>From 3d4594cf069e088038cb35753e3abc70e3a994d9 Mon Sep 17 00:00:00 2001
From: Andiry Xu <andiry.xu@xxxxxxx>
Date: Mon, 30 Aug 2010 13:35:13 +0800
Subject: [PATCH 1/3] xHCI: Add pointer to udev in struct xhci_virt_device
Add a pointer to udev in struct xhci_virt_device. When allocate a new
virt_device, make the pointer point to the corresponding udev.
Modify xhci_check_args(), check if virt_dev->udev matches the target udev,
to make sure command is issued to the right device.
Signed-off-by: Andiry Xu <andiry.xu@xxxxxxx>
---
drivers/usb/host/xhci-mem.c | 1 +
drivers/usb/host/xhci.c | 83 +++++++++++++++++-------------------------
drivers/usb/host/xhci.h | 1 +
3 files changed, 36 insertions(+), 49 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 4e51343..be90180 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -778,6 +778,7 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
init_completion(&dev->cmd_completion);
INIT_LIST_HEAD(&dev->cmd_list);
+ dev->udev = udev;
/* Point to output device context in dcbaa. */
xhci->dcbaa->dev_context_ptrs[slot_id] = dev->out_ctx->dma;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index d5c550e..4201119 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -607,7 +607,11 @@ unsigned int xhci_last_valid_endpoint(u32 added_ctxs)
* returns 0 this is a root hub; returns -EINVAL for NULL pointers.
*/
int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev,
- struct usb_host_endpoint *ep, int check_ep, const char *func) {
+ struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev,
+ const char *func) {
+ struct xhci_hcd *xhci;
+ struct xhci_virt_device *virt_dev;
+
if (!hcd || (check_ep && !ep) || !udev) {
printk(KERN_DEBUG "xHCI %s called with invalid args\n",
func);
@@ -618,11 +622,24 @@ int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev,
func);
return 0;
}
- if (!udev->slot_id) {
- printk(KERN_DEBUG "xHCI %s called with unaddressed device\n",
- func);
- return -EINVAL;
+
+ if (check_virt_dev) {
+ xhci = hcd_to_xhci(hcd);
+ if (!udev->slot_id || !xhci->devs
+ || !xhci->devs[udev->slot_id]) {
+ printk(KERN_DEBUG "xHCI %s called with unaddressed "
+ "device\n", func);
+ return -EINVAL;
+ }
+
+ virt_dev = xhci->devs[udev->slot_id];
+ if (virt_dev->udev != udev) {
+ printk(KERN_DEBUG "xHCI %s called with udev and "
+ "virt_dev does not match\n", func);
+ return -EINVAL;
+ }
}
+
return 1;
}
@@ -704,18 +721,13 @@ int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
struct urb_priv *urb_priv;
int size, i;
- if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, true, __func__) <= 0)
+ if (!urb || xhci_check_args(hcd, urb->dev, urb->ep,
+ true, true, __func__) <= 0)
return -EINVAL;
slot_id = urb->dev->slot_id;
ep_index = xhci_get_endpoint_index(&urb->ep->desc);
- if (!xhci->devs || !xhci->devs[slot_id]) {
- if (!in_interrupt())
- dev_warn(&urb->dev->dev, "WARN: urb submitted for dev with no Slot ID\n");
- ret = -EINVAL;
- goto exit;
- }
if (!HCD_HW_ACCESSIBLE(hcd)) {
if (!in_interrupt())
xhci_dbg(xhci, "urb submitted during PCI suspend\n");
@@ -991,7 +1003,7 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
u32 new_add_flags, new_drop_flags, new_slot_info;
int ret;
- ret = xhci_check_args(hcd, udev, ep, 1, __func__);
+ ret = xhci_check_args(hcd, udev, ep, 1, true, __func__);
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
@@ -1004,12 +1016,6 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
return 0;
}
- if (!xhci->devs || !xhci->devs[udev->slot_id]) {
- xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
- __func__);
- return -EINVAL;
- }
-
in_ctx = xhci->devs[udev->slot_id]->in_ctx;
out_ctx = xhci->devs[udev->slot_id]->out_ctx;
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
@@ -1078,7 +1084,7 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
u32 new_add_flags, new_drop_flags, new_slot_info;
int ret = 0;
- ret = xhci_check_args(hcd, udev, ep, 1, __func__);
+ ret = xhci_check_args(hcd, udev, ep, 1, true, __func__);
if (ret <= 0) {
/* So we won't queue a reset ep command for a root hub */
ep->hcpriv = NULL;
@@ -1098,12 +1104,6 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
return 0;
}
- if (!xhci->devs || !xhci->devs[udev->slot_id]) {
- xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
- __func__);
- return -EINVAL;
- }
-
in_ctx = xhci->devs[udev->slot_id]->in_ctx;
out_ctx = xhci->devs[udev->slot_id]->out_ctx;
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
@@ -1346,16 +1346,11 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
struct xhci_input_control_ctx *ctrl_ctx;
struct xhci_slot_ctx *slot_ctx;
- ret = xhci_check_args(hcd, udev, NULL, 0, __func__);
+ ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
- if (!udev->slot_id || !xhci->devs || !xhci->devs[udev->slot_id]) {
- xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
- __func__);
- return -EINVAL;
- }
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
virt_dev = xhci->devs[udev->slot_id];
@@ -1405,16 +1400,11 @@ void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
struct xhci_virt_device *virt_dev;
int i, ret;
- ret = xhci_check_args(hcd, udev, NULL, 0, __func__);
+ ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
if (ret <= 0)
return;
xhci = hcd_to_xhci(hcd);
- if (!xhci->devs || !xhci->devs[udev->slot_id]) {
- xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
- __func__);
- return;
- }
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
virt_dev = xhci->devs[udev->slot_id];
/* Free any rings allocated for added endpoints */
@@ -1575,7 +1565,7 @@ static int xhci_check_streams_endpoint(struct xhci_hcd *xhci,
if (!ep)
return -EINVAL;
- ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, __func__);
+ ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__);
if (ret <= 0)
return -EINVAL;
if (ep->ss_ep_comp.bmAttributes == 0) {
@@ -1965,17 +1955,12 @@ int xhci_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
int timeleft;
int last_freed_endpoint;
- ret = xhci_check_args(hcd, udev, NULL, 0, __func__);
+ ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
slot_id = udev->slot_id;
virt_dev = xhci->devs[slot_id];
- if (!virt_dev) {
- xhci_dbg(xhci, "%s called with invalid slot ID %u\n",
- __func__, slot_id);
- return -EINVAL;
- }
xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id);
/* Allocate the command structure that holds the struct completion.
@@ -2077,13 +2062,13 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
struct xhci_virt_device *virt_dev;
unsigned long flags;
u32 state;
- int i;
+ int i, ret;
- if (udev->slot_id == 0)
+ ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
+ if (ret <= 0)
return;
+
virt_dev = xhci->devs[udev->slot_id];
- if (!virt_dev)
- return;
/* Stop any wayward timer functions (which may grab the lock) */
for (i = 0; i < 31; ++i) {
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 34a60d9..f03f140 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -731,6 +731,7 @@ struct xhci_virt_ep {
};
struct xhci_virt_device {
+ struct usb_device *udev;
/*
* Commands to the hardware are passed an "input context" that
* tells the hardware what to change in its data structures.
--
1.7.0.4
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