/*
* Copyright (C) ST-Ericsson AB 2010
* Author: Sjur Brendeland
* License terms: GNU General Public License (GPL) version 2
*/
#ifndef CFCTRL_H_
#define CFCTRL_H_
#include <net/caif/caif_layer.h>
#include <net/caif/cfsrvl.h>
/* CAIF Control packet commands */
enum cfctrl_cmd {
CFCTRL_CMD_LINK_SETUP = 0,
CFCTRL_CMD_LINK_DESTROY = 1,
CFCTRL_CMD_LINK_ERR = 2,
CFCTRL_CMD_ENUM = 3,
CFCTRL_CMD_SLEEP = 4,
CFCTRL_CMD_WAKE = 5,
CFCTRL_CMD_LINK_RECONF = 6,
CFCTRL_CMD_START_REASON = 7,
CFCTRL_CMD_RADIO_SET = 8,
CFCTRL_CMD_MODEM_SET = 9,
CFCTRL_CMD_MASK = 0xf
};
/* Channel types */
enum cfctrl_srv {
CFCTRL_SRV_DECM = 0,
CFCTRL_SRV_VEI = 1,
CFCTRL_SRV_VIDEO = 2,
CFCTRL_SRV_DBG = 3,
CFCTRL_SRV_DATAGRAM = 4,
CFCTRL_SRV_RFM = 5,
CFCTRL_SRV_UTIL = 6,
CFCTRL_SRV_MASK = 0xf
};
#define CFCTRL_RSP_BIT 0x20
#define CFCTRL_ERR_BIT 0x10
struct cfctrl_rsp {
void (*linksetup_rsp)(struct cflayer *layer, u8 linkid,
enum cfctrl_srv serv, u8 phyid,
struct cflayer *adapt_layer);
void (*linkdestroy_rsp)(struct cflayer *layer, u8 linkid);
void (*linkerror_ind)(void);
void (*enum_rsp)(void);
void (*sleep_rsp)(void);
void (*wake_rsp)(void);
void (*restart_rsp)(void);
void (*radioset_rsp)(void);
void (*reject_rsp)(struct cflayer *layer, u8 linkid,
struct cflayer *client_layer);
};
/* Link Setup Parameters for CAIF-Links. */
struct cfctrl_link_param {
enum cfctrl_srv linktype;/* (T3,T0) Type of Channel */
u8 priority; /* (P4,P0) Priority of the channel */
u8 phyid; /* (U2-U0) Physical interface to connect */
u8 endpoint; /* (E1,E0) Endpoint for data channels */
u8 chtype; /* (H1,H0) Channel-Type, applies to
* VEI, DEBUG */
union {
struct {
u8 connid; /* (D7,D0) Video LinkId */
} video;
struct {
u32 connid; /* (N31,Ngit0) Connection ID used
* for Datagram */
} datagram;
struct {
u32 connid; /* Connection ID used for RFM */
char volume[20]; /* Volume to mount for RFM */
} rfm; /* Configuration for RFM */
struct {
u16 fifosize_kb; /* Psock FIFO size in KB */
u16 fifosize_bufs; /* Psock # signal buffers */
char name[16]; /* Name of the PSOCK service */
u8 params[255]; /* Link setup Parameters> */
u16 paramlen; /* Length of Link Setup
* Parameters */
} utility; /* Configuration for Utility Links (Psock) */
} u;
};
/* This structure is used internally in CFCTRL */
struct cfctrl_request_info {
int sequence_no;
enum cfctrl_cmd cmd;
u8 channel_id;
struct cfctrl_link_param param;
struct cflayer *client_layer;
struct list_head list;
};
struct cfctrl {
struct cfsrvl serv;
struct cfctrl_rsp res;
atomic_t req_seq_no;
atomic_t rsp_seq_no;
struct list_head list;
/* Protects from simultaneous access to first_req list */
spinlock_t info_list_lock;
#ifndef CAIF_NO_LOOP
u8 loop_linkid;
int loop_linkused[256];
/* Protects simultaneous access to loop_linkid and loop_linkused */
spinlock_t loop_linkid_lock;
#endif
};
void cfctrl_enum_req(struct cflayer *cfctrl, u8 physlinkid);
int cfctrl_linkup_request(struct cflayer *cfctrl,
struct cfctrl_link_param *param,
struct cflayer *user_layer);
int cfctrl_linkdown_req(struct cflayer *cfctrl, u8 linkid,
struct cflayer *client);
struct cflayer *cfctrl_create(void);
struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer);
int cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer);
void cfctrl_remove(struct cflayer *layr);
#endif /* CFCTRL_H_ */
/td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Bjorn Helgaas <bhelgaas@google.com></td><td class='right'>2017-01-27 15:00:45 -0600</td></tr>
<tr><th>committer</th><td>Bjorn Helgaas <bhelgaas@google.com></td><td class='right'>2017-01-27 15:00:45 -0600</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/fsl/p1022_rdk.c?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>030305d69fc6963c16003f50d7e8d74b02d0a143</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/fsl/p1022_rdk.c?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>363a4e34d199178769b7e7eeb26ea2620a55847b</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/fsl/p1022_rdk.c?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>sound/soc/fsl/p1022_rdk.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/fsl/p1022_rdk.c?id=4d191b1b63c209e37bf27938ef365244d3c41084'>4d191b1b63c209e37bf27938ef365244d3c41084</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/fsl/p1022_rdk.c?id=030305d69fc6963c16003f50d7e8d74b02d0a143&id2=4d191b1b63c209e37bf27938ef365244d3c41084'>diff</a>)</td></tr></table>
<div class='commit-subject'>PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies</div><div class='commit-msg'>In a struct pcie_link_state, link->root points to the pcie_link_state of
the root of the PCIe hierarchy. For the topmost link, this points to
itself (link->root = link). For others, we copy the pointer from the
parent (link->root = link->parent->root).
Previously we recognized that Root Ports originated PCIe hierarchies, but
we treated PCI/PCI-X to PCIe Bridges as being in the middle of the
hierarchy, and when we tried to copy the pointer from link->parent->root,
there was no parent, and we dereferenced a NULL pointer:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000090
IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820
Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just
like Root Ports do, so link->root for these devices should also point to
itself.
Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181
Tested-by: lists@ssl-mail.com
Tested-by: Jayachandran C. <jnair@caviumnetworks.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v4.2+</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>Diffstat</a> (limited to 'sound/soc/fsl/p1022_rdk.c')</div><table summary='diffstat' class='diffstat'>