From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793237713; b=JnpkJFG8UcqLmnypfRAa1Fzxmbc3UOMCD0Q8jnkQ0UIrwdTLomdsYbdM0jvVmIsaz13c 11Gi0rs5iSA4O0BJkN49aBf4vgRvXRZb1Q04Esm+FQ8226kC0vrqgV3DSI15RAmV46UJI UrW6X2YzuDntKF1Dk4IxXx5OTr1ej7McuNOcAb4cgxXpO02Twvk506GpVc9jM5/er61G1 koTWgOkmHEeLiXvOmwO2IIhie2alld5AYq8li4160AAZONtNT77QYqydeaVaNmizfl0bz UjvdfY1HL3l+Iq6+3tx+MHnTu2IsySjh3nsaCLHInXwqUoW5QfQL2eNQGIazpfEVtTQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793237713; h=Received:DKIM-Signature:To:Cc:Subject:From:In-Reply-To:Message-ID: References:Date:MIME-Version:Content-Type; bh=YTQbPLZdljynDrxBo8DTmK6uAqdHD2fhUvpVN91xXPg=; b=pzpqueStFawYWzTVClebu28x2C/o1gME4eQko44YlXqTRLONxsTxB6pfiBxAbRh5Vq3W VFFtYHnjtCeZWaD2BtlhDotK4e11ZyT2B8HMx74gKtzsPbjtIwKOfRz9A/M1B53ASC50s qm0Jj87Msy5CHJbDVxR6vZg6LlZ+NUVxBiJ0BFWtEjFbMEnlxunUuGdvCfcarbrPcmcto AY13trT4DsZo9zB/r/vdq+jynLB9rsQJYSEdakIrwbT79FAfWyTdKLyun0bdRW2SuLzMV lAsTR4q/etgnxno06KjcAMS0XpIf6UJv3fLS3y/oPKTFMEcxG2LlvTgjgscEhlPENTA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=hvUkdLWo; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D92A7606A31A for ; Thu, 29 Oct 2026 01:35:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=hvUkdLWo Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26CD11F01825; Thu, 29 Oct 2026 01:35:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793237712; bh=YTQbPLZdljynDrxBo8DTmK6uAqdHD2fhUvpVN91xXPg=; h=To:Cc:Subject:From:In-Reply-To:References:Date; b=hvUkdLWo8XlAtMy4FDOfOhvbl6UnwFFsLMQjIxg8nJeKwq5Tetlxfem1ydIE0zh// mbvUulHQtb9O1SO7UZKHXFnfbPXk9ByvcmkuQndtfneas52CJyjaPDooNAyApM+f1L gGmoT4xvFoP9A1WumPZ7DnPY2AMqrXSxJ7DJcsi63ZoRQ7xFZsK3QVKxQsbbp6Tfvy Slaf3g+6x+p5nNn+hYdO/WcqBudYxHC7TrEeE7EqCCpIGpdZ2vNnMenmUnGkh0NBqk 0FxM2xtwjet4LntW7nI0eg72lBQvplfUXVhFfMr2jnjRVKPqWF7NxTndEjzenpu8BP E4X+pNsWc+Urw== To: Matthew Whitehead Cc: linux-scsi@vger.kernel.org, mkp@kernel.org, James.Bottomley@hansenpartnership.com, loberman@redhat.com, emilne@redhat.com Subject: Re: [PATCH] scsi: aha1542: Remove unneeded scsi_dma_unmap() call From: "Martin K. Petersen" In-Reply-To: <20260929144528.7061-1-tedheadster@gmail.com> Message-ID: References: <20260929144528.7061-1-tedheadster@gmail.com> Date: Wed, 28 Oct 2026 21:35:11 -0400 X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain Matthew, > aha1542 never DMA maps the command's scatterlist. Data is bounced > through a per-command buffer allocated with dma_alloc_coherent() in > aha1542_init_cmd_priv(), the adapter is programmed with > acmd->data_buffer_handle, and the payload is copied to and from the > request segments in aha1542_queuecommand() and aha1542_free_cmd(). Applied to 7.4/scsi-staging, thanks! -- Martin K. Petersen