linux-stable.git/drivers/spi, branch v4.9.296

spi: bcm-qspi: Fix missing clk_disable_unprepare() on error in bcm_qspi_probe()

2021-11-26T10:48:32+00:00

[ Upstream commit ca9b8f56ec089d3a436050afefd17b7237301f47 ]

Fix the missing clk_disable_unprepare() before return
from bcm_qspi_probe() in the error handling case.

Reported-by: Hulk Robot 
Signed-off-by: Yang Yingliang 
Link: https://lore.kernel.org/r/20211018073413.2029081-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: spl022: fix Microwire full duplex mode

2021-11-26T10:48:21+00:00

[ Upstream commit d81d0e41ed5fe7229a2c9a29d13bad288c7cf2d2 ]

There are missing braces in the function that verify controller parameters,
then an error is always returned when the parameter to select Microwire
frames operation is used on devices allowing it.

Signed-off-by: Thomas Perrot 
Link: https://lore.kernel.org/r/20211022142104.1386379-1-thomas.perrot@bootlin.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: Fix tegra20 build with CONFIG_PM=n

2021-10-06T08:23:40+00:00

[ Upstream commit efafec27c5658ed987e720130772f8933c685e87 ]

Without CONFIG_PM enabled, the SET_RUNTIME_PM_OPS() macro ends up being
empty, and the only use of tegra_slink_runtime_{resume,suspend} goes
away, resulting in

  drivers/spi/spi-tegra20-slink.c:1200:12: error: ‘tegra_slink_runtime_resume’ defined but not used [-Werror=unused-function]
   1200 | static int tegra_slink_runtime_resume(struct device *dev)
        |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/spi/spi-tegra20-slink.c:1188:12: error: ‘tegra_slink_runtime_suspend’ defined but not used [-Werror=unused-function]
   1188 | static int tegra_slink_runtime_suspend(struct device *dev)
        |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~

mark the functions __maybe_unused to make the build happy.

This hits the alpha allmodconfig build (and others).

Reported-by: Guenter Roeck 
Signed-off-by: Linus Torvalds 
Signed-off-by: Sasha Levin

spi: spi-pic32: Fix issue with uninitialized dma_slave_config

2021-09-22T09:42:59+00:00

[ Upstream commit 976c1de1de147bb7f4e0d87482f375221c05aeaf ]

Depending on the DMA driver being used, the struct dma_slave_config may
need to be initialized to zero for the unused data.

For example, we have three DMA drivers using src_port_window_size and
dst_port_window_size. If these are left uninitialized, it can cause DMA
failures.

For spi-pic32, this is probably not currently an issue but is still good to
fix though.

Fixes: 1bcb9f8ceb67 ("spi: spi-pic32: Add PIC32 SPI master driver")
Cc: Purna Chandra Mandal 
Cc: Peter Ujfalusi 
Cc: Vinod Koul 
Signed-off-by: Tony Lindgren 
Link: https://lore.kernel.org/r/20210810081727.19491-2-tony@atomide.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: mediatek: Fix fifo transfer

2021-08-08T06:38:54+00:00

commit 0d5c3954b35eddff0da0436c31e8d721eceb7dc2 upstream.

Commit 3a70dd2d0503 ("spi: mediatek: fix fifo rx mode") claims that
fifo RX mode was never handled, and adds the presumably missing code
to the FIFO transfer function. However, the claim that receive data
was not handled is incorrect. It was handled as part of interrupt
handling after the transfer was complete. The code added with the above
mentioned commit reads data from the receive FIFO before the transfer
is started, which is wrong. This results in an actual transfer error
on a Hayato Chromebook.

Remove the code trying to handle receive data before the transfer is
started to fix the problem.

Fixes: 3a70dd2d0503 ("spi: mediatek: fix fifo rx mode")
Cc: Peter Hess 
Cc: Frank Wunderlich 
Cc: Tzung-Bi Shih 
Cc: Hsin-Yi Wang 
Signed-off-by: Guenter Roeck 
Tested-by: Hsin-Yi Wang 
Tested-by: Tzung-Bi Shih 
Link: https://lore.kernel.org/r/20210802030023.1748777-1-linux@roeck-us.net
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

spi: mediatek: fix fifo rx mode

2021-07-28T07:14:27+00:00

[ Upstream commit 3a70dd2d050331ee4cf5ad9d5c0a32d83ead9a43 ]

In FIFO mode were two problems:
- RX mode was never handled and
- in this case the tx_buf pointer was NULL and caused an exception

fix this by handling RX mode in mtk_spi_fifo_transfer

Fixes: a568231f4632 ("spi: mediatek: Add spi bus for Mediatek MT8173")
Signed-off-by: Peter Hess 
Signed-off-by: Frank Wunderlich 
Link: https://lore.kernel.org/r/20210706121609.680534-1-linux@fw-web.de
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: spi-sun6i: Fix chipselect/clock bug

2021-07-20T14:21:01+00:00

[ Upstream commit 0d7993b234c9fad8cb6bec6adfaa74694ba85ecb ]

The current sun6i SPI implementation initializes the transfer too early,
resulting in SCK going high before the transfer. When using an additional
(gpio) chipselect with sun6i, the chipselect is asserted at a time when
clock is high, making the SPI transfer fail.

This is due to SUN6I_GBL_CTL_BUS_ENABLE being written into
SUN6I_GBL_CTL_REG at an early stage. Moving that to the transfer
function, hence, right before the transfer starts, mitigates that
problem.

Fixes: 3558fe900e8af (spi: sunxi: Add Allwinner A31 SPI controller driver)
Signed-off-by: Mirko Vogt 
Signed-off-by: Ralf Schlatterbeck 
Link: https://lore.kernel.org/r/20210614144507.y3udezjfbko7eavv@runtux.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: omap-100k: Fix the length judgment problem

2021-07-20T14:20:58+00:00

[ Upstream commit e7a1a3abea373e41ba7dfe0fbc93cb79b6a3a529 ]

word_len should be checked in the omap1_spi100k_setup_transfer
function to see if it exceeds 32.

Signed-off-by: Tian Tao 
Link: https://lore.kernel.org/r/1619695248-39045-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: spi-topcliff-pch: Fix potential double free in pch_spi_process_messages()

2021-07-20T14:20:58+00:00

[ Upstream commit 026a1dc1af52742c5897e64a3431445371a71871 ]

pch_spi_set_tx() frees data->pkt_tx_buff on failure of kzalloc() for
data->pkt_rx_buff, but its caller, pch_spi_process_messages(), will
free data->pkt_tx_buff again. Set data->pkt_tx_buff to NULL after
kfree() to avoid double free.

Signed-off-by: Jay Fang 
Link: https://lore.kernel.org/r/1620284888-65215-1-git-send-email-f.fangjian@huawei.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

spi: spi-loopback-test: Fix 'tx_buf' might be 'rx_buf'

2021-07-20T14:20:58+00:00

[ Upstream commit 9e37a3ab0627011fb63875e9a93094b6fc8ddf48 ]

In function 'spi_test_run_iter': Value 'tx_buf' might be 'rx_buf'.

Signed-off-by: Jay Fang 
Link: https://lore.kernel.org/r/1620629903-15493-5-git-send-email-f.fangjian@huawei.com
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin