[PATCH] ufs: ufshcd: Use of_property_count_u32_elems() to get property length

[PATCH] ufs: ufshcd: Use of_property_count_u32_elems() to get property length

[Rob Herring (Arm)]

Replace of_get_property() with the type specific
of_property_count_u32_elems() to get the property length.

This is part of a larger effort to remove callers of of_get_property()
and similar functions. of_get_property() leaks the DT property data
pointer which is a problem for dynamically allocated nodes which may
be freed.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
 drivers/ufs/host/ufshcd-pltfrm.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/ufs/host/ufshcd-pltfrm.c b/drivers/ufs/host/ufshcd-pltfrm.c
index 2e1eb898a27c..0c9b303ccfa0 100644
--- a/drivers/ufs/host/ufshcd-pltfrm.c
+++ b/drivers/ufs/host/ufshcd-pltfrm.c
@@ -31,7 +31,6 @@ static int ufshcd_parse_clock_info(struct ufs_hba *hba)
 	const char *name;
 	u32 *clkfreq = NULL;
 	struct ufs_clk_info *clki;
-	int len = 0;
 	size_t sz = 0;
 
 	if (!np)
@@ -50,15 +49,12 @@ static int ufshcd_parse_clock_info(struct ufs_hba *hba)
 	if (cnt <= 0)
 		goto out;
 
-	if (!of_get_property(np, "freq-table-hz", &len)) {
+	sz = of_property_count_u32_elems(np, "freq-table-hz");
+	if (sz <= 0) {
 		dev_info(dev, "freq-table-hz property not specified\n");
 		goto out;
 	}
 
-	if (len <= 0)
-		goto out;
-
-	sz = len / sizeof(*clkfreq);
 	if (sz != 2 * cnt) {
 		dev_err(dev, "%s len mismatch\n", "freq-table-hz");
 		ret = -EINVAL;
-- 
2.43.0

Re: [PATCH] ufs: ufshcd: Use of_property_count_u32_elems() to get property length

[Bart Van Assche]

On 7/31/24 1:14 PM, Rob Herring (Arm) wrote:
> Replace of_get_property() with the type specific
> of_property_count_u32_elems() to get the property length.
> 
> This is part of a larger effort to remove callers of of_get_property()
> and similar functions. of_get_property() leaks the DT property data
> pointer which is a problem for dynamically allocated nodes which may
> be freed.

The "ufshcd:" qualifier in the patch subject is confusing. Please change
this into something that unambiguously refers to the platform driver.

Thanks,

Bart.