The shared_hcd->hcd_priv is not used in xhci, so not
need to malloc hcd priv memory for shared_hcd.
This change add a shared_hcd_no_priv flag to indicate
if shared_hcd use priv, and set the flag of xhci to 1.
Signed-off-by: Tao Wang <quic_wat@xxxxxxxxxxx>
---
drivers/usb/core/hcd.c | 6 +++++-
drivers/usb/host/xhci-plat.c | 1 +
include/linux/usb/hcd.h | 1 +
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 99908d8..f339c3e 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2419,7 +2419,11 @@ struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver,
{
struct usb_hcd *hcd;
- hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL);
+ if (primary_hcd && driver->shared_hcd_no_priv)
+ hcd = kzalloc(sizeof(*hcd), GFP_KERNEL);
+ else
+ hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL);
+
if (!hcd)
return NULL;
if (primary_hcd == NULL) {
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 21280a6..223e508 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -236,6 +236,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
return -ENODEV;
driver = &xhci_plat_hc_driver;
+ driver->shared_hcd_no_priv = 1;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 2ffafbd..03ac312 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -256,6 +256,7 @@ struct hc_driver {
const char *description; /* "ehci-hcd" etc */
const char *product_desc; /* product/vendor string */
size_t hcd_priv_size; /* size of private data */
+ bool shared_hcd_no_priv; /* 0 use priv, 1 not use priv*/
/* irq handler */
irqreturn_t (*irq) (struct usb_hcd *hcd);
--
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