2016-09-10 20:54:26 +08:00
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From 2ace17c79f413a43950944cf282235ea3de8c6e2 Mon Sep 17 00:00:00 2001
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2016-02-25 18:14:01 +08:00
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 15 Feb 2016 10:00:27 +0000
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2016-09-10 20:54:26 +08:00
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Subject: [PATCH] bcm2835-sdhost: Restore ATOMIC flag to PIO sg mapping
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2016-02-25 18:14:01 +08:00
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Allocation problems have been seen in a wireless driver, and
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this is the only change which might have been responsible.
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---
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drivers/mmc/host/bcm2835-sdhost.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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--- a/drivers/mmc/host/bcm2835-sdhost.c
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+++ b/drivers/mmc/host/bcm2835-sdhost.c
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@@ -874,15 +874,14 @@ static void bcm2835_sdhost_prepare_data(
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host->flush_fifo = 0;
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host->data->bytes_xfered = 0;
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-
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if (!host->dma_desc) {
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/* Use PIO */
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- int flags;
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+ int flags = SG_MITER_ATOMIC;
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if (data->flags & MMC_DATA_READ)
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- flags = SG_MITER_TO_SG;
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+ flags |= SG_MITER_TO_SG;
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else
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- flags = SG_MITER_FROM_SG;
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+ flags |= SG_MITER_FROM_SG;
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sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
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host->blocks = data->blocks;
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}
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