linux-kernel - [PATCH v4 09/12] bus: mhi: core: Check for IRQ availability during registration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1604954851-23396-10-git-send-email-bbhatt@codeaurora.org>
Date:   Mon,  9 Nov 2020 12:47:28 -0800
From:   Bhaumik Bhatt <bbhatt@...eaurora.org>
To:     manivannan.sadhasivam@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        Bhaumik Bhatt <bbhatt@...eaurora.org>
Subject: [PATCH v4 09/12] bus: mhi: core: Check for IRQ availability during registration

Current design allows a controller to register with MHI successfully
without the need to have any IRQs available for use. If no IRQs are
available, power up requests to MHI can fail after a successful
registration with MHI. Improve the design by checking for the number
of IRQs available sooner within the mhi_regsiter_controller() API as
it is required to be specified by the controller.

Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/bus/mhi/core/init.c | 2 +-
 drivers/bus/mhi/core/pm.c   | 3 ---
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 877e40c..2534f1c 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -858,7 +858,7 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
 
 	if (!mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
 	    !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
-	    !mhi_cntrl->write_reg)
+	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs)
 		return -EINVAL;
 
 	ret = parse_config(mhi_cntrl, config);
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index 06adea2..1d04e401 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -926,9 +926,6 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
 
 	dev_info(dev, "Requested to power ON\n");
 
-	if (mhi_cntrl->nr_irqs < 1)
-		return -EINVAL;
-
 	/* Supply default wake routines if not provided by controller driver */
 	if (!mhi_cntrl->wake_get || !mhi_cntrl->wake_put ||
 	    !mhi_cntrl->wake_toggle) {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project