From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 CB565559CB5 for ; Tue, 8 Sep 2026 13:37:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788874629; cv=none; b=dSXAA4dMDo1uvRKySfoJewU7iPU+daf0D3gt3uM3Dg/wbIirqbcOf+7v6J9Ofuf3xtK6KIXpoABCbhH2UNhYxMQcENdx1zEmivX0yJCXFL0HY+5T2iBurPm40oJerNBTWPwQh03LqQ55HvWHEHafOsYBH9JbSGZn7l+YdhXAPpM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788874629; c=relaxed/simple; bh=+ZP4Xk9m45f7o8oEyRqGg0CmVpNp8D8MeoJ4QsfzcwE=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=m0OYWOvtQjl4YDNqwCSgxLeWniz1dbRX7EeGbdunJI3c2ytz1SBdEzyDmJJSJp53P56tbZMq1tRh4jY+Y7ovYG9Pgw9vgt7Hx6BIz5kLLz1dM8PHJK9GDaz3w/2X25+r8mdl6koEwH4xaMRzQGc94Qe1LBDKzymREb7prAFrfII= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 72E251F00A3F; Tue, 8 Sep 2026 13:37:02 +0000 (UTC) Subject: FAILED: patch "[PATCH] irqchip/stm32mp-exti: Fix the unit of the hwspinlock timeout" failed to apply to 5.15-stable tree To: junan76@163.com,antonio.borneo@foss.st.com,radu@rendec.net,tglx@kernel.org Cc: From: Date: Tue, 08 Sep 2026 15:31:13 +0200 Message-ID: <2026090813-gallery-jackpot-25e8@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x d31fbbade43f880b7e59e2b3a72722fe2725d93f # git commit -s git send-email --to '' --in-reply-to '2026090813-gallery-jackpot-25e8@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From d31fbbade43f880b7e59e2b3a72722fe2725d93f Mon Sep 17 00:00:00 2001 From: Ju Nan Date: Fri, 21 Aug 2026 10:47:57 +0800 Subject: [PATCH] irqchip/stm32mp-exti: Fix the unit of the hwspinlock timeout HWSPNLCK_TIMEOUT is passed to hwspin_lock_timeout_in_atomic(), whose timeout argument is in milliseconds, not microseconds: atomic_delay += HWSPINLOCK_RETRY_DELAY_US; if (atomic_delay > to * 1000) return -ETIMEDOUT; So stm32mp_exti_set_type() asks for a 1 second timeout where the comment next to the macro says it wants 1 millisecond. The semaphore is polled with udelay() from a section that holds chip_data->rlock, a raw_spinlock_t, so preemption stays disabled for the whole wait on every configuration, PREEMPT_RT included. The hwspinlock core documents this explicitly: If the mode is HWLOCK_IN_ATOMIC (called from an atomic context) the timeout is handled with busy-waiting delays, hence shall not exceed few msecs. Fixes: 5257169ade8c ("irqchip/stm32-exti: Use the hwspin_lock_timeout_in_atomic() API") Signed-off-by: Ju Nan Signed-off-by: Thomas Gleixner Reviewed-by: Radu Rendec Reviewed-by: Antonio Borneo Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260821024756.24927-2-junan76@163.com diff --git a/drivers/irqchip/irq-stm32mp-exti.c b/drivers/irqchip/irq-stm32mp-exti.c index bf3a2def69ca..a19e91fbd010 100644 --- a/drivers/irqchip/irq-stm32mp-exti.c +++ b/drivers/irqchip/irq-stm32mp-exti.c @@ -22,7 +22,7 @@ #define IRQS_PER_BANK 32 -#define HWSPNLCK_TIMEOUT 1000 /* usec */ +#define HWSPNLCK_TIMEOUT_MS 1 #define EXTI_EnCIDCFGR(n) (0x180 + (n) * 4) #define EXTI_HWCFGR1 0x3f0 @@ -376,7 +376,7 @@ static int stm32mp_exti_set_type(struct irq_data *d, unsigned int type) raw_spin_lock(&chip_data->rlock); if (hwlock) { - err = hwspin_lock_timeout_in_atomic(hwlock, HWSPNLCK_TIMEOUT); + err = hwspin_lock_timeout_in_atomic(hwlock, HWSPNLCK_TIMEOUT_MS); if (err) { pr_err("%s can't get hwspinlock (%d)\n", __func__, err); goto unlock;