diff options
| author | Akash Asthana <akashast@codeaurora.org> | 2020-07-17 20:02:22 +0530 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-07-20 13:11:15 -0700 |
| commit | 03c900b3be116003ccd0e798431f6d0c25ff6729 (patch) | |
| tree | d69653b99c19c5a1c449ddeb8c04031361435c4a /drivers/soc | |
| parent | 4a3107f61f1ce2c8ccd4dde8ae655ae3f2996f35 (diff) | |
soc: qcom: geni: Fix NULL pointer dereference
pdev struct doesn't exits for the devices whose status are disabled
from DT node, in such cases NULL is returned from 'of_find_device_by_node'
Later when we try to get drvdata from pdev struct NULL pointer dereference
is triggered.
Add a NULL check for return values to fix the issue.
We were hitting this issue when one of QUP is disabled.
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: 048eb908a1f2 ("soc: qcom-geni-se: Add interconnect support to fix earlycon crash")
Reported-by: Sai Prakash Ranjan <saipraka@codeaurora.org>
Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Link: https://lore.kernel.org/r/1594996342-26964-1-git-send-email-akashast@codeaurora.org
[bjorn: s/wrapper_pdev/pdev/]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/qcom/qcom-geni-se.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 355d503b7008..3413129d73ef 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -817,6 +817,7 @@ EXPORT_SYMBOL(geni_icc_disable); void geni_remove_earlycon_icc_vote(void) { + struct platform_device *pdev; struct geni_wrapper *wrapper; struct device_node *parent; struct device_node *child; @@ -829,7 +830,12 @@ void geni_remove_earlycon_icc_vote(void) for_each_child_of_node(parent, child) { if (!of_device_is_compatible(child, "qcom,geni-se-qup")) continue; - wrapper = platform_get_drvdata(of_find_device_by_node(child)); + + pdev = of_find_device_by_node(child); + if (!pdev) + continue; + + wrapper = platform_get_drvdata(pdev); icc_put(wrapper->to_core.path); wrapper->to_core.path = NULL; |