[PATCH V2 02/10] i3c: mipi-i3c-hci: Stop reading Extended Capabilities if capability ID is 0

From: Adrian Hunter <adrian.hunter@intel.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, linux-i3c@lists.infradead.org
Subject: [PATCH V2 02/10] i3c: mipi-i3c-hci: Stop reading Extended Capabilities if capability ID is 0
Date: Thu, 11 Dec 2025 15:48:01 +0200	[thread overview]
Message-ID: <20251211134809.75872-3-adrian.hunter@intel.com> (raw)
In-Reply-To: <20251211134809.75872-1-adrian.hunter@intel.com>

Extended Capability ID value 0 is special.  It signifies the end of the
list.  Stop reading Extended Capabilities if capability ID is 0.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---


Changes in V2:

	Add Frank's Rev'd-by


 drivers/i3c/master/mipi-i3c-hci/ext_caps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/ext_caps.c b/drivers/i3c/master/mipi-i3c-hci/ext_caps.c
index 40939af0b0e3..024bccf23fd0 100644
--- a/drivers/i3c/master/mipi-i3c-hci/ext_caps.c
+++ b/drivers/i3c/master/mipi-i3c-hci/ext_caps.c
@@ -271,7 +271,7 @@ int i3c_hci_parse_ext_caps(struct i3c_hci *hci)
 		cap_length = FIELD_GET(CAP_HEADER_LENGTH, cap_header);
 		dev_dbg(&hci->master.dev, "id=0x%02x length=%d",
 			cap_id, cap_length);
-		if (!cap_length)
+		if (!cap_id || !cap_length)
 			break;
 		if (curr_cap + cap_length * 4 >= end) {
 			dev_err(&hci->master.dev,
-- 
2.51.0


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