_irqsave(&mgr->mgr_lock, flags);
if (MEMRD == desc->mode)
err = mgr_get_resource(&mgr->mgr, desc->multi, &idx);
else
err = mgr_get_resource(&mgr->mgr, 1, &idx);
spin_unlock_irqrestore(&mgr->mgr_lock, flags);
if (err) {
dev_err(mgr->card->dev,
"Can't meet SRC resource request!\n");
return err;
}
/* Allocate mem for master src resource */
if (MEMRD == desc->mode)
src = kcalloc(desc->multi, sizeof(*src), GFP_KERNEL);
else
src = kzalloc(sizeof(*src), GFP_KERNEL);
if (!src) {
err = -ENOMEM;
goto error1;
}
err = src_rsc_init(src, idx, desc, mgr);
if (err)
goto error2;
*rsrc = src;
return 0;
error2:
kfree(src);
error1:
spin_lock_irqsave(&mgr->mgr_lock, flags);
if (MEMRD == desc->mode)
mgr_put_resource(&mgr->mgr, desc->multi, idx);
else
mgr_put_resource(&mgr->mgr, 1, idx);
spin_unlock_irqrestore(&mgr->mgr_lock, flags);
return err;
}
static int put_src_rsc(struct src_mgr *mgr, struct src *src)
{
unsigned long flags;
spin_lock_irqsave(&mgr->mgr_lock, flags);
src->rsc.ops->master(&src->rsc);
if (MEMRD == src->mode)
mgr_put_resource(&mgr->mgr, src->multi,
src->rsc.ops->index(&src->rsc));
else
mgr_put_resource(&mgr->mgr, 1, src->rsc.ops->index(&src->rsc));
spin_unlock_irqrestore(&mgr->mgr_lock, flags);
src_rsc_uninit(src, mgr);
kfree(src);
return 0;
}
static int src_enable_s(struct src_mgr *mgr, struct src *src)
{
struct hw *hw = mgr->mgr.hw;
int i;
src->rsc.ops->master(&src->rsc);
for (i = 0; i < src->rsc.msr; i++) {
hw->src_mgr_enbs_src(mgr->mgr.ctrl_blk,
src->rsc.ops->index(&src->rsc));
src->rsc.ops->next_conj(&src->rsc);
}
src->rsc.ops->master(&src->rsc);
return 0;
}
static int src_enable(struct src_mgr *mgr, struct src *src)
{
struct hw *hw = mgr->mgr.hw;
int i;
src->rsc.ops->master(&src->rsc);
for (i = 0; i < src->rsc.msr; i++) {
hw->src_mgr_enb_src(mgr->mgr.ctrl_blk,
src->rsc.ops->index(&src->rsc));
src->rsc.ops->next_conj(&src->rsc);
}
src->rsc.ops->master(&src->rsc);
return 0;
}
static int src_disable(struct src_mgr *mgr, struct src *src)
{
struct hw *hw = mgr->mgr.hw;
int i;
src->rsc.ops->master(&src->rsc);
for (i = 0; i < src->rsc.msr; i++) {
hw->src_mgr_dsb_src(mgr->mgr.ctrl_blk,
src->rsc.ops->index(&src->rsc));
src->rsc.ops->next_conj(&src->rsc);
}
src->rsc.ops->master(&src->rsc);
return 0;
}
static int src_mgr_commit_write(struct src_mgr *mgr)
{
struct hw *hw = mgr->mgr.hw;
hw->src_mgr_commit_write(hw, mgr->mgr.ctrl_blk);
return 0;
}
int src_mgr_create(struct hw *hw, struct src_mgr **rsrc_mgr)
{
int err, i;
struct src_mgr *src_mgr;
*rsrc_mgr = NULL;
src_mgr = kzalloc(sizeof(*src_mgr), GFP_KERNEL);
if (!src_mgr)
return -ENOMEM;
err = rsc_mgr_init(&src_mgr->mgr, SRC, SRC_RESOURCE_NUM, hw);
if (err)
goto error1;
spin_lock_init(&src_mgr->mgr_lock);
conj_mask = hw->src_dirty_conj_mask();
src_mgr->get_src = get_src_rsc;
src_mgr->put_src = put_src_rsc;
src_mgr->src_enable_s = src_enable_s;
src_mgr->src_enable = src_enable;
src_mgr->src_disable = src_disable;
src_mgr->commit_write = src_mgr_commit_write;
src_mgr->card = hw->card;
/* Disable all SRC resources. */
for (i = 0; i < 256; i++)
hw->src_mgr_dsb_src(src_mgr->mgr.ctrl_blk, i);
hw->src_mgr_commit_write(hw, src_mgr->mgr.ctrl_blk);
*rsrc_mgr = src_mgr;
return 0;
error1:
kfree(src_mgr);
return err;
}
