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msm: ipa3: Handle race condition to avoid NULL access

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Updated change to avoid race condition and NULL pointer access,
In case of SSR and ioctl call while performing QMI transaction.

Change-Id: I09dbf33d76a3a0d9e4917e62aaf1257a1abe2db9
Signed-off-by: Raghavendar rao l <quic_rlomte@quicinc.com>
This commit is contained in:
Raghavendar rao l 2022-03-14 20:19:10 +05:30
commit 1a79536d0e
1 changed files with 12 additions and 7 deletions
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19
drivers/platform/msm/ipa/ipa_v3/ipa_qmi_service.c
View file

@ -467,14 +467,22 @@ static int ipa3_qmi_send_req_wait(struct qmi_handle *client_handle,
struct qmi_txn txn;
int ret;
mutex_lock(&ipa3_qmi_lock);
if (!client_handle) {
mutex_unlock(&ipa3_qmi_lock);
return -EINVAL;
}
ret = qmi_txn_init(client_handle, &txn, resp_desc->ei_array, resp);
if (ret < 0) {
IPAWANERR("QMI txn init failed, ret= %d\n", ret);
mutex_unlock(&ipa3_qmi_lock);
return ret;
}
mutex_lock(&ipa3_qmi_lock);
ret = qmi_send_request(client_handle,
&ipa3_qmi_ctx->server_sq,
&txn,
@ -483,19 +491,16 @@ static int ipa3_qmi_send_req_wait(struct qmi_handle *client_handle,
req_desc->ei_array,
req);
if (unlikely(!ipa_q6_clnt)) {
mutex_unlock(&ipa3_qmi_lock);
return -EINVAL;
}
mutex_unlock(&ipa3_qmi_lock);
if (ret < 0) {
qmi_txn_cancel(&txn);
mutex_unlock(&ipa3_qmi_lock);
return ret;
}
ret = qmi_txn_wait(&txn, msecs_to_jiffies(timeout_ms));
ret = qmi_txn_wait(&txn, msecs_to_jiffies(timeout_ms));
mutex_unlock(&ipa3_qmi_lock);
return ret;
}