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From: Sasha Levin <Alexander.Levin@microsoft.com>
To: "stable@vger.kernel.org" <stable@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.18 47/92] coresight: Handle errors in finding input/output ports
Date: Sat, 15 Sep 2018 01:30:22 +0000	[thread overview]
Message-ID: <20180915012944.179481-46-alexander.levin@microsoft.com> (raw)
In-Reply-To: <20180915012944.179481-1-alexander.levin@microsoft.com>

From: Suzuki K Poulose <suzuki.poulose@arm.com>

[ Upstream commit fe470f5f7f684ed15bc49b6183a64237547910ff ]

If we fail to find the input / output port for a LINK component
while enabling a path, we should fail gracefully rather than
assuming port "0".

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/hwtracing/coresight/coresight.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 29e834aab539..b673718952f6 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -108,7 +108,7 @@ static int coresight_find_link_inport(struct coresight_device *csdev,
 	dev_err(&csdev->dev, "couldn't find inport, parent: %s, child: %s\n",
 		dev_name(&parent->dev), dev_name(&csdev->dev));
 
-	return 0;
+	return -ENODEV;
 }
 
 static int coresight_find_link_outport(struct coresight_device *csdev,
@@ -126,7 +126,7 @@ static int coresight_find_link_outport(struct coresight_device *csdev,
 	dev_err(&csdev->dev, "couldn't find outport, parent: %s, child: %s\n",
 		dev_name(&csdev->dev), dev_name(&child->dev));
 
-	return 0;
+	return -ENODEV;
 }
 
 static int coresight_enable_sink(struct coresight_device *csdev, u32 mode)
@@ -179,6 +179,9 @@ static int coresight_enable_link(struct coresight_device *csdev,
 	else
 		refport = 0;
 
+	if (refport < 0)
+		return refport;
+
 	if (atomic_inc_return(&csdev->refcnt[refport]) == 1) {
 		if (link_ops(csdev)->enable) {
 			ret = link_ops(csdev)->enable(csdev, inport, outport);
-- 
2.17.1

