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[98.183.112.25]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-2971d5e2fa6sm2314970fac.20.2024.11.24.10.01.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 24 Nov 2024 10:01:24 -0800 (PST) Message-ID: <22bc45a0-9d14-480a-bcce-bae394166967@baylibre.com> Date: Sun, 24 Nov 2024 12:01:23 -0600 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 01/16] spi: add basic support for SPI offloading To: Jonathan Cameron Cc: Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , =?UTF-8?Q?Nuno_S=C3=A1?= , =?UTF-8?Q?Uwe_Kleine-K=C3=B6nig?= , Michael Hennerich , Lars-Peter Clausen , David Jander , Martin Sperl , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-pwm@vger.kernel.org References: <20241115-dlech-mainline-spi-engine-offload-2-v5-0-bea815bd5ea5@baylibre.com> <20241115-dlech-mainline-spi-engine-offload-2-v5-1-bea815bd5ea5@baylibre.com> <20241124163241.4699161f@jic23-huawei> Content-Language: en-US From: David Lechner In-Reply-To: <20241124163241.4699161f@jic23-huawei> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/24/24 10:32 AM, Jonathan Cameron wrote: > On Fri, 15 Nov 2024 14:18:40 -0600 > David Lechner wrote: > >> Add the basic infrastructure to support SPI offload providers and >> consumers. >> ... >> + resource = kzalloc(sizeof(*resource), GFP_KERNEL); >> + if (!resource) >> + return ERR_PTR(-ENOMEM); >> + >> + resource->controller = spi->controller; >> + resource->offload = spi->controller->get_offload(spi, config); >> + ret = PTR_ERR_OR_ZERO(resource->offload); >> + if (ret) { > Why not simply > if (IS_ERR(resource->offload) { > kfree(resource); > return resource->offload; > } >> + kfree(resource); >> + return ERR_PTR(ret); >> + } Hmm... maybe somewhere along the way ret was being checked again after this, but doesn't to be the case anymore. >> + >> + ret = devm_add_action_or_reset(dev, spi_offload_put, resource); >> + if (ret) >> + return ERR_PTR(ret); >> + >> + return resource->offload; >> +} >> +EXPORT_SYMBOL_GPL(devm_spi_offload_get); > >> diff --git a/include/linux/spi/spi-offload.h b/include/linux/spi/spi-offload.h >> new file mode 100644 >> index 000000000000..81b115fc89bf >> --- /dev/null >> +++ b/include/linux/spi/spi-offload.h > >> + >> +MODULE_IMPORT_NS(SPI_OFFLOAD); > > This is rarely done in headers. (only pwm.h does it I think) > I'd push it down into code that uses this. Yes, it was Uwe that suggested that I put it in the header. :-) Are there any unwanted side effects of having it in the header? > > It might be worth splitting the header into a spi-offload-provider.h > and spi-offload-consumer.h with a common spi-offload-types.h included > by both. >