diff mbox series

[v4,09/12] bus: mhi: core: Check for IRQ availability during registration

Message ID 1604954851-23396-10-git-send-email-bbhatt@codeaurora.org (mailing list archive)
State Accepted
Commit 40c3127187cb38ed255ba4473e11cd70385c7431
Headers show
Series Bug fixes and improvements for MHI power operations | expand

Commit Message

Bhaumik Bhatt Nov. 9, 2020, 8:47 p.m. UTC 
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@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/bus/mhi/core/init.c | 2 +-
 drivers/bus/mhi/core/pm.c   | 3 ---
 2 files changed, 1 insertion(+), 4 deletions(-)
diff mbox series

Patch

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) {