netdev - [PATCH 08/16] IB/qib: stop passing bogus gfp flags arguments to dma_alloc

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Date:   Fri, 14 Jun 2019 15:47:18 +0200
From:   Christoph Hellwig <hch@....de>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Ian Abbott <abbotti@....co.uk>,
        H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc:     Intel Linux Wireless <linuxwifi@...el.com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM PORT),
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-rdma@...r.kernel.org, linux-media@...r.kernel.org,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-s390@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 08/16] IB/qib: stop passing bogus gfp flags arguments to dma_alloc_coherent

dma_alloc_coherent is not just the page allocator.  The only valid
arguments to pass are either GFP_ATOMIC or GFP_ATOMIC with possible
modifiers of __GFP_NORETRY or __GFP_NOWARN.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/infiniband/hw/qib/qib_iba6120.c |  2 +-
 drivers/infiniband/hw/qib/qib_init.c    | 20 +++-----------------
 2 files changed, 4 insertions(+), 18 deletions(-)

diff --git a/drivers/infiniband/hw/qib/qib_iba6120.c b/drivers/infiniband/hw/qib/qib_iba6120.c
index 531d8a1db2c3..d8a0b8993d22 100644
--- a/drivers/infiniband/hw/qib/qib_iba6120.c
+++ b/drivers/infiniband/hw/qib/qib_iba6120.c
@@ -2076,7 +2076,7 @@ static void alloc_dummy_hdrq(struct qib_devdata *dd)
 	dd->cspec->dummy_hdrq = dma_alloc_coherent(&dd->pcidev->dev,
 					dd->rcd[0]->rcvhdrq_size,
 					&dd->cspec->dummy_hdrq_phys,
-					GFP_ATOMIC | __GFP_COMP);
+					GFP_ATOMIC);
 	if (!dd->cspec->dummy_hdrq) {
 		qib_devinfo(dd->pcidev, "Couldn't allocate dummy hdrq\n");
 		/* fallback to just 0'ing */
diff --git a/drivers/infiniband/hw/qib/qib_init.c b/drivers/infiniband/hw/qib/qib_init.c
index d4fd8a6cff7b..072885a6684d 100644
--- a/drivers/infiniband/hw/qib/qib_init.c
+++ b/drivers/infiniband/hw/qib/qib_init.c
@@ -1547,18 +1547,13 @@ int qib_create_rcvhdrq(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
 
 	if (!rcd->rcvhdrq) {
 		dma_addr_t phys_hdrqtail;
-		gfp_t gfp_flags;
-
 		amt = ALIGN(dd->rcvhdrcnt * dd->rcvhdrentsize *
 			    sizeof(u32), PAGE_SIZE);
-		gfp_flags = (rcd->ctxt >= dd->first_user_ctxt) ?
-			GFP_USER : GFP_KERNEL;
 
 		old_node_id = dev_to_node(&dd->pcidev->dev);
 		set_dev_node(&dd->pcidev->dev, rcd->node_id);
 		rcd->rcvhdrq = dma_alloc_coherent(
-			&dd->pcidev->dev, amt, &rcd->rcvhdrq_phys,
-			gfp_flags | __GFP_COMP);
+			&dd->pcidev->dev, amt, &rcd->rcvhdrq_phys, GFP_KERNEL);
 		set_dev_node(&dd->pcidev->dev, old_node_id);
 
 		if (!rcd->rcvhdrq) {
@@ -1578,7 +1573,7 @@ int qib_create_rcvhdrq(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
 			set_dev_node(&dd->pcidev->dev, rcd->node_id);
 			rcd->rcvhdrtail_kvaddr = dma_alloc_coherent(
 				&dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail,
-				gfp_flags);
+				GFP_KERNEL);
 			set_dev_node(&dd->pcidev->dev, old_node_id);
 			if (!rcd->rcvhdrtail_kvaddr)
 				goto bail_free;
@@ -1622,17 +1617,8 @@ int qib_setup_eagerbufs(struct qib_ctxtdata *rcd)
 	struct qib_devdata *dd = rcd->dd;
 	unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
 	size_t size;
-	gfp_t gfp_flags;
 	int old_node_id;
 
-	/*
-	 * GFP_USER, but without GFP_FS, so buffer cache can be
-	 * coalesced (we hope); otherwise, even at order 4,
-	 * heavy filesystem activity makes these fail, and we can
-	 * use compound pages.
-	 */
-	gfp_flags = __GFP_RECLAIM | __GFP_IO | __GFP_COMP;
-
 	egrcnt = rcd->rcvegrcnt;
 	egroff = rcd->rcvegr_tid_base;
 	egrsize = dd->rcvegrbufsize;
@@ -1664,7 +1650,7 @@ int qib_setup_eagerbufs(struct qib_ctxtdata *rcd)
 		rcd->rcvegrbuf[e] =
 			dma_alloc_coherent(&dd->pcidev->dev, size,
 					   &rcd->rcvegrbuf_phys[e],
-					   gfp_flags);
+					   GFP_KERNEL);
 		set_dev_node(&dd->pcidev->dev, old_node_id);
 		if (!rcd->rcvegrbuf[e])
 			goto bail_rcvegrbuf_phys;
-- 
2.20.1