From: Shenghui Shi Date: Mon, 9 Feb 2026 10:37:25 +0000 (+0800) Subject: dmaengine: dw-edma: fix MSI data programming for multi-IRQ case X-Git-Tag: v7.0-rc6~3^2~19 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=77b19d053ac2cce9e873007ad4b09f2323c93576;p=thirdparty%2Flinux.git dmaengine: dw-edma: fix MSI data programming for multi-IRQ case When using MSI (not MSI-X) with multiple IRQs, the MSI data value must be unique per vector to ensure correct interrupt delivery. Currently, the driver fails to increment the MSI data per vector, causing interrupts to be misrouted. Fix this by caching the base MSI data and adjusting each vector's data accordingly during IRQ setup. Fixes: e63d79d1ff04 ("dmaengine: dw-edma: Add Synopsys DesignWare eDMA IP core driver") Signed-off-by: Shenghui Shi Reviewed-by: Frank Li Link: https://patch.msgid.link/20260209103726.414-1-brody.shi@m2semi.com Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c index e7d698b352d37..5397dbda4f724 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -844,6 +844,7 @@ static int dw_edma_irq_request(struct dw_edma *dw, { struct dw_edma_chip *chip = dw->chip; struct device *dev = dw->chip->dev; + struct msi_desc *msi_desc; u32 wr_mask = 1; u32 rd_mask = 1; int i, err = 0; @@ -895,9 +896,12 @@ static int dw_edma_irq_request(struct dw_edma *dw, &dw->irq[i]); if (err) goto err_irq_free; - - if (irq_get_msi_desc(irq)) + msi_desc = irq_get_msi_desc(irq); + if (msi_desc) { get_cached_msi_msg(irq, &dw->irq[i].msi); + if (!msi_desc->pci.msi_attrib.is_msix) + dw->irq[i].msi.data = dw->irq[0].msi.data + i; + } } dw->nr_irqs = i;