From patchwork Thu Jun 27 15:59:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: TJ Adams X-Patchwork-Id: 13714747 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 902DD1386BF for ; Thu, 27 Jun 2024 16:00:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719504046; cv=none; b=aCunjHsVdGtSNlhUmRgxPHAVA/9O3Z1Hb97H68m+11qwJkNFbC/Oi8pQ/CglMjSJM1gf17xI1Vpn6AZt+lUIBIf0Oa5NUKYiUr/f6huBDi3DN2HFVbvRv9kSeqDQkY/OlT2u3QBdbwkkgQHy5+BU+UGzywZ+deOYnI/NIw5Pla8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719504046; c=relaxed/simple; bh=WDaNMzqPAnqi/u+RFCDIImLuvAlHk1efK+xDKhaieBI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=VyniABgN2QBhXflISk6wXaj6cGHUsFAFA8u+JcissBnDHNQWdpdQCq4LQqua+1CVEjzZjsGHMPIFlo+6cML2vA2Ztevdly2IBDb6QzxqOXxe7WpyQEGD9ORE/CdYrFCGm2zDHTKvKjmlIV1qzMIfYsNXcsllqDuqvbNUi5MBWw8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--tadamsjr.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=oXyE/BZn; arc=none smtp.client-ip=209.85.128.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--tadamsjr.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="oXyE/BZn" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6485051924fso35402017b3.1 for ; Thu, 27 Jun 2024 09:00:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1719504043; x=1720108843; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=INzVQfOcOyw0MPWfDO8THA5WvTmxm42HTaXMhSU67yI=; b=oXyE/BZna6lKoZMe7WtAZTJbTveNSKOm/c2TgsEu3l6Eugobo9U043DntkHV7o9UnG 1JBDPVZ45EhBGB6aVT6/rwmJlTDfVSwuR+Gj6IVnx7cHQdJsaTMOWXJuRD2K30cFHGlB ZpXGsyWuUwWZi6/9Qc/i1VrA6pNlcg5k8UWCRQ9aPbwOmklNNlwo/zr0dtNwT9Oh+Su8 o5D3AtbWl+uxSrs21RuOjpoDndBbvnfNwyCamW5skVCRmfrbWfn2w4Qq7vciWD/QM/l4 V6gEQAg1PeTdSeMQep0ubjHgbuB+c4hpdHwCNkCnVTTKa92NpSw10iJOp3uo5e/8Jtwa xI8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719504043; x=1720108843; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=INzVQfOcOyw0MPWfDO8THA5WvTmxm42HTaXMhSU67yI=; b=ggQKfJscAULQHRzDurp9n4VmyTuSS68G06E2IRvBZQJ4zHR/z+JjAR+JxYcWpa3s0X 4HpyGeJSnj/bRqg9a1m2wn/khVxX5swfmvgb8ImBHYfjFi9QWb4s14c6vr7A3IJeR1jI KDXqhOOugm8P05EJyDM8VxAHn3OWUHIG244JzgNQnsKqoBasw4BnYizNEoQftrbO36Sx 7pkGtyUobcfJgpgt1Fd/hIWXUxxLgrDr3Jf6borGd9hlOKCnF5ZzNdmMinYjh6uDNZ1a Pj+eR5bi21gZNoRQGX0XUBsBAl1mzs8DzcnDRvbCdLZi/uN9x0md4BH1/quXtyXvkX2p iUfw== X-Gm-Message-State: AOJu0YxxCXHjzhlkkpdUvVFff14J+yiettN2ZTkwg/0e4VBO069HLqh9 7NtJF3uWmRurB+3NPIQR/C907tmXg9FQwch2huv5vazjoyxagpNx82A+MClvxdrgDqTNPdGRL5z EYtb0CFTOFg== X-Google-Smtp-Source: AGHT+IHfPPeti93pMs6W3uQWXmwfASWg/OmdR++s3AodAbpKZKaM1TqDW6jcYi8RtSqHCe7HJ2lZKrNynSZxGg== X-Received: from tadamsjr.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:177c]) (user=tadamsjr job=sendgmr) by 2002:a05:690c:60c7:b0:61b:791a:9850 with SMTP id 00721157ae682-645cfddf3a6mr6375587b3.9.1719504043514; Thu, 27 Jun 2024 09:00:43 -0700 (PDT) Date: Thu, 27 Jun 2024 15:59:23 +0000 In-Reply-To: <20240627155924.2361370-1-tadamsjr@google.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240627155924.2361370-1-tadamsjr@google.com> X-Mailer: git-send-email 2.45.2.741.gdbec12cfda-goog Message-ID: <20240627155924.2361370-2-tadamsjr@google.com> Subject: [PATCH v2 1/2] scsi: pm80xx: Set phy->enable_completion only when we wait for it From: TJ Adams To: Jack Wang , "James E . J . Bottomley" , "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Igor Pylypiv , Terrence Adams , Jack Wang From: Igor Pylypiv pm8001_phy_control() populates the enable_completion pointer with a stack address, sends a PHY_LINK_RESET / PHY_HARD_RESET, waits 300 ms, and returns. The problem arises when a phy control response comes late. After 300 ms the pm8001_phy_control() function returns and the passed enable_completion stack address is no longer valid. Late phy control response invokes complete() on a dangling enable_completion pointer which leads to a kernel crash. Signed-off-by: Igor Pylypiv Signed-off-by: Terrence Adams Acked-by: Jack Wang --- drivers/scsi/pm8001/pm8001_sas.