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bus: mhi: core: Check for IRQ availability during registration

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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>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Bhaumik Bhatt 2020-11-09 12:47:28 -08:00 committed by Manivannan Sadhasivam
parent dc53d862ea
commit 40c3127187
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GPG Key ID: 559F11E6FE91CEF5
2 changed files with 1 additions and 4 deletions
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2
drivers/bus/mhi/core/init.c
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@ -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);

3
drivers/bus/mhi/core/pm.c
View File

@ -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) {