From patchwork Fri Nov 15 16:20:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Kai_M=C3=A4kisara?= X-Patchwork-Id: 843753 Received: from fgw23-4.mail.saunalahti.fi (fgw23-4.mail.saunalahti.fi [62.142.5.110]) (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 450F71D47B4 for ; Fri, 15 Nov 2024 16:20:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.142.5.110 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731687647; cv=none; b=mxRqB9FMBiaDtdeKu8rmRSxGT68G1XHOkNdEgHGozk/WN+y9Ehy79h2jXvTbJ9dUldUBGgZN35gIgl1+IFVqjMW9PGzpXHekC7OdEduCExl6A7uAU34g4772yH+XZ5sPpmBhoY9c9FPs8cSQBsAnVLFMjhw3iBeEG/zKh8VG3f8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731687647; c=relaxed/simple; bh=CHv7/4lMmHuSaimORnAiT68tZsIPzy3UBDk0gsqA+Rc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=A0tfwh9iM6g1wosYjevrKMZR91xpGfyUACjr6DOe7T7ndZanK6zppJBX9WQqcHWR6rao2bOBuY1WSNJdKtjDwlv7KoTGh2hZuLtfW4AiBD9x6CfSS9vrtdDANaCEvCJdrH8TBH/I1A5s2O8VywtDnnsMvl3bJSncTr+P+8LYL0U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=kolumbus.fi; spf=pass smtp.mailfrom=kolumbus.fi; dkim=pass (2048-bit key) header.d=kolumbus.fi header.i=@kolumbus.fi header.b=BNyelQQ8; arc=none smtp.client-ip=62.142.5.110 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=kolumbus.fi Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kolumbus.fi Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kolumbus.fi header.i=@kolumbus.fi header.b="BNyelQQ8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kolumbus.fi; s=elisa1; h=content-transfer-encoding:content-type:mime-version:references:in-reply-to: message-id:date:subject:cc:to:from:from:to:cc:reply-to:subject:date: in-reply-to:references:list-archive:list-subscribe:list-unsubscribe: content-type:content-transfer-encoding:message-id; bh=hx5TYMwxtgIqdQrP/af/RYP7Oyzzfp7c8/OQ9LlbdtQ=; b=BNyelQQ8ui9xOqQ1n9hjQSFriGQhgsAzDmge0VGcKO7jx6LCKf9XI9Cgg0Ka9DUYk3I7CIIUysb0T eHsL2r8/8ufbU1UQrLk8xE5k9xnwTlML0FgdHfhXdyzt3IYOzxPQvStuaW/F8g3W9s4sv22BZCALhA RTOH+ao+FoOA5Xhk8rb71Ut5t3GeQun0k4+ur4tCuufeVEmVryVZlVU/qzgbLUY9QODiU45A8TU+gq 7HVK6Wla4cWqZNk7zmQGpD0JdBkRx7p3GSL1LeJzBb7P9EwgKIeIRpNc2Y+6dbKqjfpHKzko+yOgo4 uEXsOplR6dg0Fo2v4vqTxBqMeNmEmsQ== Received: from kaipn1.makisara.private (85-156-116-90.elisa-laajakaista.fi [85.156.116.90]) by fgw20.mail.saunalahti.fi (Halon) with ESMTPSA id 8f46f045-a36d-11ef-9b34-005056bd6ce9; Fri, 15 Nov 2024 18:20:42 +0200 (EET) From: =?utf-8?q?Kai_M=C3=A4kisara?= To: linux-scsi@vger.kernel.org, jmeneghi@redhat.com Cc: martin.petersen@oracle.com, James.Bottomley@HansenPartnership.com, loberman@redhat.com, =?utf-8?q?Kai_M=C3=A4kisara?= Subject: [PATCH 1/2] scsi: st: Remove use of device->was_reset Date: Fri, 15 Nov 2024 18:20:02 +0200 Message-ID: <20241115162003.3908-2-Kai.Makisara@kolumbus.fi> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241115162003.3908-1-Kai.Makisara@kolumbus.fi> References: <20241115162003.3908-1-Kai.Makisara@kolumbus.fi> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Don't use the was_reset flag set by scsi error handling. It is enough to recognize device resets based in the UNIT ATTENTION sense data. (The retry counts are zero and either REQ_OP_DRV_OUT or REC_OP_DRV_IN are used to prevent retries by midlevel.) Signed-off-by: Kai Mäkisara --- drivers/scsi/st.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index e8ef27d7ef61..3acaa3561c81 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -163,9 +163,11 @@ static const char *st_formats[] = { static int debugging = DEBUG; +/* Setting these non-zero may risk recognizing resets */ #define MAX_RETRIES 0 #define MAX_WRITE_RETRIES 0 #define MAX_READY_RETRIES 0 + #define NO_TAPE NOT_READY #define ST_TIMEOUT (900 * HZ) @@ -413,10 +415,11 @@ static int st_chk_result(struct scsi_tape *STp, struct st_request * SRpnt) if (cmdstatp->have_sense && cmdstatp->sense_hdr.asc == 0 && cmdstatp->sense_hdr.ascq == 0x17) STp->cleaning_req = 1; /* ASC and ASCQ => cleaning requested */ - if (cmdstatp->have_sense && scode == UNIT_ATTENTION && cmdstatp->sense_hdr.asc == 0x29) + if (cmdstatp->have_sense && scode == UNIT_ATTENTION && + cmdstatp->sense_hdr.asc == 0x29) { STp->pos_unknown = 1; /* ASC => power on / reset */ - - STp->pos_unknown |= STp->device->was_reset; + st_printk(KERN_WARNING, STp, "Power on/reset recognized."); + } if (cmdstatp->have_sense && scode == RECOVERED_ERROR @@ -3631,9 +3634,7 @@ static long st_ioctl(struct file *file, unsigned int cmd_in, unsigned long arg) retval = (-EIO); goto out; } - reset_state(STp); - /* remove this when the midlevel properly clears was_reset */ - STp->device->was_reset = 0; + reset_state(STp); /* Clears pos_unknown */ } if (mtc.mt_op != MTNOP && mtc.mt_op != MTSETBLK &&