A series of commit starting at
50a97e059b USB: OHCI: make ohci-exynos a separate driver
and ending at
b8ad5c3706 USB: OHCI: make ohci-pxa27x a separate driver
introduced the concept of separate OHCI drivers for particular
controllers. Respective drivers need to call ohci_init_driver() to
initialize hc_driver struct with generic data and to certain extent
with platform specific overrides through ohci_driver_overrides struct
passed as second argument to this function. However the code does not
check if the ohci_driver_overrides struct pointer is non-NULL, which
leads for a NULL pointer dereference for drivers that do not need any
overrides.
This patch fixes the problem by dereferencing the passed pointer to
ohci_driver_overrides struct only if it is non-NULL.
Signed-off-by: Tomasz Figa <tomasz.f...@gmail.com>
---
drivers/usb/host/ohci-hcd.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 21d937a..8ada13f 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1161,10 +1161,12 @@ void ohci_init_driver(struct hc_driver *drv,
/* Copy the generic table to drv and then apply the overrides */
*drv = ohci_hc_driver;
- drv->product_desc = over->product_desc;
- drv->hcd_priv_size += over->extra_priv_size;
- if (over->reset)
- drv->reset = over->reset;
+ if (over) {
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+ }
}
EXPORT_SYMBOL_GPL(ohci_init_driver);
--
1.8.3.2
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