@@ -2356,7 +2356,7 @@ xhci_add_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir,
}
struct xhci_interrupter *
-xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg)
+xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg, int intr_num)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct xhci_interrupter *ir;
@@ -2371,28 +2371,30 @@ xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg)
return NULL;
spin_lock_irq(&xhci->lock);
-
- /* Find available secondary interrupter, interrupter 0 is reserved for primary */
+ /* Find available secondary interrupter, interrupter 0 is reserverd for primary */
for (i = 1; i < xhci->max_interrupters; i++) {
- if (xhci->interrupters[i] == NULL) {
- err = xhci_add_interrupter(xhci, ir, i);
- break;
+ if ((intr_num > 0 && i == intr_num) || intr_num <= 0) {
+ if (xhci->interrupters[i] == NULL) {
+ err = xhci_add_interrupter(xhci, ir, i);
+ if (err) {
+ spin_unlock_irq(&xhci->lock);
+ goto free_ir;
+ }
+ break;
+ }
}
}
-
spin_unlock_irq(&xhci->lock);
- if (err) {
- xhci_warn(xhci, "Failed to add secondary interrupter, max interrupters %d\n",
- xhci->max_interrupters);
- xhci_free_interrupter(xhci, ir);
- return NULL;
- }
-
xhci_dbg(xhci, "Add secondary interrupter %d, max interrupters %d\n",
i, xhci->max_interrupters);
return ir;
+
+free_ir:
+ xhci_free_interrupter(xhci, ir);
+
+ return NULL;
}
EXPORT_SYMBOL_GPL(xhci_create_secondary_interrupter);
@@ -243,13 +243,13 @@ EXPORT_SYMBOL_GPL(xhci_sideband_get_event_buffer);
* Returns 0 on success, negative error otherwise
*/
int
-xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg)
+xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg, int intr_num)
{
if (sb->ir)
return -EBUSY;
sb->ir = xhci_create_secondary_interrupter(xhci_to_hcd(sb->xhci),
- num_seg);
+ num_seg, intr_num);
if (!sb->ir)
return -ENOMEM;
@@ -2090,7 +2090,7 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
void xhci_free_container_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx);
struct xhci_interrupter *
-xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg);
+xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg, int intr_num);
void xhci_remove_secondary_interrupter(struct usb_hcd
*hcd, struct xhci_interrupter *ir);
void xhci_skip_sec_intr_events(struct xhci_hcd *xhci,
@@ -54,7 +54,8 @@ struct sg_table *
xhci_sideband_get_event_buffer(struct xhci_sideband *sb);
int
-xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg);
+xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
+ int intr_num);
void
xhci_sideband_remove_interrupter(struct xhci_sideband *sb);
Some clients may operate only on a specific XHCI interrupter instance. Allow for the associated class driver to request for the interrupter that it requires. Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> --- drivers/usb/host/xhci-mem.c | 30 ++++++++++++++++-------------- drivers/usb/host/xhci-sideband.c | 4 ++-- drivers/usb/host/xhci.h | 2 +- include/linux/usb/xhci-sideband.h | 3 ++- 4 files changed, 21 insertions(+), 18 deletions(-)