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Date: Tue, 10 Aug 2021 19:28:35 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>, Dave Jiang <dave.jiang@...el.com> Subject: [PATCH 5.13 007/175] dmaengine: idxd: fix setup sequence for MSIXPERM table From: Dave Jiang <dave.jiang@...el.com> [ Upstream commit d5c10e0fc8645342fe5c9796b00c84ab078cd713 ] The MSIX permission table should be programmed BEFORE request_irq() happens. This prevents any possibility of an interrupt happening before the MSIX perm table is setup, however slight. Fixes: 6df0e6c57dfc ("dmaengine: idxd: clear MSIX permission entry on shutdown") Sign-off-by: Dave Jiang <dave.jiang@...el.com> Link: https://lore.kernel.org/r/162456741222.1138073.1298447364671237896.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/dma/idxd/init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 442d55c11a5f..4bc80eb6b9e7 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -102,6 +102,8 @@ static int idxd_setup_interrupts(struct idxd_device *idxd) spin_lock_init(&idxd->irq_entries[i].list_lock); } + idxd_msix_perm_setup(idxd); + irq_entry = &idxd->irq_entries[0]; rc = request_threaded_irq(irq_entry->vector, NULL, idxd_misc_thread, 0, "idxd-misc", irq_entry); @@ -148,7 +150,6 @@ static int idxd_setup_interrupts(struct idxd_device *idxd) } idxd_unmask_error_interrupts(idxd); - idxd_msix_perm_setup(idxd); return 0; err_wq_irqs: @@ -162,6 +163,7 @@ static int idxd_setup_interrupts(struct idxd_device *idxd) err_misc_irq: /* Disable error interrupt generation */ idxd_mask_error_interrupts(idxd); + idxd_msix_perm_clear(idxd); err_irq_entries: pci_free_irq_vectors(pdev); dev_err(dev, "No usable interrupts\n"); -- 2.30.2
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