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Wed, 7 Oct 2026 07:56:26 -0400 From: Jonathan Santos To: , CC: Jonathan Santos , , , , , , Subject: [PATCH v3 0/2] spi: axi-spi-engine: fix stale SYNC IRQ pending Date: Wed, 7 Oct 2026 05:52:05 -0300 Message-ID: X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: TwynuX7hgpfUHTe9wO3FpTN1OWP72HLZ X-Authority-Analysis: v=2.4 cv=N/S8hG9B c=1 sm=1 tr=0 ts=6ac63386 cx=c_pps a=PpDZqlmH/M8setHirZLBMw==:117 a=PpDZqlmH/M8setHirZLBMw==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=uXIjobp8t2wMuQ0fPvqm:22 a=VwQbUJbxAAAA:8 a=gAnH3GRIAAAA:8 a=3EvmjnR45BohH-wPFtUA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDA3MDA0NyBTYWx0ZWRfX6GxZ5A+jodFv Z43D1z0A6kWO5EHJUV3uvZm5GYiXn0i9dzUPiSmZWnCMnR5FDsp9nVkyL/4Sm9Iv+3PVSUWhFGe F9cME+B/IYtzktQtAqU99uUmqzrVbj2WR+SbxMzg7HgQWPmqGzHapE6q5dGvTPNXHSmGLQW3xHt 8PBfzdb11gM9oxBlji/IAMDChsa8oGl7KVaFu56CjcS9eaVkMmIbGM+a4wGZ6xa7pPydITifKDy XuvqBt1PtxZ3EECKQqwkKprxJS0BPQ6OBKQX4Q4ayft7ZNG7zteQuEbsjfBNrMuMwswCL6h0P2B 9UGDIr6QUkeelDLb7W1We73LzRbPZO89RqKGVdiFvN3Og+ZP3obZ2to459Iy2Lv5GuBJOuxO5YF DhzTfxKA0+f7kPfxsLNo1njjEvXtYB0y8lwAwgTK9SnN5RZMZTkfQHFYyudrITb5ErjgWwxWmmD eopNv7m53HuVcE8xJ5Q== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDA3MDA0NyBTYWx0ZWRfX/dgRcx8bfNeP McCf+O78c+mBYmTO1NTLRKVmRFR78KF/oraxind3ALT5M5vZt0LFPEYpZafeNrO+8h9kc3+xjF6 zcaFs3MHulMqy1N9tcVlup0Ytbvtum2MHGnjGMlA7t5lBL6KK3UK X-Proofpoint-GUID: TwynuX7hgpfUHTe9wO3FpTN1OWP72HLZ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-07_04,2026-10-06_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 priorityscore=1501 spamscore=0 suspectscore=0 clxscore=1011 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2610070047 Both spi_engine_setup() and spi_engine_trigger_enable() send a SYNC(1) command and poll SYNC_ID, but never clear INT_PENDING[SYNC] afterward. This leaves a stale pending bit that fires spuriously when INT_SYNC is enabled later by some driver, causing premature transfer completion at low SPI clock frequencies (more likely). Fix both functions by clearing the pending bit after polling. v3 summary: * Added a dummy read after the clear command to flush the posted writes before dropping the lock. * Link to v2: https://lore.kernel.org/linux-spi/cover.1790731588.git.Jonathan.Santos@analog.com/T/#t v2 summary: * Replaced "Link" tag for "Closes" tag. * Included "Fixes" tag. * Added new patch applying similar fix for the spi_engine_trigger_enable(), as pointed out by David. * While at it, replaced plain "1000" by "1 * USEC_PER_MSEC" for better clarity. * Link to v1: https://lore.kernel.org/linux-spi/04d51e99b8cddce51113db933d806e83848f04f5.1788313558.git.Jonathan.Santos@analog.com/T/#t Jonathan Santos (2): spi: axi-spi-engine: fix stale SYNC IRQ pending spi: axi-spi-engine: fix stale SYNC IRQ pending in trigger_enable drivers/spi/spi-axi-spi-engine.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) base-commit: 04434a1d0f311d76b1f15fa987918b471a0b8c6a -- 2.34.1