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Thu, 14 Jul 2022 11:28:00 -0700 (PDT) Date: Thu, 14 Jul 2022 11:27:40 -0700 In-Reply-To: <20220714182756.85664-1-wuhaotsh@google.com> Message-Id: <20220714182756.85664-2-wuhaotsh@google.com> Mime-Version: 1.0 References: <20220714182756.85664-1-wuhaotsh@google.com> X-Mailer: git-send-email 2.37.0.170.g444d1eabd0-goog Subject: [PATCH 1/8] hw/i2c: Clear ACK bit in NPCM7xx SMBus module From: Hao Wu To: peter.maydell@linaro.org Cc: richard.henderson@linaro.org, qemu-arm@nongnu.org, qemu-devel@nongnu.org, wuhaotsh@google.com, venture@google.com, Avi.Fishman@nuvoton.com, kfting@nuvoton.com, hskinnemoen@google.com, f4bug@amsat.org, bin.meng@windriver.com, qemu-block@nongnu.org, armbru@redhat.com, thuth@redhat.com, Titus Rwantare Received-SPF: pass client-ip=2607:f8b0:4864:20::449; envelope-from=3MGDQYggKCk8DByr5A9yx55x2v.t537v3B-uvCv2454x4B.58x@flex--wuhaotsh.bounces.google.com; helo=mail-pf1-x449.google.com X-Spam_score_int: -95 X-Spam_score: -9.6 X-Spam_bar: --------- X-Spam_report: (-9.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, USER_IN_DEF_DKIM_WL=-7.5 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The ACK bit in NPCM7XX SMBus module should be cleared each time it sends out a NACK signal. This patch fixes the bug that it fails to do so. Signed-off-by: Hao Wu Reviewed-by: Titus Rwantare Reviewed-by: Peter Maydell --- hw/i2c/npcm7xx_smbus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/i2c/npcm7xx_smbus.c b/hw/i2c/npcm7xx_smbus.c index e7e0ba66fe..f18e311556 100644 --- a/hw/i2c/npcm7xx_smbus.c +++ b/hw/i2c/npcm7xx_smbus.c @@ -270,7 +270,7 @@ static void npcm7xx_smbus_recv_byte(NPCM7xxSMBusState *s) if (s->st & NPCM7XX_SMBCTL1_ACK) { trace_npcm7xx_smbus_nack(DEVICE(s)->canonical_path); i2c_nack(s->bus); - s->st &= NPCM7XX_SMBCTL1_ACK; + s->st &= ~NPCM7XX_SMBCTL1_ACK; } trace_npcm7xx_smbus_recv_byte((DEVICE(s)->canonical_path), s->sda); npcm7xx_smbus_update_irq(s);