From: Adrian Hunter <adrian.hunter@intel.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, linux-i3c@lists.infradead.org
Subject: [PATCH 2/7] i3c: mipi-i3c-hci: Stop reading Extended Capabilities if capability ID is 0
Date: Tue, 9 Dec 2025 13:50:59 +0200 [thread overview]
Message-ID: <20251209115104.124156-3-adrian.hunter@intel.com> (raw)
In-Reply-To: <20251209115104.124156-1-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>
---
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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next prev parent reply other threads:[~2025-12-09 11:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-09 11:50 [PATCH 0/7] i3c: mipi-i3c-hci-pci: Define Multi-Bus Instances for Intel controllers Adrian Hunter
2025-12-09 11:50 ` [PATCH 1/7] i3c: mipi-i3c-hci: Remove duplicate blank lines Adrian Hunter
2025-12-09 16:21 ` Frank Li
2025-12-09 11:50 ` Adrian Hunter [this message]
2025-12-09 16:22 ` [PATCH 2/7] i3c: mipi-i3c-hci: Stop reading Extended Capabilities if capability ID is 0 Frank Li
2025-12-09 11:51 ` [PATCH 3/7] i3c: mipi-i3c-hci: Quieten initialization messages Adrian Hunter
2025-12-09 16:25 ` Frank Li
2025-12-09 11:51 ` [PATCH 4/7] i3c: mipi-i3c-hci: Allow for Multi-Bus Instances Adrian Hunter
2025-12-09 11:51 ` [PATCH 5/7] i3c: mipi-i3c-hci-pci: Define default driver data Adrian Hunter
2025-12-09 16:36 ` Frank Li
2025-12-10 8:27 ` Adrian Hunter
2025-12-10 15:14 ` Frank Li
2025-12-09 11:51 ` [PATCH 6/7] i3c: mipi-i3c-hci-pci: Add support for Multi-Bus Instances Adrian Hunter
2025-12-09 17:10 ` Frank Li
2025-12-10 9:17 ` Adrian Hunter
2025-12-10 15:13 ` Frank Li
2025-12-10 6:01 ` Krzysztof Kozlowski
2025-12-09 11:51 ` [PATCH 7/7] i3c: mipi-i3c-hci-pci: Define Multi-Bus Instances for Intel controllers Adrian Hunter
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