  parent reply	other threads:[~2018-09-15  1:49 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-15  1:29 [PATCH AUTOSEL 4.18 01/92] binfmt_elf: Respect error return from `regset->active' Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 02/92] net/mlx5: Add missing SET_DRIVER_VERSION command translation Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 03/92] arm64: dts: uniphier: Add missing cooling device properties for CPUs Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 04/92] audit: fix use-after-free in audit_add_watch Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 05/92] mtdchar: fix overflows in adjustment of `count` Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 06/92] vfs: fix freeze protection in mnt_want_write_file() for overlayfs Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 07/92] bpf: fix rcu annotations in compute_effective_progs() Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 08/92] spi: dw: fix possible race condition Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 10/92] mtd: rawnand: fscm: Avoid collision on PC def when compiling for MIPS Sasha Levin
2018-09-15 17:21   ` Miquel Raynal
2018-09-20  2:32     ` Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 09/92] Bluetooth: Use lock_sock_nested in bt_accept_enqueue Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 11/92] mtd: rawnand: sunxi: Add an U suffix to NFC_PAGE_OP definition Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 12/92] evm: Don't deadlock if a crypto algorithm is unavailable Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 13/92] KVM: PPC: Book3S HV: Add of_node_put() in success path Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 14/92] security: check for kstrdup() failure in lsm_append() Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 15/92] PM / devfreq: use put_device() instead of kfree() Sasha Levin
2018-09-15  1:29 ` [PATCH AUTOSEL 4.18 16/92] KVM: PPC: Book3S: Fix matching of hardware and emulated TCE tables Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 17/92] MIPS: loongson64: cs5536: Fix PCI_OHCI_INT_REG reads Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 18/92] configfs: fix registered group removal Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 19/92] pinctrl: mt7622: Fix probe fail by misuse the selector Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 20/92] pinctrl: rza1: Fix selector use for groups and functions Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 21/92] pinctrl: pinmux: Return selector to the pinctrl driver Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 22/92] arm64: dts: mt7622: update a clock property for UART0 Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 23/92] sched/core: Use smp_mb() in wake_woken_function() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 24/92] efi/esrt: Only call efi_mem_reserve() for boot services memory Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 25/92] net: hns3: Reset net device with rtnl_lock Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 26/92] net: hns3: Fix for reset_level default assignment probelm Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 27/92] ARM: hisi: handle of_iomap and fix missing of_node_put Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 28/92] ARM: hisi: fix error handling and " Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 29/92] net: hns3: Fix return value error in hns3_reset_notify_down_enet Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 31/92] liquidio: fix hang when re-binding VF host drv after running DPDK VF driver Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 30/92] ARM: hisi: check of_iomap and fix missing of_node_put Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 32/92] gpu: ipu-v3: csi: pass back mbus_code_to_bus_cfg error codes Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 33/92] ASoC: hdmi-codec: fix routing Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 34/92] gpiolib: don't allow userspace to set values of input lines Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 35/92] serial: 8250: of: Correct of_platform_serial_setup() error handling Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 36/92] tty: fix termios input-speed encoding when using BOTHER Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 37/92] tty: fix termios input-speed encoding Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 39/92] mmc: tegra: prevent HS200 on Tegra 3 Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 38/92] mmc: sdhci-of-esdhc: set proper dma mask for ls104x chips Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 40/92] mmc: sdhci: do not try to use 3.3V signaling if not supported Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 41/92] drm/nouveau: Fix runtime PM leak in drm_open() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 42/92] drm/nouveau/debugfs: Wake up GPU before doing any reclocking Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 43/92] drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 45/92] parport: sunbpp: fix error return code Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 46/92] sched/fair: Fix util_avg of new tasks for asymmetric systems Sasha Levin
2018-09-15  1:30 ` Sasha Levin [this message]
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 48/92] coresight: tpiu: Fix disabling timeouts Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 49/92] coresight: ETM: Add support for Arm Cortex-A73 and Cortex-A35 Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 50/92] f2fs: do checkpoint in kill_sb Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 51/92] tools/testing/nvdimm: Fix support for emulating controller temperature Sasha Levin
2018-09-15  1:34   ` Dan Williams
2018-09-15  1:40     ` Sasha Levin
2018-09-15  1:56       ` Dan Williams
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 52/92] drm/amd/display: support access ddc for mst branch Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 53/92] ASoC: qdsp6: q6afe-dai: fix a range check in of_q6afe_parse_dai_data() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 54/92] lightnvm: pblk: assume that chunks are closed on 1.2 devices Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 55/92] lightnvm: pblk: enable line minor version detection Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 57/92] gpio: pxa: Fix potential NULL dereference Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 56/92] staging: bcm2835-audio: Don't leak workqueue if open fails Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 58/92] gpiolib: Mark gpio_suffixes array with __maybe_unused Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 59/92] net: gemini: Allow multiple ports to instantiate Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 60/92] net: mvpp2: make sure we use single queue mode on PPv2.1 Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 61/92] rcutorture: Use monotonic timestamp for stall detection Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 62/92] mfd: 88pm860x-i2c: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT) Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 63/92] input: rohm_bu21023: " Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 64/92] rcu: Fix grace-period hangs due to race with CPU offline Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 65/92] drm/amdkfd: Fix kernel queue 64 bit doorbell offset calculation Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 66/92] drm/amdkfd: Fix error codes in kfd_get_process Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 67/92] rtc: bq4802: add error handling for devm_ioremap Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 68/92] selftests: vDSO - fix to return KSFT_SKIP when test couldn't be run Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 70/92] ALSA: pcm: Fix snd_interval_refine first/last with open min/max Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 69/92] selftests/android: initialize heap_type to avoid compiling warning Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 71/92] scsi: libfc: fixup 'sleeping function called from invalid context' Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 73/92] scsi: lpfc: Fix panic if driver unloaded when port is offline Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 72/92] scsi: lpfc: Fix NVME Target crash in defer rcv logic Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 74/92] remoteproc: qcom: q6v5-pil: fix modem hang on SDM845 after axis2 clk unvote Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 75/92] selftest: timers: Tweak raw_skew to SKIP when ADJ_OFFSET/other clock adjustments are in progress Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 76/92] ASoC: rt5651: Fix workqueue cancel vs irq free race on remove Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 77/92] drm/panel: type promotion bug in s6e8aa0_read_mtp_id() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 78/92] arm64: perf: Disable PMU while processing counter overflows Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 79/92] drm/amd/pp: Send khz clock values to DC for smu7/8 Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 80/92] dmaengine: hsu: Support dmaengine_terminate_sync() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 81/92] dmaengine: idma64: " Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 82/92] dmaengine: sh: rcar-dmac: avoid to write CHCR.TE to 1 if TCR is set to 0 Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 83/92] staging: fsl-dpaa2/eth: Fix DMA mapping direction Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 84/92] IB/nes: Fix a compiler warning Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 85/92] block/DAC960.c: fix defined but not used build warnings Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 86/92] IB/mlx5: fix uaccess beyond "count" in debugfs read/write handlers Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 87/92] blk-mq: only attempt to merge bio if there is rq in sw queue Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 88/92] blk-mq: avoid to synchronize rcu inside blk_cleanup_queue() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 89/92] gpiolib: Respect error code of ->get_direction() Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 90/92] pinctrl: msm: Fix msm_config_group_get() to be compliant Sasha Levin
2018-09-15  1:30 ` [PATCH AUTOSEL 4.18 91/92] pinctrl: qcom: spmi-gpio: Fix pmic_gpio_config_get() " Sasha Levin
2018-09-15  1:31 ` [PATCH AUTOSEL 4.18 92/92] clk: tegra: bpmp: Don't crash when a clock fails to register Sasha Levin

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