From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9D2553ACF16; Wed, 8 Apr 2026 18:34:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775673243; cv=none; b=HsUfRt0ppKw9EpN+5YMmwFurAcejWu04ZSKp2zBl9Cy+Vn3ajLfTlVh8UWuGR4gKBvZBaGGnwtuCz6T4GpFi6wi1tUDnG93NX2B8L62bFaOioHk/fjHhljVUwRqWcxNAQQCn2QB3CmtoVaC8CqNcmeIWTdI3nS86HYETArvCLT4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775673243; c=relaxed/simple; bh=XdvGTwcoAe4YN7jZQVa2OqDJdTj4SMitJuPioAH5l8c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=G17dIWwBhdiHlQsSmsk8TDusbj0vbrafTr6dx3EruRz6XvY/lPzSHE1ii8Eh+FSLuIbdOhGrG/gYA4XGT8wQAETfNCEX5YhlVEZEXFhzFz2e95GeVBe40BIH4Fc5YA4SwH5qTs4ZBF3GfUuRAkcLDHnWsXpA4F3ITNSvkQAUC4w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=gKI5AzZZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="gKI5AzZZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33D89C19421; Wed, 8 Apr 2026 18:34:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1775673243; bh=XdvGTwcoAe4YN7jZQVa2OqDJdTj4SMitJuPioAH5l8c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gKI5AzZZgff0wmP0gyOAg6XfMQfnhl92zzyi5hEsRFFxB86GsRuRtB891KlUITZqm 6DbWaNe1JlMeN2Dy5yYnRNdchjFd6ig4EhkOLaxJ8YeUAM5toBPd2/YgsfkMWN+6uX M3rCsyJ/xKkaItA/g6IAPDX7Sh49JoxqiElfRc8w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, David Lechner , Andy Shevchenko , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 6.18 157/277] iio: adc: ti-adc161s626: use DMA-safe memory for spi_read() Date: Wed, 8 Apr 2026 20:02:22 +0200 Message-ID: <20260408175939.733456922@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260408175933.836769063@linuxfoundation.org> References: <20260408175933.836769063@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Lechner commit 768461517a28d80fe81ea4d5d03a90cd184ea6ad upstream. Add a DMA-safe buffer and use it for spi_read() instead of a stack memory. All SPI buffers must be DMA-safe. Since we only need up to 3 bytes, we just use a u8[] instead of __be16 and __be32 and change the conversion functions appropriately. Fixes: 4d671b71beef ("iio: adc: ti-adc161s626: add support for TI 1-channel differential ADCs") Signed-off-by: David Lechner Reviewed-by: Andy Shevchenko Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/adc/ti-adc161s626.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) --- a/drivers/iio/adc/ti-adc161s626.c +++ b/drivers/iio/adc/ti-adc161s626.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -70,6 +71,7 @@ struct ti_adc_data { u8 read_size; u8 shift; + u8 buf[3] __aligned(IIO_DMA_MINALIGN); }; static int ti_adc_read_measurement(struct ti_adc_data *data, @@ -78,26 +80,20 @@ static int ti_adc_read_measurement(struc int ret; switch (data->read_size) { - case 2: { - __be16 buf; - - ret = spi_read(data->spi, (void *) &buf, 2); + case 2: + ret = spi_read(data->spi, data->buf, 2); if (ret) return ret; - *val = be16_to_cpu(buf); + *val = get_unaligned_be16(data->buf); break; - } - case 3: { - __be32 buf; - - ret = spi_read(data->spi, (void *) &buf, 3); + case 3: + ret = spi_read(data->spi, data->buf, 3); if (ret) return ret; - *val = be32_to_cpu(buf) >> 8; + *val = get_unaligned_be24(data->buf); break; - } default: return -EINVAL; }