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index a5a31dfa4512..ee2da8e49d4c 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -166,7 +166,6 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, unsigned long flags; pm8001_ha = sas_phy->ha->lldd_ha; phy = &pm8001_ha->phy[phy_id]; - pm8001_ha->phy[phy_id].enable_completion = &completion; if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) { /* @@ -190,6 +189,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, rates->maximum_linkrate; } if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } @@ -198,6 +198,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, break; case PHY_FUNC_HARD_RESET: if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } @@ -206,6 +207,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, break; case PHY_FUNC_LINK_RESET: if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } From patchwork Thu Jun 27 15:59:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: TJ Adams X-Patchwork-Id: 13714748 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B167196D9A for ; 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Thu, 27 Jun 2024 09:00:45 -0700 (PDT) Date: Thu, 27 Jun 2024 15:59:24 +0000 In-Reply-To: <20240627155924.2361370-1-tadamsjr@google.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240627155924.2361370-1-tadamsjr@google.com> X-Mailer: git-send-email 2.45.2.741.gdbec12cfda-goog Message-ID: <20240627155924.2361370-3-tadamsjr@google.com> Subject: [PATCH v2 2/2] scsi: pm8001: Update log level when reading config table From: TJ Adams To: Jack Wang , "James E . J . Bottomley" , "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Igor Pylypiv , Terrence Adams , Jack Wang From: Terrence Adams Reading the main config table occurs as a part of initialization in pm80xx_chip_init(). Because of this it makes more sense to have it be a part of the INIT logging. Signed-off-by: Terrence Adams Acked-by: Jack Wang --- drivers/scsi/pm8001/pm80xx_hwi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c index a52ae6841939..8fe886dc5e47 100644 --- a/drivers/scsi/pm8001/pm80xx_hwi.c +++ b/drivers/scsi/pm8001/pm80xx_hwi.c @@ -568,13 +568,13 @@ static void read_main_config_table(struct pm8001_hba_info *pm8001_ha) pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version = pm8001_mr32(address, MAIN_MPI_INACTIVE_FW_VERSION); - pm8001_dbg(pm8001_ha, DEV, + pm8001_dbg(pm8001_ha, INIT, "Main cfg table: sign:%x interface rev:%x fw_rev:%x\n", pm8001_ha->main_cfg_tbl.pm80xx_tbl.signature, pm8001_ha->main_cfg_tbl.pm80xx_tbl.interface_rev, pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev); - pm8001_dbg(pm8001_ha, DEV, + pm8001_dbg(pm8001_ha, INIT, "table offset: gst:%x iq:%x oq:%x int vec:%x phy attr:%x\n", pm8001_ha->main_cfg_tbl.pm80xx_tbl.gst_offset, pm8001_ha->main_cfg_tbl.pm80xx_tbl.inbound_queue_offset, @@ -582,7 +582,7 @@ static void read_main_config_table(struct pm8001_hba_info *pm8001_ha) pm8001_ha->main_cfg_tbl.pm80xx_tbl.int_vec_table_offset, pm8001_ha->main_cfg_tbl.pm80xx_tbl.phy_attr_table_offset); - pm8001_dbg(pm8001_ha, DEV, + pm8001_dbg(pm8001_ha, INIT, "Main cfg table; ila rev:%x Inactive fw rev:%x\n", pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version, pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version);