/* * Renesas USB driver * * Copyright (C) 2011 Renesas Solutions Corp. * Kuninori Morimoto * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #ifndef RENESAS_USB_MOD_H #define RENESAS_USB_MOD_H #include #include #include "common.h" /* * struct */ struct usbhs_irq_state { u16 intsts0; u16 intsts1; u16 brdysts; u16 nrdysts; u16 bempsts; }; struct usbhs_mod { char *name; /* * entry point from common.c */ int (*start)(struct usbhs_priv *priv); int (*stop)(struct usbhs_priv *priv); /* * INTSTS0 */ /* DVST (DVSQ) */ int (*irq_dev_state)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); /* CTRT (CTSQ) */ int (*irq_ctrl_stage)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); /* BEMP / BEMPSTS */ int (*irq_empty)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); u16 irq_bempsts; /* BRDY / BRDYSTS */ int (*irq_ready)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); u16 irq_brdysts; /* * INTSTS1 */ /* ATTCHE */ int (*irq_attch)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); /* DTCHE */ int (*irq_dtch)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); /* SIGN */ int (*irq_sign)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); /* SACK */ int (*irq_sack)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); struct usbhs_priv *priv; }; struct usbhs_mod_info { struct usbhs_mod *mod[USBHS_MAX]; struct usbhs_mod *curt; /* current mod */ /* * INTSTS0 :: VBINT * * This function will be used as autonomy mode * when platform cannot call notify_hotplug. * * This callback cannot be member of "struct usbhs_mod" * because it will be used even though * host/gadget has not been selected. */ int (*irq_vbus)(struct usbhs_priv *priv, struct usbhs_irq_state *irq_state); }; /* * for host/gadget module */ struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id); struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv); void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *usb, int id); int usbhs_mod_is_host(struct usbhs_priv *priv); int usbhs_mod_change(struct usbhs_priv *priv, int id); int usbhs_mod_probe(struct usbhs_priv *priv); void usbhs_mod_remove(struct usbhs_priv *priv); void usbhs_mod_autonomy_mode(struct usbhs_priv *priv); /* * status functions */ int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state); int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state); /* * callback functions */ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod); #define usbhs_mod_call(priv, func, param...) \ ({ \ struct usbhs_mod *mod; \ mod = usbhs_mod_get_current(priv); \ !mod ? -ENODEV : \ !mod->func ? 0 : \ mod->func(param); \ }) /* * host / gadget control */ #if defined(CONFIG_USB_RENESAS_USBHS_HCD) || \ defined(CONFIG_USB_RENESAS_USBHS_HCD_MODULE) extern int usbhs_mod_host_probe(struct usbhs_priv *priv); extern int usbhs_mod_host_remove(struct usbhs_priv *priv); #else static inline int usbhs_mod_host_probe(struct usbhs_priv *priv) { return 0; } static inline void usbhs_mod_host_remove(struct usbhs_priv *priv) { } #endif #if defined(CONFIG_USB_RENESAS_USBHS_UDC) || \ defined(CONFIG_USB_RENESAS_USBHS_UDC_MODULE) extern int usbhs_mod_gadget_probe(struct usbhs_priv *priv); extern void usbhs_mod_gadget_remove(struct usbhs_priv *priv); #else static inline int usbhs_mod_gadget_probe(struct usbhs_priv *priv) { return 0; } static inline void usbhs_mod_gadget_remove(struct usbhs_priv *priv) { } #endif #endif /* RENESAS_USB_MOD_H */ alue='0' selected='selected'>unified
authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /net/rds/info.h
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
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+
Diffstat (limited to 'net/rds/info.h')