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* [PATCH v3] bus: mhi: core: Add missing checks for MMIO register entries
@ 2021-03-09 18:44 Bhaumik Bhatt
  2021-03-09 18:56 ` Jeffrey Hugo
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Bhaumik Bhatt @ 2021-03-09 18:44 UTC (permalink / raw)
  To: manivannan.sadhasivam
  Cc: linux-arm-msm, hemantk, jhugo, linux-kernel, carl.yin,
	naveen.kumar, loic.poulain, Bhaumik Bhatt

As per documentation, fields marked as (required) in an MHI
controller structure need to be populated by the controller driver
before calling mhi_register_controller(). Ensure all required
pointers and non-zero fields are present in the controller before
proceeding with the registration.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
---
 v3: removed fw_image as not all controllers require it
 v2: removed iova_start and iova_stop as they can be zero

 drivers/bus/mhi/core/init.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 272f350..d8882b3 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -879,12 +879,10 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
 	u32 soc_info;
 	int ret, i;
 
-	if (!mhi_cntrl)
-		return -EINVAL;
-
-	if (!mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
+	if (!mhi_cntrl || !mhi_cntrl->cntrl_dev || !mhi_cntrl->regs ||
+	    !mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put ||
 	    !mhi_cntrl->status_cb || !mhi_cntrl->read_reg ||
-	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs)
+	    !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || !mhi_cntrl->irq)
 		return -EINVAL;
 
 	ret = parse_config(mhi_cntrl, config);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-05-26 19:04 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-09 18:44 [PATCH v3] bus: mhi: core: Add missing checks for MMIO register entries Bhaumik Bhatt
2021-03-09 18:56 ` Jeffrey Hugo
2021-03-09 18:56 ` Jeffrey Hugo
2021-03-10 13:51 ` Manivannan Sadhasivam
2021-03-10 13:53 ` Manivannan Sadhasivam
2021-05-26 19:03 ` patchwork-bot+linux-arm-msm

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