usb: cdnsp: Fix segmentation fault in cdns_lost_power function

CDNSP driver read not initialized cdns->otg_v0_regs
which lead to segmentation fault. Patch fixes this issue.

Fixes: 2cf2581cd229 ("usb: cdns3: add power lost support for system resume")
cc: <stable@vger.kernel.org>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20220111090737.10345-1-pawell@gli-login.cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c
index 55c73b1..d00ff98 100644 (file)
--- a/drivers/usb/cdns3/drd.c
+++ b/drivers/usb/cdns3/drd.c
@@ -483,11 +483,11 @@ int cdns_drd_exit(struct cdns *cdns)
 /* Indicate the cdns3 core was power lost before */
 bool cdns_power_is_lost(struct cdns *cdns)
 {
-       if (cdns->version == CDNS3_CONTROLLER_V1) {
-               if (!(readl(&cdns->otg_v1_regs->simulate) & BIT(0)))
+       if (cdns->version == CDNS3_CONTROLLER_V0) {
+               if (!(readl(&cdns->otg_v0_regs->simulate) & BIT(0)))
                        return true;
        } else {
-               if (!(readl(&cdns->otg_v0_regs->simulate) & BIT(0)))
+               if (!(readl(&cdns->otg_v1_regs->simulate) & BIT(0)))
                        return true;
        }
        return false;