linux-kernel - [RFC patch resend] DMA engine/Langwell: release LLI pool

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Date:	Sat, 13 Aug 2011 12:16:43 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	"Koul, Vinod" <vinod.koul@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [RFC patch resend] DMA engine/Langwell: release LLI pool

When releasing resources allocated before for DMA channel, checking LLI pool
is added and it is reclaimed if necessary.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/drivers/dma/intel_mid_dma.c	Sat Aug 13 11:44:46 2011
+++ intel_mid_dma.c	Sat Aug 13 12:21:41 2011
@@ -833,6 +833,11 @@ static void intel_mid_dma_free_chan_reso
 	midc->descs_allocated = 0;
 	list_for_each_entry_safe(desc, _desc, &midc->active_list, desc_node) {
 		list_del(&desc->desc_node);
+		if (desc->lli != NULL) {
+			pci_pool_free(desc->lli_pool, desc->lli,
+					desc->lli_phys);
+			pci_pool_destroy(desc->lli_pool);
+		}
 		pci_pool_free(mid->dma_pool, desc, desc->txd.phys);
 	}
 	list_for_each_entry_safe(desc, _desc, &midc->free_list, desc_node) {
@@ -841,6 +846,11 @@ static void intel_mid_dma_free_chan_reso
 	}
 	list_for_each_entry_safe(desc, _desc, &midc->queue, desc_node) {
 		list_del(&desc->desc_node);
+		if (desc->lli != NULL) {
+			pci_pool_free(desc->lli_pool, desc->lli,
+					desc->lli_phys);
+			pci_pool_destroy(desc->lli_pool);
+		}
 		pci_pool_free(mid->dma_pool, desc, desc->txd.phys);
 	}
 	spin_unlock_bh(&midc->lock);
--
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