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[61.220.246.151]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72fe631be3csm8377629b3a.7.2025.02.03.05.11.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 05:11:50 -0800 (PST) From: Potin Lai Date: Mon, 03 Feb 2025 21:09:14 +0800 Subject: [PATCH 2/2] ipmi: ssif_bmc: Add support for adjustable response timeout Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250203-ssif-response-timeout-ms-v1-2-6fe279740181@gmail.com> References: <20250203-ssif-response-timeout-ms-v1-0-6fe279740181@gmail.com> In-Reply-To: <20250203-ssif-response-timeout-ms-v1-0-6fe279740181@gmail.com> To: Corey Minyard , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Quan Nguyen , Patrick Williams Cc: openipmi-developer@lists.sourceforge.net, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cosmo Chou , Potin Lai , Potin Lai X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1738588302; l=1887; i=potin.lai.pt@gmail.com; s=20240724; h=from:subject:message-id; bh=/kUKPWCuiO07PV8wX+eiL75OEyrHSx5RcfpFsjZDG/U=; b=6Osmui4mmnSoBdZ1gq0ddokpf1z0Xv5oKdw5ZwDKeeh07nb1EchIXM0IDY8TT+h+DkK/rim1B L1S67E8or2BDDYV7xxZSB+Phz0qXdRGzMx2ulkUpkk+1OR2qQ8mhX57 X-Developer-Key: i=potin.lai.pt@gmail.com; a=ed25519; pk=6Z4H4V4fJwLteH/WzIXSsx6TkuY5FOcBBP+4OflJ5gM= Implement support for the `timeout-ms` device tree property, allowing platforms to adjust the userspace response timeout as needed. If `timeout-ms` is not specified, the default response timeout remains 500 ms. This ensures compatibility while providing flexibility for platforms that require longer timeouts due to BMC or application load. Signed-off-by: Potin Lai --- drivers/char/ipmi/ssif_bmc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/char/ipmi/ssif_bmc.c b/drivers/char/ipmi/ssif_bmc.c index 310f17dd9511..8f0fbc941936 100644 --- a/drivers/char/ipmi/ssif_bmc.c +++ b/drivers/char/ipmi/ssif_bmc.c @@ -87,6 +87,7 @@ struct ssif_bmc_ctx { /* Timeout waiting for response */ struct timer_list response_timer; bool response_timer_inited; + u32 response_timeout; /* Flag to identify a Multi-part Read Transaction */ bool is_singlepart_read; u8 nbytes_processed; @@ -331,7 +332,8 @@ static void handle_request(struct ssif_bmc_ctx *ssif_bm= c) timer_setup(&ssif_bmc->response_timer, response_timeout, 0); ssif_bmc->response_timer_inited =3D true; } - mod_timer(&ssif_bmc->response_timer, jiffies + msecs_to_jiffies(RESPONSE_= TIMEOUT)); + mod_timer(&ssif_bmc->response_timer, jiffies + + msecs_to_jiffies(ssif_bmc->response_timeout)); } =20 static void calculate_response_part_pec(struct ssif_part_buffer *part) @@ -809,6 +811,10 @@ static int ssif_bmc_probe(struct i2c_client *client) if (!ssif_bmc) return -ENOMEM; =20 + if (of_property_read_u32(client->dev.of_node, "timeout-ms", + &ssif_bmc->response_timeout)) + ssif_bmc->response_timeout =3D RESPONSE_TIMEOUT; + spin_lock_init(&ssif_bmc->lock); =20 init_waitqueue_head(&ssif_bmc->wait_queue); --=20 2.31.1