From acb33cc541d7a5495b16a133702d4c401ea4e294 Mon Sep 17 00:00:00 2001 From: "Vutla, Lokesh" Date: Thu, 2 Jul 2015 18:33:28 +0530 Subject: [PATCH] crypto: omap-des - Fix unmapping of dma channels dma_unmap_sg() is being called twice after completing the task. Looks like this is a copy paste error when creating des driver. With this the following warn appears during boot: [ 4.210457] ------------[ cut here ]------------ [ 4.215114] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:1080 check_unmap+0x710/0x9a0() [ 4.222899] omap-des 480a5000.des: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x00000000ab2ce000] [size=8 bytes] [ 4.236785] Modules linked in: [ 4.239860] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.39-02999-g1bc045a-dirty #182 [ 4.247918] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 4.255710] [] (show_stack) from [] (dump_stack+0x84/0xb8) [ 4.262977] [] (dump_stack) from [] (warn_slowpath_common+0x68/0x8c) [ 4.271107] [] (warn_slowpath_common) from [] (warn_slowpath_fmt+0x30/0x40) [ 4.279854] [] (warn_slowpath_fmt) from [] (check_unmap+0x710/0x9a0) [ 4.287991] [] (check_unmap) from [] (debug_dma_unmap_sg+0x90/0x19c) [ 4.296128] [] (debug_dma_unmap_sg) from [] (omap_des_done_task+0x1cc/0x3e4) [ 4.304963] [] (omap_des_done_task) from [] (tasklet_action+0x84/0x124) [ 4.313370] [] (tasklet_action) from [] (__do_softirq+0xf0/0x20c) [ 4.321235] [] (__do_softirq) from [] (irq_exit+0x98/0xec) [ 4.328500] [] (irq_exit) from [] (handle_IRQ+0x50/0xb0) [ 4.335589] [] (handle_IRQ) from [] (gic_handle_irq+0x28/0x5c) Removing the duplicate call to dma_unmap_sg(). Cc: stable@vger.kernel.org Reported-by: Tomi Valkeinen Signed-off-by: Lokesh Vutla Signed-off-by: Herbert Xu --- drivers/crypto/omap-des.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c index 46307098f8ba..0a70e46d5416 100644 --- a/drivers/crypto/omap-des.c +++ b/drivers/crypto/omap-des.c @@ -536,9 +536,6 @@ static int omap_des_crypt_dma_stop(struct omap_des_dev *dd) dmaengine_terminate_all(dd->dma_lch_in); dmaengine_terminate_all(dd->dma_lch_out); - dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); - dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE); - return err; } -- 2.30.2