| Message ID | 1521785487-29866-3-git-send-email-mgautam@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Thu, Mar 22, 2018 at 11:13 PM Manu Gautam <mgautam@codeaurora.org> wrote: > Driver currently crashes due to NULL pointer deference > while updating PHY tune register if nvmem cell is NULL. > Since, fused value for Tune1/2 register is optional, > we'd rather bail out. > Fixes: ca04d9d3e1b1 ("phy: qcom-qusb2: New driver for QUSB2 PHY on Qcom chips") > Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org> > Cc: stable <stable@vger.kernel.org> # 4.14+ > Signed-off-by: Manu Gautam <mgautam@codeaurora.org> > --- > drivers/phy/qualcomm/phy-qcom-qusb2.c | 4 ++++ > 1 file changed, 4 insertions(+) Reviewed-by: Evan Green <evgreen@chromium.org> -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/phy/qualcomm/phy-qcom-qusb2.c b/drivers/phy/qualcomm/phy-qcom-qusb2.c index 94afeac..40fdef8 100644 --- a/drivers/phy/qualcomm/phy-qcom-qusb2.c +++ b/drivers/phy/qualcomm/phy-qcom-qusb2.c @@ -315,6 +315,10 @@ static void qusb2_phy_set_tune2_param(struct qusb2_phy *qphy) const struct qusb2_phy_cfg *cfg = qphy->cfg; u8 *val; + /* efuse register is optional */ + if (!qphy->cell) + return; + /* * Read efuse register having TUNE2/1 parameter's high nibble. * If efuse register shows value as 0x0, or if we fail to find
Driver currently crashes due to NULL pointer deference while updating PHY tune register if nvmem cell is NULL. Since, fused value for Tune1/2 register is optional, we'd rather bail out. Fixes: ca04d9d3e1b1 ("phy: qcom-qusb2: New driver for QUSB2 PHY on Qcom chips") Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org> Cc: stable <stable@vger.kernel.org> # 4.14+ Signed-off-by: Manu Gautam <mgautam@codeaurora.org> --- drivers/phy/qualcomm/phy-qcom-qusb2.c | 4 ++++ 1 file changed, 4 insertions(+)