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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3912bfdff57sm6719302f8f.37.2025.03.07.13.51.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 07 Mar 2025 13:51:43 -0800 (PST) Message-ID: Date: Fri, 7 Mar 2025 22:51:42 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] rust: pl011: Allow NULL chardev argument to pl011_create() To: Peter Maydell , qemu-devel@nongnu.org Cc: qemu-rust@nongnu.org, Paolo Bonzini , Kevin Wolf , Zhao Liu References: <20250307190051.3274226-1-peter.maydell@linaro.org> Content-Language: en-US From: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= In-Reply-To: <20250307190051.3274226-1-peter.maydell@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::32e; envelope-from=philmd@linaro.org; helo=mail-wm1-x32e.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, 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 autolearn=ham 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 7/3/25 20:00, Peter Maydell wrote: > It's valid for the caller to pass a NULL chardev to pl011_create(); > this means "don't set the chardev property on the device", which > in turn means "act like there's no chardev". All the chardev > frontend APIs (in C, at least) accept a NULL pointer to mean > "do nothing". > > This fixes some failures in 'make check-functional' when Rust support > is enabled. > > Signed-off-by: Peter Maydell > --- > This is my first Rust related patch for QEMU, so I've > probably got something wrong here :-) > --- > rust/hw/char/pl011/src/device.rs | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs > index d0857b470c9..8098f762f4b 100644 > --- a/rust/hw/char/pl011/src/device.rs > +++ b/rust/hw/char/pl011/src/device.rs > @@ -713,10 +713,12 @@ pub fn post_load(&self, _version_id: u32) -> Result<(), ()> { > // SAFETY: The callers promise that they have owned references. > // They do not gift them to pl011_create, so use `Owned::from`. > let irq = unsafe { Owned::::from(&*irq) }; > - let chr = unsafe { Owned::::from(&*chr) }; > > let dev = PL011State::new(); > - dev.prop_set_chr("chardev", &chr); > + if !chr.is_null() { > + let chr = unsafe { Owned::::from(&*chr) }; > + dev.prop_set_chr("chardev", &chr); > + } > dev.sysbus_realize(); > dev.mmio_map(0, addr); > dev.connect_irq(0, &irq); Reviewed-by: Philippe Mathieu-Daudé