The patch

   spi: spi-topcliff-pch: Replace GFP_ATOMIC with GFP_KERNEL in 

has been applied to the spi tree at 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

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>From d16cd3eb8e5c62cd349987f57e3511b59cbe0198 Mon Sep 17 00:00:00 2001
From: Jia-Ju Bai <>
Date: Tue, 10 Apr 2018 17:06:16 +0800
Subject: [PATCH] spi: spi-topcliff-pch: Replace GFP_ATOMIC with GFP_KERNEL in

pch_spi_handle_dma() is never called in atomic context.
This function is only called by pch_spi_process_messages().
pch_spi_process_messages() is only set as a parameter of INIT_WORK() in

Despite never getting called from atomic context,
pch_spi_handle_dma() calls kcalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <>
Signed-off-by: Mark Brown <>
 drivers/spi/spi-topcliff-pch.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 97d137591b18..dc93ca9e001c 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1007,7 +1007,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, 
int *bpw)
        spin_unlock_irqrestore(&data->lock, flags);
        /* RX */
-       dma->sg_rx_p = kcalloc(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC);
+       dma->sg_rx_p = kcalloc(num, sizeof(*dma->sg_rx_p), GFP_KERNEL);
        sg_init_table(dma->sg_rx_p, num); /* Initialize SG table */
        /* offset, length setting */
        sg = dma->sg_rx_p;
@@ -1067,7 +1067,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, 
int *bpw)
                head = 0;
-       dma->sg_tx_p = kcalloc(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC);
+       dma->sg_tx_p = kcalloc(num, sizeof(*dma->sg_tx_p), GFP_KERNEL);
        sg_init_table(dma->sg_tx_p, num); /* Initialize SG table */
        /* offset, length setting */
        sg = dma->sg_tx_p;

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