linux-kernel - [PATCH v2 15/41] media: atomisp: add debug for hmm alloc

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Message-Id: <6b9fbe34195df5a2ef410f0e877b47ba90bb2aa3.1590821410.git.mchehab+huawei@kernel.org>
Date:   Sat, 30 May 2020 08:55:32 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 15/41] media: atomisp: add debug for hmm alloc

The hmm code is still complex and has bugs. Add a debug print
when memory gets allocated, in order to help identifying what's
happening out there.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/staging/media/atomisp/pci/hmm/hmm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm.c b/drivers/staging/media/atomisp/pci/hmm/hmm.c
index 5e983442ca80..c8a6e2d6e498 100644
--- a/drivers/staging/media/atomisp/pci/hmm/hmm.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm.c
@@ -253,7 +253,7 @@ ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type,
 		goto alloc_page_err;
 	}
 
-	/* Combind the virtual address and pages togather */
+	/* Combine the virtual address and pages together */
 	ret = hmm_bo_bind(bo);
 	if (ret) {
 		dev_err(atomisp_dev, "hmm_bo_bind failed.\n");
@@ -265,6 +265,10 @@ ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type,
 	if (attrs & ATOMISP_MAP_FLAG_CLEARED)
 		hmm_set(bo->start, 0, bytes);
 
+	    dev_dbg(atomisp_dev,
+	    "%s: pages: 0x%08x (%ld bytes), type: %d from highmem %d, user ptr %p, cached %d\n",
+	    __func__, bo->start, bytes, type, from_highmem, userptr, cached);
+
 	return bo->start;
 
 bind_err:
-- 
2.26.2