diff mbox

[1/2] soc: qcom: smp2p: Correct addressing of outgoing value

Message ID 1465518177-14594-1-git-send-email-bjorn.andersson@linaro.org
State Accepted
Commit 63af8e44eaa56ffe613628742a2642c4c2f1a029
Headers show

Commit Message

Bjorn Andersson June 10, 2016, 12:22 a.m. UTC 
The valid_entries index should not be incremented until after we have
acquired the pointer to the value, or we will read and write data one
item off.

Fixes: 50e99641413e ("soc: qcom: smp2p: Qualcomm Shared Memory Point to Point")
Cc: stable@vger.kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

---
 drivers/soc/qcom/smp2p.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.5.0

--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
index f1eed7f9dd67..9c2788b8f2c3 100644
--- a/drivers/soc/qcom/smp2p.c
+++ b/drivers/soc/qcom/smp2p.c
@@ -344,11 +344,12 @@  static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p,
 	/* Allocate an entry from the smem item */
 	strlcpy(buf, entry->name, SMP2P_MAX_ENTRY_NAME);
 	memcpy_toio(out->entries[out->valid_entries].name, buf, SMP2P_MAX_ENTRY_NAME);
-	out->valid_entries++;
 
 	/* Make the logical entry reference the physical value */
 	entry->value = &out->entries[out->valid_entries].value;
 
+	out->valid_entries++;
+
 	entry->state = qcom_smem_state_register(node, &smp2p_state_ops, entry);
 	if (IS_ERR(entry->state)) {
 		dev_err(smp2p->dev, "failed to register qcom_smem_state\n");