int src_mgr_destroy(struct src_mgr *src_mgr)
{
rsc_mgr_uninit(&src_mgr->mgr);
kfree(src_mgr);
return 0;
}
/* SRCIMP resource manager operations */
static void srcimp_master(struct rsc *rsc)
{
rsc->conj = 0;
rsc->idx = container_of(rsc, struct srcimp, rsc)->idx[0];
}
static void srcimp_next_conj(struct rsc *rsc)
{
rsc->conj++;
}
static int srcimp_index(const struct rsc *rsc)
{
return container_of(rsc, struct srcimp, rsc)->idx[rsc->conj];
}
static const struct rsc_ops srcimp_basic_rsc_ops = {
.master = srcimp_master,
.next_conj = srcimp_next_conj,
.index = srcimp_index,
.output_slot = NULL,
};
static int srcimp_map(struct srcimp *srcimp, struct src *src, struct rsc *input)
{
struct imapper *entry;
int i;
srcimp->rsc.ops->master(&srcimp->rsc);
src->rsc.ops->master(&src->rsc);
input->ops->master(input);
/* Program master and conjugate resources */
for (i = 0; i < srcimp->rsc.msr; i++) {
entry = &srcimp->imappers[i];
entry->slot = input->ops->output_slot(input);
entry->user = src->rsc.ops->index(&src->rsc);
entry->addr = srcimp->rsc.ops->index(&srcimp->rsc);
srcimp->mgr->imap_add(srcimp->mgr, entry);
srcimp->mapped |= (0x1 << i);
srcimp->rsc.ops->next_conj(&srcimp->rsc);
input->ops->next_conj(input);
}
srcimp->rsc.ops->master(&srcimp->rsc);
input->ops->master(input);
return 0;
}
static int srcimp_unmap(struct srcimp *srcimp)
{
int i;
/* Program master and conjugate resources */
for (i = 0; i < srcimp->rsc.msr; i++) {
if (srcimp->mapped & (0x1 << i)) {
srcimp->mgr->imap_delete(srcimp->mgr,
&srcimp->imappers[i]);
srcimp->mapped &= ~(0x1 << i);
}
}
return 0;
}
static const struct srcimp_rsc_ops srcimp_ops = {
.map = srcimp_map,
.unmap = srcimp_unmap
};
static int srcimp_rsc_init(struct srcimp *srcimp,
const struct srcimp_desc *desc,
struct srcimp_mgr *mgr)
{
int err;
err = rsc_init(&srcimp->rsc, srcimp->idx[0],
SRCIMP, desc->msr, mgr->mgr.hw);
if (err)
return err;
/* Reserve memory for imapper nodes */
srcimp->imappers = kcalloc(desc->msr, sizeof(struct imapper),
GFP_KERNEL);
if (!srcimp->imappers) {
err = -ENOMEM;
goto error1;
}
/* Set srcimp specific operations */
srcimp->rsc.ops = &srcimp_basic_rsc_ops;
srcimp->ops = &srcimp_ops;
srcimp->mgr = mgr;
srcimp->rsc.ops->master(&srcimp->rsc);
return 0;
error1:
rsc_uninit(&srcimp->rsc);
return err;
}
static int srcimp_rsc_uninit(struct srcimp *srcimp)
{
kfree(srcimp->imappers);
srcimp->imappers = NULL;
srcimp->ops = NULL;
srcimp->mgr = NULL;
rsc_uninit(&srcimp->rsc);
return 0;
}
static int get_srcimp_rsc(struct srcimp_mgr *mgr,
const struct srcimp_desc *desc,
struct srcimp **rsrcimp)
{
int err, i;
unsigned int idx;
struct srcimp *srcimp;
unsigned long flags;
*rsrcimp = NULL;
/* Allocate mem for SRCIMP resource */
srcimp = kzalloc(sizeof(*srcimp), GFP_KERNEL);
if (!srcimp)
return -ENOMEM;
/* Check whether there are sufficient SRCIMP resources. */
err = 0;
spin_lock_irqsave(&mgr->mgr_lock, flags);
for (i = 0; i < desc->msr; i++) {
err = mgr_get_resource(&mgr->mgr, 1, &idx);
if (err)
break;
srcimp->idx[i] = idx;
}
spin_unlock_irqrestore(&mgr->mgr_lock, flags);
if (err) {
dev_err(mgr->card->dev,
"Can't meet SRCIMP resource request!\n");
goto error1;
}
err = srcimp_rsc_init(srcimp, desc, mgr);
if (err)
goto error1;
*rsrcimp = srcimp;
return 0;
