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R. Silva" , Haotian Zhang , Tony Lindgren , Russell King , linux-kernel@vger.kernel.org (open list), linux-hardening@vger.kernel.org (open list:KERNEL HARDENING (not covered by other areas):Keyword:\b__counted_by(_le|_be|_ptr)?\b) Subject: [PATCHv3 3/8] dmaengine: ti: omap-dma: fix CPU PM notifier leak Date: Tue, 2 Jun 2026 20:07:49 -0700 Message-ID: <20260603030754.288757-4-rosenp@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260603030754.288757-1-rosenp@gmail.com> References: <20260603030754.288757-1-rosenp@gmail.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The CPU PM notifier may be registered for needs_busy_check on omap2 rather than may_lose_context on omap3. The remove path only checked may_lose_context, leaving the omap2 notifier registered during driver removal. Check both configuration flags before unregistering the notifier. Fixes: f4cfa36dab67 ("dmaengine: ti: omap-dma: Use cpu notifier to block idle for omap2") Cc: stable@vger.kernel.org Assisted-by: Codex:GPT-5 Signed-off-by: Rosen Penev --- drivers/dma/ti/omap-dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/ti/omap-dma.c b/drivers/dma/ti/omap-dma.c index 15be3c90440a..0ad8da8b35f8 100644 --- a/drivers/dma/ti/omap-dma.c +++ b/drivers/dma/ti/omap-dma.c @@ -1854,7 +1854,7 @@ static void omap_dma_remove(struct platform_device *pdev) struct omap_dmadev *od = platform_get_drvdata(pdev); int irq; - if (od->cfg->may_lose_context) { + if (od->cfg->needs_busy_check || od->cfg->may_lose_context) { cpu_pm_unregister_notifier(&od->nb); synchronize_rcu(); } -- 2.54.0