error1:
spin_lock_irqsave(&mgr->mgr_lock, flags);
for (i--; i >= 0; i--)
mgr_put_resource(&mgr->mgr, 1, srcimp->idx[i]);
spin_unlock_irqrestore(&mgr->mgr_lock, flags);
kfree(srcimp);
return err;
}
static int put_srcimp_rsc(struct srcimp_mgr *mgr, struct srcimp *srcimp)
{
unsigned long flags;
int i;
spin_lock_irqsave(&mgr->mgr_lock, flags);
for (i = 0; i < srcimp->rsc.msr; i++)
mgr_put_resource(&mgr->mgr, 1, srcimp->idx[i]);
spin_unlock_irqrestore(&mgr->mgr_lock, flags);
srcimp_rsc_uninit(srcimp);
kfree(srcimp);
return 0;
}
static int srcimp_map_op(void *data, struct imapper *entry)
{
struct rsc_mgr *mgr = &((struct srcimp_mgr *)data)->mgr;
struct hw *hw = mgr->hw;
hw->srcimp_mgr_set_imaparc(mgr->ctrl_blk, entry->slot);
hw->srcimp_mgr_set_imapuser(mgr->ctrl_blk, entry->user);
hw->srcimp_mgr_set_imapnxt(mgr->ctrl_blk, entry->next);
hw->srcimp_mgr_set_imapaddr(mgr->ctrl_blk, entry->addr);
hw->srcimp_mgr_commit_write(mgr->hw, mgr->ctrl_blk);
return 0;
}
static int srcimp_imap_add(struct srcimp_mgr *mgr, struct imapper *entry)
{
unsigned long flags;
int err;
spin_lock_irqsave(&mgr->imap_lock, flags);
if ((0 == entry->addr) && (mgr->init_imap_added)) {
input_mapper_delete(&mgr->imappers,
mgr->init_imap, srcimp_map_op, mgr);
mgr->init_imap_added = 0;
}
err = input_mapper_add(&mgr->imappers, entry, srcimp_map_op, mgr);
spin_unlock_irqrestore(&mgr->imap_lock, flags);
return err;
}
static int srcimp_imap_delete(struct srcimp_mgr *mgr, struct imapper *entry)
{
unsigned long flags;
int err;
spin_lock_irqsave(&mgr->imap_lock, flags);
err = input_mapper_delete(&mgr->imappers, entry, srcimp_map_op, mgr);
if (list_empty(&mgr->imappers)) {
input_mapper_add(&mgr->imappers, mgr->init_imap,
srcimp_map_op, mgr);
mgr->init_imap_added = 1;
}
spin_unlock_irqrestore(&mgr->imap_lock, flags);
return err;
}
int srcimp_mgr_create(struct hw *hw, struct srcimp_mgr **rsrcimp_mgr)
{
int err;
struct srcimp_mgr *srcimp_mgr;
struct imapper *entry;
*rsrcimp_mgr = NULL;
srcimp_mgr = kzalloc(sizeof(*srcimp_mgr), GFP_KERNEL);
if (!srcimp_mgr)
return -ENOMEM;
err = rsc_mgr_init(&srcimp_mgr->mgr, SRCIMP, SRCIMP_RESOURCE_NUM, hw);
if (err)
goto error1;
spin_lock_init(&srcimp_mgr->mgr_lock);
spin_lock_init(&srcimp_mgr->imap_lock);
INIT_LIST_HEAD(&srcimp_mgr->imappers);
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) {
err = -ENOMEM;
goto error2;
}
entry->slot = entry->addr = entry->next = entry->user = 0;
list_add(&entry->list, &srcimp_mgr->imappers);
srcimp_mgr->init_imap = entry;
srcimp_mgr->init_imap_added = 1;
srcimp_mgr->get_srcimp = get_srcimp_rsc;
srcimp_mgr->put_srcimp = put_srcimp_rsc;
srcimp_mgr->imap_add = srcimp_imap_add;
srcimp_mgr->imap_delete = srcimp_imap_delete;
srcimp_mgr->card = hw->card;
*rsrcimp_mgr = srcimp_mgr;
return 0;
error2:
rsc_mgr_uninit(&srcimp_mgr->mgr);
error1:
kfree(srcimp_mgr);
return err;
}
int srcimp_mgr_destroy(struct srcimp_mgr *srcimp_mgr)
{
unsigned long flags;
/* free src input mapper list */
spin_lock_irqsave(&srcimp_mgr->imap_lock, flags);
free_input_mapper_list(&srcimp_mgr->imappers);
spin_unlock_irqrestore(&srcimp_mgr->imap_lock, flags);
rsc_mgr_uninit(&srcimp_mgr->mgr);
kfree(srcimp_mgr);
return 0;
}
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